Unidentified Signals

From Signal Identification Wiki
Jump to: navigation, search
== Unidentified Signals ==

Unidentified Signals

Browse List of Unknown Signals in Database
If you have an unidentified signal that you would like the wiki readers to take a look at please use the form linked below. Include as much information about the signal as you can including frequency, waterfall images, MP3 sound samples, location, bandwidth and anything else you can think of. Please consult the instructions here for more information on adding a signal - Adding An Example Signal.


If you happen to be able to identify a signal, please either edit the wiki (See the Adding An Example Signal page to see how to convert a signal from Unidentified to Identified) or make a note in the wiki discussion page (in the signal page click the discussion tab at the top) or make a comment in the comments area on the Unidentified Signals Database main page.


Title
Frequency range
Location
Mode
Modulation
Sort by order



SMW::offSMW::on
Signal type Description Frequency Mode Modulation Bandwidth Location Sample Audio Waterfall image
"16-Tone" Drifting FSK Signal This signal has been spotted by Antenna101 in Sarajevo, Bosnia and Herzegovina on 10th December 2023. 603 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 603MHz.png
(RTTY?) Somehow the Audiofile got corrupted. I'll try to add if, if it appears agian(mostly in the evening).

HAM is a new teretory for me, so please excuse me, if this is a stupid question. I've taken a look into the Database, but no signal I've seen matches the specifications for this one.

This is mobitex - Arclamp, Somehow the Audiofile got corrupted. I'll try to add if, if it appears agian(mostly in the evening). HAM is a new teretory for me, so please excuse me, if this is a stupid question. I've taken a look into the Database, but no signal I've seen matches the specifications for this one.

This is mobitex - Arclamp
424.67 MHzMegaHertz (MHz) 10^6 Hz, 424.67 MHzMegaHertz (MHz) 10^6 Hz 11 kHzKiloHertz (kHz) 10^3 Hz, 11 kHzKiloHertz (kHz) 10^3 Hz SDRSharp ZWdAsnpNEb.png
10.730 Mhz 10.730Mhz Uknown Signal . Signal also appears on 10,570. 10.57 MHzMegaHertz (MHz) 10^6 Hz — 10.73 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz 522.PNG
145.870MHz I couldn't get a small file of the IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis.. However, this frequency's always populated with evenly spaced lines of just that, and it typically forms 145.863 MHzMegaHertz (MHz) 10^6 Hz — 145.885 MHzMegaHertz (MHz) 10^6 Hz 30 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). J0ZtywcH.png
147 Mhz burst type data
160.282.000 in Berlin, Germany Intersting signal found close to railways. Not sure about purpose. Might be PSKPhase-Shift Keying? 160,282 MHzMegaHertz (MHz) 10^6 Hz — 160,282.2 MHzMegaHertz (MHz) 10^6 Hz Bildschirmfoto 2015-12-31 um 10.10.23.png
170 Hz Carriers at 70 MHz Unknown Wideband Signal of multiple, varying, 170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). spaced-carriers. Extending over at least 69.3 - 70.6 MHzMegaHertz (MHz) 10^6 Hz 69.35 MHzMegaHertz (MHz) 10^6 Hz — 71.56 MHzMegaHertz (MHz) 10^6 Hz Unknown-Wideband-Signal-4m-WSPR-area 170Hz-Spaced-carriers-detail 5-Ap-21.jpg
184.320 MHz Unknown, Crystal Ocillator? Wikipedia references this frequency on its 'Crystal Ocillator Frequencies' page;" 184.320 -- WCDMA/3G -- Used in wireless base stations; 6x 30.72 MHzMegaHertz (MHz) 10^6 Hz " but I can't find much more information about 3G Base stations on this frequency, why or what it is for. 184.32 MHzMegaHertz (MHz) 10^6 Hz 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 2020-12-08 23 59 28-Window.png
2021-05-01T16 37 56Z 27105p00kHz 27.105 MHzMegaHertz (MHz) 10^6 Hz 12 kHzKiloHertz (kHz) 10^3 Hz SignalImageWF.png
236 MHZ pulses like a half sine pulses 236 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Signal236.png
260,722 MHz Continuous signal with FHSS "Waterdroplets" 260.722 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz 260.722.jpg
2740 MHz - US Weather Radar - WSR-88D??? Unknown Signal 2,740 MHzMegaHertz (MHz) 10^6 Hz, 2,740 MHzMegaHertz (MHz) 10^6 Hz MHzMegaHertz (MHz) 10^6 Hz WSR88d.PNG
3790KHz unidentified signal Received by luck on 3790KHz on after midnight of September 08 and September 09 2020 (Greece time). 3.79 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz No.jpg
3905 Khz Received this between 18-18:05 UTC on the 16th January 2018 3.905 MHzMegaHertz (MHz) 10^6 Hz, 3.905 MHzMegaHertz (MHz) 10^6 Hz
3985 kHz Recorded via Twente SDR (Enschede, Netherlands). 3.985 MHzMegaHertz (MHz) 10^6 Hz 3985-2019-04.png
40M pulsing spark gap lijke QRN every night continuing until daylight 40M pulsing spark gap like QRN 7.1 MHzMegaHertz (MHz) 10^6 Hz 200 kHzKiloHertz (kHz) 10^3 Hz K3FEF websdr-wide-spectrum-sparkgap-like-moving. sig.png
421.850 during Tour de France Unknown signal received during Tour de France near Paris. Signal looks like APT, but sure it is not. 421.85 MHzMegaHertz (MHz) 10^6 Hz 18 kHzKiloHertz (kHz) 10^3 Hz 421850000hz france.png
433p90 Repeating signal. seems like a wireless keyboard, bge power meter, or a comcast xr2 remote 433.9 MHzMegaHertz (MHz) 10^6 Hz 433.8 MHzMegaHertz (MHz) 10^6 Hz — 433.95 MHzMegaHertz (MHz) 10^6 Hz Screenshot 20190107-224118 SDRTouch.jpg
433p920 Rapid data bursts. two seem to be playing consecutively. 433.92 MHzMegaHertz (MHz) 10^6 Hz Screenshot 2023-06-10 144410.png
444, 275 MHz 43.723 MHzMegaHertz (MHz) 10^6 Hz — 444.275 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz Zaloo.jpg
479.999 Uknown Beeping Signal Found this signal on 479.999.810 MHzMegaHertz (MHz) 10^6 Hz. It is constantly transmitting on this frequency. I don't really know if it is a USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) modulation or not. 479.999 MHzMegaHertz (MHz) 10^6 Hz 1.3 MHzMegaHertz (MHz) 10^6 Hz Καταγραφή.PNG
80 Meter Unknown I get this signal from 3.0 MHzMegaHertz (MHz) 10^6 Hz through 6.5 MHzMegaHertz (MHz) 10^6 Hz about 480 KHzKiloHertz (kHz) 10^3 Hz apart Any Idea what it might be? MHzMegaHertz (MHz) 10^6 Hz — 6.5 MHzMegaHertz (MHz) 10^6 Hz 80M RFI PIC.jpg
863p151p150 863.151 MHzMegaHertz (MHz) 10^6 Hz 142 kHzKiloHertz (kHz) 10^3 Hz 1234.png
869.525 130 kHzKiloHertz (kHz) 10^3 Hz Unknown869.png
?? satellite maybe? RTTYRadio TeleTYpe HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
A bunch of alternating tones.. I found this while scanning around the military air band with my SDR, and about midway through the audio file, you can hear something that sounds like a modem, very odd. There are also more than one of them on the band, on several different frequencies. Never heard anything like it. ChinaVirus.PNG
AM signal Signal appeared on AMAmplitude Modulation band in March. At that time it was covering 580 kHzKiloHertz (kHz) 10^3 Hz to about 1160 kHzKiloHertz (kHz) 10^3 Hz strongest at 900 kHzKiloHertz (kHz) 10^3 Hz. It disappeared for a time and returned in August at less strength. Can be heard for about 8 miles to the north. We are on the ocean, so unknown how far in that direction. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Anomalous Russian signal Received a Russian? CQ call but the antenna was only a small Y/B LED hooked up to test the radio. I tried to get a recording but the event (around 7am) lasted only a few seconds. Seemed very narrow band though and I did some fine tuning to try and optimize it, in retrospect should have got a screen shot. 28.469 MHzMegaHertz (MHz) 10^6 Hz 25 kHzKiloHertz (kHz) 10^3 Hz
BBC Radio on 70m ? Just randomly saw it and though it was a normal amatuer but it has been going for 1 hour straight Its not fm interference . I have terreble signal or bbc radio so it is defendly not fm interference 442 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 11 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Screenshot 12.png
Beeping its a series of beeps in different tones (it might be a satellite but that is what I think) 7.044 kHzKiloHertz (kHz) 10^3 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Download (12).png
Beeping morse-like signal found on 599p99 MHz Beeping morse-like signal at 299,995MHz found in Lisbon, Portugal. Using stock antenna from RTL820T2 RTL dongle and SDR#. 299.995 MHzMegaHertz (MHz) 10^6 Hz 350 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 55.PNG
Bermuda 460.100MHz Recorded in Bermuda on 460.100Mhz. I believe it may be an MPT system? 460.1 MHzMegaHertz (MHz) 10^6 Hz
Bird Signal Appeared in 2021 then transmitted every day until it stopped around 4 months ago Sends weird distorted noises 445.3 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz
Bird Song Oddity Here is an Oddity Station heard on the WebSDR at the University of Twente that transmitted a loop of birds chirping. This recording is from May 16 2016. It occurred during the nights. Some say it may have been from Germany. Last heard around April 2017. 6.965 kHzKiloHertz (kHz) 10^3 Hz — 6.985 kHzKiloHertz (kHz) 10^3 Hz
Bonaire
Broadcast FM Whistling I was scanning FMFrequency Modulation radios when suddenly I found this. Possible solution: Hobbyist single-transistor tracking transmitter. 102 MHzMegaHertz (MHz) 10^6 Hz BroadcastFM Whistling 2.JPG
C4FM modulation + DSD Hello, I'm attempting to decode local police communication with GQRX and DSD. DSD is receiving the audio from GQRX fine, however it reports many errors when decoding. Comparing what I capture from my SDR from other examples on the internet, it seems the speed of the transmission I receive is slower than normal. I want to say the baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate of the local police transmission is lower than normal. I could be wrong on that as I am new to this. Any help/tips would be appreciated. Thanks.
CTCSS Alone Double CTCSS Code 28.08 MHzMegaHertz (MHz) 10^6 Hz 120 kHzKiloHertz (kHz) 10^3 Hz Captura.JPG
Canada 155.325 155 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Constant beeping sound Constant beeping noise. Does not emmit any sound on other modes than CWContinuous Wave. 296.69 MHzMegaHertz (MHz) 10^6 Hz 760 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Beep11.PNG
Constantly repeating signal 419.324 MHzMegaHertz (MHz) 10^6 Hz 16 kHzKiloHertz (kHz) 10^3 Hz Signalll.png
Continu signal on 423Mhz since today 20/01/21 Since today a continuously signal with a twisting waterfall..

Bandwith 12.5Khz

The audio file is RAW
423.425 MHzMegaHertz (MHz) 10^6 Hz 12 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 5 kHzKiloHertz (kHz) 10^3 Hz IMG 20210120 204535.jpg
Continuously signal on 424.493Mhz continuous signal on 2 different frequencies : 424.493Mhz and 424.793Mhz <-(on this frequency is the sound just a little slower) i think it has something to do with the public buscompany 424 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz SDR-Sharp-Screen-Grab-22325601012021 (2).jpg
DNA-like shifting frequencies signal It shows up as several mirror-images throughout the spectrum, some very close to each other, all of them exact copies of the original signal 800 MHzMegaHertz (MHz) 10^6 Hz — 900 MHzMegaHertz (MHz) 10^6 Hz Waterfall.png
Digital SSTV? Seen it on the Web-SDR Twente. It could be on any frequency.

It's quite a short signal to contain a picture. Text (a callsign?) is visible in the waterfall sometimes at the end and sometimes at the beginning of the soundburst. In the audiofile it is at the beginning. The signal begins at 30 second mark.

Someone suggested it was Easypal made signal
3.735 MHzMegaHertz (MHz) 10^6 Hz Knipsel.JPG
Digital code in UHF Tuner: Rtl-Sdr (RTL2832U+R820T2 100KHz 1.7GHz)

Antenna: TV antenna (ASP-8S) Software: SDR# Frequency: 447.772.200 HZ

Signal period: 0-24
447.722 MHzMegaHertz (MHz) 10^6 Hz 13.49 kHzKiloHertz (kHz) 10^3 Hz Waterfall20180527.png
Dot Signal Can be heard on any SDR Reciever,radio,even FMFrequency Modulation radio. 100 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 6.666 kHzKiloHertz (kHz) 10^3 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Dotsignal4204924.png
Dupliate of MPT1327 165 MHzMegaHertz (MHz) 10^6 Hz Unknown165p929.png
Electronic bagpipes I first heard this signal today, 11/28/2019 on 169.344.500 MHzMegaHertz (MHz) 10^6 Hz using HackRF SDR fed with a discone antenna, demodulated using SDR Console 3. It seems to be continuous over the span of half an hour. I have no idea what it may be, I heard a similar signal on 460.0500 MHzMegaHertz (MHz) 10^6 Hz on scanner. 169.345 MHzMegaHertz (MHz) 10^6 Hz 16 kHzKiloHertz (kHz) 10^3 Hz Electronic bagpipes.PNG
Errant Signal on 2m Ham Band Errant signal spread across the 2m ham band. Local interference ruled out. 147.455 MHzMegaHertz (MHz) 10^6 Hz Errant signal waterfall.jpg
Exotic Cipher An exotic polytone data type. 6.215 kHzKiloHertz (kHz) 10^3 Hz
FRN Gateway Data 27Mhz unid FRN Gateway Data 27Mhz unid FFSKFast Frequency-Shift Keying Data Signal 27 MHzMegaHertz (MHz) 10^6 Hz — 446 MHzMegaHertz (MHz) 10^6 Hz
FSK Data Rollercoaster Recording using USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables); baby monitor system is NFMNarrowband Frequency Modulation. 864.878 MHzMegaHertz (MHz) 10^6 Hz 32 kHzKiloHertz (kHz) 10^3 Hz Datarollercoaster.png
FSK Signal I was looking at a websdr when I found this odd signal. 6.94 MHzMegaHertz (MHz) 10^6 Hz 6.94 MHzMegaHertz (MHz) 10^6 Hz SIGLANAND.png
FSK? It looks like some type of FSKFrequency-Shift Keying signal on 409.300 MHzMegaHertz (MHz) 10^6 Hz. Probably some telemetry. 409.3 MHzMegaHertz (MHz) 10^6 Hz 7.5 kHzKiloHertz (kHz) 10^3 Hz 409300 sig.jpg
Found in Kings Beach,CA near 315mhz Found while driving through King's Beach,

CA. [1]

Relatively weak, visibly disperses over the ~2-4 miles driven during the waterfall recording.

(FYI the bursts near 315mhz, are just TPMS messages, as we were driving...)
314 MHzMegaHertz (MHz) 10^6 Hz — 315 MHzMegaHertz (MHz) 10^6 Hz 315mhz~kings beach.png
Frequency Drifting Data Transmission Unknown signal that constantly drifts in frequency between 13.795Mhz - 13.830Mhz, I'd like to learn what it is. Recorded in USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) modulation. 13.795 MHzMegaHertz (MHz) 10^6 Hz — 13.83 MHzMegaHertz (MHz) 10^6 Hz Weird freqs 2.JPG
Gas Meter Signal? I received this signal when I was looking on my waterfall, looking for DMR signals. I thought it was voice initially, but when I tuned to it, it turned out to be a strange signal, that I've not seen before. It's constant, but sometimes it seems like it's fading out but the signal's always there. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Guginchiiruchy.PNG
Generator Signal This signal only appears on 464,000 kHzKiloHertz (kHz) 10^3 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 464 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 2020-10-14 23 08 46-AIRSPY SDR- v1.0.0.1755 - Spy Server Network.png
Giant Band of Signal MHzMegaHertz (MHz) 10^6 Hz — 2 MHzMegaHertz (MHz) 10^6 Hz MHzMegaHertz (MHz) 10^6 Hz 1.5MHz.png
Ham Band Interference This is ALWAYS here, but much less strong at night. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Screenshot 2022-10-26 142608.png
I am constantly geting this wave it is usually seen 4-5 times daily with a duration about 30 min. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Bro nao 20180315 122627.png
Is this Packet Hi,

I Think this signal if for display hour of the Mistral-Nework (Network of buses for the town). Apologies for my poor english ! Best regards.

F5AAJ / Michel.
444.513 MHzMegaHertz (MHz) 10^6 Hz
K3UU-Unknown Comes on air every evening at 2300UTC and off air at 2400 UTC. The two frequencies where this signal is heard are always 282 kHzKiloHertz (kHz) 10^3 Hz apart. Heard on numerous EastCoast USA WebSDR receivers, although the farther north from Florida you get the weaker the signal is. Unable to hear on any South America WebSDR, as most of them are too far south. The attached recording was taken with LSBLower Side Band Modulation, bandwidth on receiver is 2.5 kHzKiloHertz (kHz) 10^3 Hz. 6.902 MHzMegaHertz (MHz) 10^6 Hz — 7.184 MHzMegaHertz (MHz) 10^6 Hz
MFSK in middle of tetra band A bit of a mystery MFSKMultiple Frequency Shift-Keying? signal in middle of tetra band 380 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 9,265 MHzMegaHertz (MHz) 10^6 Hz 5.28 kHzKiloHertz (kHz) 10^3 Hz 2017-01-18 09-38-17.png
Maritime Public Safety Radio Network P25 https://drive.google.com/drive/folders/0B1Cfk2C-y-z7d1dsbmlsMlBEWUE?usp=sharing This is a sample of my local Maritime Public Safety Radio Network in the APCO Project 25 mode. The reason I am submitting this is because no matter what I do, DSD+ does not decode it whatsoever. I have tested it on sample P25 signals, and it seems to work fine. 769.656 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz 769.65625MHz Screenshot.png
Maybe XF faders Sounds like XF Faders 4.5 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz
Mistery HF Signal seen on a Web Sdr radio Very wide Spectrum Signal seen at diverse parts of the HFHigh Frequency (3-30 MHz) Spectrum since a week starting in October 2020 4.915 kHzKiloHertz (kHz) 10^3 Hz kHzKiloHertz (kHz) 10^3 Hz Screen shot 2020-10-16 at 4.33.44 PM.png
Mysterious signal in low VHF band 35 MHzMegaHertz (MHz) 10^6 Hz — 75 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz Screenshot 2024-02-15 2144059.png
NDB beacon signals Multiple similar signals, the same sounds have been playing for years. 290 kHzKiloHertz (kHz) 10^3 Hz — 421 kHzKiloHertz (kHz) 10^3 Hz kHzKiloHertz (kHz) 10^3 Hz Screenshot 26.png
NOAA APT Oddity I was waiting for a pass from the satellite NOAA 18 when I was a choppy APT signal from what I assumed from NOAA 19, but a picture from WXtrack showed that its radio horizon was over 1,000 miles away from my location (the green cross).l I am not sure if this is some sort of signal propagation or if there was an old NOAA satellite that may have come back to life (I have seen articles from a few sources of how this might be). 137.1 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 45 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
New possible Russian Digimode The signal is believed to be a new russian communication mode/modem. I found this signal with my SdrplayRsp2Pro and a 15m (50ft) longwire antenna with 1:9 Unun. The signal was also heard on the Websdr in the Netherlands so it was not local. 10.225 MHzMegaHertz (MHz) 10^6 Hz — 10.24 MHzMegaHertz (MHz) 10^6 Hz 15 kHzKiloHertz (kHz) 10^3 Hz Image48754.png
Nknown 472p875 472.875 MHzMegaHertz (MHz) 10^6 Hz — 504.675 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 472.874.png
Noise on 160m Hi, this noise has recently appeared on top band, 160m and I wondered if anyone has any idea of it's origin. Speculation is that it is over the horizon radar coming from France. Any suggestions would be greatly appreciated since it is destroying a UK net that has been running on 1933 for many years. 1.933 MHzMegaHertz (MHz) 10^6 Hz 160 noise.jpg
Noise on HF HAM Bands from 0 to 30 Mhz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Hf noise.png
Noise over all HF bands Strange noise that starts middle of a day and ends in the evening. All HFHigh Frequency (3-30 MHz) bands are almost covered ( after 17MHz it starts to fade) clearly are visible harmonics. Qrm1.jpg
Noise-like signal There are stationary and moving signals I think. Likely police radio. 148.6 MHzMegaHertz (MHz) 10^6 Hz — 169.775 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz Noise like signal.png
Non lo so vorrei sapere che segnale è, ci sono momenti in cui gli impulsi cambiano come per completare un messaggio, va avanti per ore credo, e non c'è sempre, in certi giorni c'è credo, e la seconda volta che lo trovo [ I would like to know what signal it is, there are times when the impulses change as if to complete a message, it goes on for hours I think, and it's not always there ] 163.89 MHzMegaHertz (MHz) 10^6 Hz Afwffa.PNG
Odd Signal Was scanning around the 10 meter band with my SDR when I found this AMAmplitude Modulation signal. 25.175 MHzMegaHertz (MHz) 10^6 Hz CAAAAAAADDDD.PNG
Odd signal not sure if it could be analog or not but i haven't seen anything like it. 6.58 MHzMegaHertz (MHz) 10^6 Hz Screenshot 2020-02-11 at 9.34.31 AM(1).png
One of many signals near 877 MHz Probably 3G or 4G cellular signals 877.875 MHzMegaHertz (MHz) 10^6 Hz 2.55 MHzMegaHertz (MHz) 10^6 Hz Mysterysignal877.png
One with squelch Left signal keeps period pretty well. Haven't noticed any changes yet. It's not always active, but I can see it most of the day. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. available 137.5 MHzMegaHertz (MHz) 10^6 Hz 60 kHzKiloHertz (kHz) 10^3 Hz Two one with squelch.jpg
Over the Horizon Radar 14.541 MHzMegaHertz (MHz) 10^6 Hz 30 kHzKiloHertz (kHz) 10^3 Hz Dfgdfgdg77.png
Possible Russian Marker 'Airhorn' 4020kHz Unknown signal that was recently discovered a few days ago on the uTwente webSDR. Features a suppressed lower sideband. Strong reception in Poland's webSDR. 4.02 MHzMegaHertz (MHz) 10^6 Hz 2.8 kHzKiloHertz (kHz) 10^3 Hz Screen Shot 2017-02-03 at 7.26.06 PM.png
Possible Telemetry GFSK signal on 220Mhz Possible train telemetry signal on 220.365Mhz. Pulsed GFSKGaussian Frequency-Shift Keying signal. Runs 24x7 220.365 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 220 365Mhz-GFSK-Signal.jpg
Possible low level wind shear alert system Frequency matches known wind shear alert system frequencies used in aeronautics. Captured near an airport, so this is likely, but have no way to confirm. 409.572 MHzMegaHertz (MHz) 10^6 Hz 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Ss+(2015-09-29+at+12.58.34).jpg
Possible weather station sensor on air band Three strong signals at 120MHz, in the air band. Source of signal is unknown. Polarisation seems to be circular, as both vertical and horizontal dipoles can receive it at similar strengths. 120 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz — 14 kHzKiloHertz (kHz) 10^3 Hz Unknown station.jpg
Possibly a RADAR https://www.reddit.com/r/RTLSDR/comments/aa2hi6/found_at_3603018_mhz_in_massachusetts_any_idea/ 360.3 MHzMegaHertz (MHz) 10^6 Hz 618576d.png
Potential Radar Unknown signal, about 1.7 seconds in length, with an interval of around 6 to 8 seconds. Recorded via Twente SDR. An identical signal also appears around 4023-4040 Khz. 3.313 MHzMegaHertz (MHz) 10^6 Hz — 3.331 MHzMegaHertz (MHz) 10^6 Hz 18 kHzKiloHertz (kHz) 10^3 Hz 3310khz.PNG
Pulsar on 33.0005 GHz Hi i found this signal on 33GHz Freq., signal is pulsation from unknow source HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 33 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 200 kHzKiloHertz (kHz) 10^3 Hz Screenshot-2017-12-23-101913.png
Pulsing Digital Signal Pulsing signal I found. Transmits intermittently with varying amount of pulses. 410.85 MHzMegaHertz (MHz) 10^6 Hz — 474.975 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz Pulses 410850000.png
Pulsing interference in ISM band This pulsing is constant 24/7 dont know which type of interference it is, and it also seems to spread out like a mobile network when moving to the right of the main peak. 912.925 MHzMegaHertz (MHz) 10^6 Hz 32 kHzKiloHertz (kHz) 10^3 Hz Unknown pulse.PNG
RF signal modulate at low frequency Signal IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file can be downloaded from Microsoft file server :

Download files at : https://1drv.ms/u/s!AvlNmSqrGlNVgTF6qyGs9d8h3fBS

Note : File is +/- 2 GB

Waterfall image :

https://1drv.ms/i/s!AvlNmSqrGlNVgWivmYjg2UxL-zM1
HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Radar-like signal A burst signal like VDL 9.805 MHzMegaHertz (MHz) 10^6 Hz — 12.3 MHzMegaHertz (MHz) 10^6 Hz 5.6 kHzKiloHertz (kHz) 10^3 Hz Detailed-signal.jpeg
Radiomodem 423 875 Electric utility radiomodem network. Probably Satel radiomodem. 423.875 MHzMegaHertz (MHz) 10^6 Hz 25 kHzKiloHertz (kHz) 10^3 Hz F423875.png
Repeated Signal A repeated GMSKGaussian Minimum-Shift Keying signal found at 409.905MHz. Short burst repeats about every 2 minutes. Probably from a satellite in geosynchronous orbit. USA, Texas 409.905 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 409.9MHz.jpg
Repeated Tone 457p68 A repeated tone found at 457.68MHz - Cambridge, England, UK. 457.68 MHzMegaHertz (MHz) 10^6 Hz 13 kHzKiloHertz (kHz) 10^3 Hz Repeatedtone.png
Repeated across HF Strong CWContinuous Wave signal at approximately 3.064 kHzKiloHertz (kHz) 10^3 Hz, changes to 3.079 kHzKiloHertz (kHz) 10^3 Hz once per second for about a quarter of a second and then back. Possibly very fast sweep. Echos of it across the lower HFHigh Frequency (3-30 MHz) spectrum. Pauses on the high side periodically then resumes. Usually active during daylight hours, but not at night. 3.064 kHzKiloHertz (kHz) 10^3 Hz 15 kHzKiloHertz (kHz) 10^3 Hz UnknownSignal.png
Repeating signal 404MHz Many peaks from 403 to 405 MHzMegaHertz (MHz) 10^6 Hz, duration 1-2 seconds. Repeating. 403 MHzMegaHertz (MHz) 10^6 Hz — 405 MHzMegaHertz (MHz) 10^6 Hz Screenshot-2021-01-11-180016.jpeg
Rezonans-N type radar This is radar working about 10 seconds per hour every day on different frequencies. MHzMegaHertz (MHz) 10^6 Hz — 24 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz — 40 kHzKiloHertz (kHz) 10^3 Hz Radarimg 00.jpg
Same signal from unknow source 434 MHzMegaHertz (MHz) 10^6 Hz 300 kHzKiloHertz (kHz) 10^3 Hz Screenshot-2017-12-24-102147.png
Short PSK or AFSK pulses at 461.025 Either an extremely fast PSKPhase-Shift Keying or FSKFrequency-Shift Keying/AFSKAudio Frequency-Shift Keying link located in the UHFUltra High Frequency (300-3000 MHz) band appearing every second. Found today. 461.025 MHzMegaHertz (MHz) 10^6 Hz 9.2 kHzKiloHertz (kHz) 10^3 Hz Unknown 1 second blips 461.075 MHz.PNG
Signal inconnue 444.525 MHzMegaHertz (MHz) 10^6 Hz Screenshot-2019-10-19-154551.png
Signal that is moving down Weird signal that moves slower the lower it gets down the band. If the mode is set to NFMNarrowband Frequency Modulation, WFMWideband Frequency Modulation, AMAmplitude Modulation and probaly some more it doesn't give any sound. However in CWContinuous Wave and RAW it sounds like a high pitched noise. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Reww.PNG
Single Tone It keeps broadcasting nonstop (from the time I started listening). Doesn't seem to have a purpose, but what is making it? Used SDR# - Tuned in at 172.7551 MHzMegaHertz (MHz) 10^6 Hz - Recorded using CWContinuous Wave 172.755 MHzMegaHertz (MHz) 10^6 Hz 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown tone.PNG
Sliding tone Lasted from 15:45 UTC to 15:50 UTC

image

Inconsistent beeping, with pitch constantly sliding and changing, like a slide whistle
5.25 MHzMegaHertz (MHz) 10^6 Hz 2.4 kHzKiloHertz (kHz) 10^3 Hz
Some kind of MOBITEX I just found this signal with my RSP2. I have no idea what it is? Maybe Mobitex? 869.4 MHzMegaHertz (MHz) 10^6 Hz — 869.55 MHzMegaHertz (MHz) 10^6 Hz 150 kHzKiloHertz (kHz) 10^3 Hz Ghvgv.png
Squiggling oddity maybe a broken beacon or something? idk Capture45.PNG
Strange Musical Repeating Tone - 945.716 MHz Found when noticing harmonics in ~400 MHzMegaHertz (MHz) 10^6 Hz, comes out strongest @ 945.716 MHzMegaHertz (MHz) 10^6 Hz 945.716 MHzMegaHertz (MHz) 10^6 Hz 32 kHzKiloHertz (kHz) 10^3 Hz Sdasdzx.png
Strange Signal I found out that it was my old thermostat for my central heating. As soon as i pressed a button the signal changed. Replaced it with a new one. Now it is gone. 27 MHzMegaHertz (MHz) 10^6 Hz — 446 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Waterfall of the Signal.jpg
Strange beeps at 1.2ghz strange beeps @ the 1.200018 range (my rtl-sdr isn't calibrated right, so there may be frequency drift on my end) 1,200.019 MHzMegaHertz (MHz) 10^6 Hz 4.5 kHzKiloHertz (kHz) 10^3 Hz STRANGE.jpg
Strange signal starst at 13388-13640 khz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 250 kHzKiloHertz (kHz) 10^3 Hz BC unknown.png
Strange unknown signal on 423.550 mhz Hi, i don't know what it is, on 423.375 and 423.550 mhz very strange and strong unknown signal HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 10 kHzKiloHertz (kHz) 10^3 Hz Strange signal.PNG
Strong HF signal 7.735 kHzKiloHertz (kHz) 10^3 Hz — 16.11 kHzKiloHertz (kHz) 10^3 Hz 100 kHzKiloHertz (kHz) 10^3 Hz 21.jpg
Strong UNID Horn-like signal Incredibly strong horn-like signal. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 250 kHzKiloHertz (kHz) 10^3 Hz Loudbuzzing2.PNG
UNID Bursts This is a baby monitor located on the European ISM band. Most likely the data being transfered in an USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) modulation 864.95 MHzMegaHertz (MHz) 10^6 Hz 6.31 kHzKiloHertz (kHz) 10^3 Hz Deretgdfgdfgdfgfdg.PNG
UNID Telemetry This is a frequency I picked up in my home town, I believe it is telemetry from a water tower, but would like to know what standard it is using and if there's any way I can find a program that will decode its information. 461 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 10 MHzMegaHertz (MHz) 10^6 Hz TELEMETRYPIC.jpg
UNID Telemetry, pulsing Identified: APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area signal with position, probably some balloon I couldn't get an IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. sample in time because the signal started fading out. Hopefully this is not a problem. 443.287 MHzMegaHertz (MHz) 10^6 Hz 123123123123123123123123.PNG
UNID microwave sounding signal 12 MHz well, it sounds like someone left their chicken nuggets in the microwave on FMFrequency Modulation, completely UNID to me idk what it is, seems to be a real signal and not RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum. 12.022 MHzMegaHertz (MHz) 10^6 Hz — 12.025 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz Microwave sound ahhh screenshot.png
UNID telemetry/paging bursts Unknown telemetry or paging bursts. Sounds similar to this UNID signal: Unknown 40 3 446.45 MHzMegaHertz (MHz) 10^6 Hz 10 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unkn.PNG
UNKNOWN 10p140 Html5mediator: file extension not recognized
UNKNOWN 9.170 MHZ Signal seem to have three different modulation schemes, or there was multiple emitters. 9.176 MHzMegaHertz (MHz) 10^6 Hz — 9.236 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz
UnIdEastEurope Herd on 4181.0 Mhz via KDSR. One second tones like time sig but no voice or Morse code. Monitored at 2335 - 0020 UTC 4,181.8 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Waterfall 01.jpg.jpg
Unid 4-FSK Really long transmission. Started of with many minutes of 4 pilot tones 6.979 MHzMegaHertz (MHz) 10^6 Hz 1.9 kHzKiloHertz (kHz) 10^3 Hz 4-fsk.png
Unid ISM 900MHz Many frequency hopping ISM bursts. Telemetry of sorts. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file available 903 MHzMegaHertz (MHz) 10^6 Hz — 914 MHzMegaHertz (MHz) 10^6 Hz ISM 900.jpg
Unid Low VHF It is going 24/7, sometimes one stations, sometimes two. I believe it is something from the military. Location Kempele, Finland. 40.665 MHzMegaHertz (MHz) 10^6 Hz 2.4 kHzKiloHertz (kHz) 10^3 Hz Unid low-vhf1.jpg
Unid analogue signal - ecg like HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 50 kHzKiloHertz (kHz) 10^3 Hz 201607301318utc 008202k.jpg
Unidentified 433Mhz Oscillating Signal Band Reserved to ISM and LPD applications, unknown type of signal. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). kHzKiloHertz (kHz) 10^3 Hz Unidentified.jpg
Unidentified 460p214 Unidentified signal, 24/7 carrier, transmits mfsk-8? every 15 minutes. transmitter appears broken. 460.214 MHzMegaHertz (MHz) 10^6 Hz 14 kHzKiloHertz (kHz) 10^3 Hz M5jfh.png
Unidentified 466 MHz digital signal This signal changes frequencies every few seconds inside a range between 460-470 MHzMegaHertz (MHz) 10^6 Hz. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 2fsk signal 466.050MHz.png
Unidentified 5066p3kHz signal New to this stuff so not sure if it's an identifiable signal but does not seem to be a data transmission, appears to have been going on for at least a few hours at time of submitting. Your signal found is actually Link-11 apparently without a tone. <AT90S2323> 5.066 MHzMegaHertz (MHz) 10^6 Hz Waterfall5066p3.png
Unidentified 959.85MHz Mystery signal captured in Tulsa, Oklahoma. Signal has strong carrier at 959.85MHz with short pulses in about 4.5KHz each direction. 959.856 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 959.85 MHz mystery waterfall.png
Unidentified Bus Timetable Data Hi there, our local bus company in Aberdeen transmits timetable information to bus stops using this mode... but I can't identify what type of transmission it is. Hope someone can help! Received on 204.9625 MHzMegaHertz (MHz) 10^6 Hz in Aberdeen, Scotland. 204.963 MHzMegaHertz (MHz) 10^6 Hz Bus timetable.png
Unidentified DMR Signal 464.615 kHzKiloHertz (kHz) 10^3 Hz — 464.66 kHzKiloHertz (kHz) 10^3 Hz 21.17 kHzKiloHertz (kHz) 10^3 Hz Výs třižek.PNG
Unidentified Digital mode Tetra sounding signal that i cant figure out 782.15 MHzMegaHertz (MHz) 10^6 Hz — 782.7 MHzMegaHertz (MHz) 10^6 Hz 50 kHzKiloHertz (kHz) 10^3 Hz SDRSharp 2018-01-30 11-40-43.jpg
Unidentified FSK Signal Unidentified FSKFrequency-Shift Keying signal at 450.994MHz 450.994 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Screenshot 2017-01-10 22-33-23.png
Unidentified Signal at 2.4 GHz The signal works at 2.4 GHzGigaHertz (GHz) 10^9 Hz and the affected most of channels at 2.4 GHzGigaHertz (GHz) 10^9 Hz.There is always increase of SNR at various channels for Wi-FI signals. This Signal is modulated at low frequencies ( 30-100 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). ). HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Waterfal2.4ghzunk.png
Unidentified Signal on UHF Unidentified Signal on UHFUltra High Frequency (300-3000 MHz) Frequency 448.5 MHzMegaHertz (MHz) 10^6 Hz — 448.58 MHzMegaHertz (MHz) 10^6 Hz 448.5 MHzMegaHertz (MHz) 10^6 Hz — 448.58 MHzMegaHertz (MHz) 10^6 Hz Unsign1b.jpg
Unidentified Thing Submitted on behalf of Aaronata. Not sure what this was supposed to be. Thing.PNG
Unidentified digital signal on HF digital noise HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Html5mediator: file extension not recognized Waveform.jpg
Unidentified signal (APRS-like) This singnal is on air 24/7. Judging by existing records of frequency allocation, this belongs to a water company. Modulation unknown, so cannot decode and confirm. 149.1 MHzMegaHertz (MHz) 10^6 Hz 5.7 kHzKiloHertz (kHz) 10^3 Hz Screenshot 28.png
Unidentified signal at 161.252 kHz Signal at 161.252.000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). on 12 kHzKiloHertz (kHz) 10^3 Hz NFMNarrowband Frequency Modulation bandwidth. I think it's some sort of vessel communication system, because I live near the coast of Burgas, Bulgaria. I am not familiar with the decoding of this digital signal. 161.252 kHzKiloHertz (kHz) 10^3 Hz 12 kHzKiloHertz (kHz) 10^3 Hz UnSignal.PNG
Unidentified signal captured overlapping ch 16 marine emergency freq. It looks like some kind of frequency hopping system, as the actual bandwidth is of about 50 kHzKiloHertz (kHz) 10^3 Hz but the central frequency is rapidly changing during transmission to cover about a total of 200 kHzKiloHertz (kHz) 10^3 Hz. 156.805 MHzMegaHertz (MHz) 10^6 Hz 200 kHzKiloHertz (kHz) 10^3 Hz LatestCH16.jpeg
Unidientified (MFSK-13) Unidentified 13 tone MFSKMultiple Frequency Shift-Keying signal, measures about 32 milliseconds per tone, looks like serdolik with less tones and slower. Possible russian diplomatic signal 4.871 MHzMegaHertz (MHz) 10^6 Hz 3.2 kHzKiloHertz (kHz) 10^3 Hz Unid mfsk 13.PNG
Unindentified 438p838 Should be related to radiolocation services according to Croatia's signal allocations. 438.838 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Sig.PNG
Unk Russian Intel 1 Sample from RadioScanner, supposed to be a variant of russian intel digimode testing, unsure of name/variant. 2015-09-29 13-30 msk 106165 khz 1 mix mode fsk-2 125bd-500-2.jpg
Unk Russian Intel 2 Sample from RadioScanner.RU, supposed to be a variant of russian intel digimode testing, unsure of name/variant. PSKPhase-Shift Keying variant Russian-Intel-MFSK-PSK-19851kHz.jpg
Unk Russian Intel 3 Sample from RadioScanner, supposed to be a variant of russian intel digimode testing, unsure of name/variant. Possibly poor recording quality, unique preamble intro. Considerable high frequency losses in recording. Rus mfsk intro and single pic.jpg
Unk Russian Intel or Military lakisan Sample from RadioScanner, supposed to be a variant of russian intel or military digimode, unsure of name/variant. lakisan not sure 10346 lakisan rec.jpg
Unk Russian Intel or Military ofdm Sample from RadioScanner, supposed to be a variant of russian intel digimode, unsure of name/variant. Recorded by Karapuz supposedly. 2013-nov-25-13-31-06 karapuz rec.jpg
Unk Russian Intel or Military СТРYНА OFDM Sample from RadioScanner, supposed to be a variant of russian intel or military digimode testing, unsure of name/variant. Possibly recorded by KarapuZ, not sure where I got from. СТРYНА OFDM R V S records.jpg
Unknow 400MHz remote sensor of home weather station? 400 MHzMegaHertz (MHz) 10^6 Hz Screenshot-2020-12-22-190053.jpg
Unknow Happy new year and human voice The radio with happy new year melody and human voice 27.11 kHzKiloHertz (kHz) 10^3 Hz — 27.113 kHzKiloHertz (kHz) 10^3 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Aaaaaaahappynewyear.JPG
Unknow Signal 3.831 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 150px
Unknow signal lewis county Washington state recording on a PDA off of a unshelded Mic line. also heard on the AMAmplitude Modulation radio band at random times. I have heard it on my car radio at 1000khz, 1420khz, 530khz and intercoms , PA systems over 33 miles apart. MHzMegaHertz (MHz) 10^6 Hz
Unknown Have seen this many times HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). MHzMegaHertz (MHz) 10^6 Hz Unknown.jpg.jpg
Unknown "whistle" signal on 49m broadcast band Unknown whistling signal at 6065 khz 6.065 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz 6065 short.jpg
Unknown (V.29 fax machine) modem This signal is used for the latter or if no message is being broadcasted. (Like Glenayre paging link, including other purposes.) 406 MHzMegaHertz (MHz) 10^6 Hz — 455 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown fax machine modem 454.425 MHz.PNG
Unknown 07.077 MHz Heard at the lower end of 40m, digital band. Tried to match with existing signals at this Wiki but none found. 7.077 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 20180818 121147Z 7077kHz.PNG
Unknown 1 on going never ending, do not know what it is. 455 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 124 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Okänd.jpg
Unknown 139p024 Intermittent transmission in the 139.024MHz frequency. It also appeared near 137.915MHz and messed up my download from a NOAA satellite. It seems to be digital maybe? Most similar signal that I found was ACARS but this is not the correct frequency. 139.024 MHzMegaHertz (MHz) 10^6 Hz 16 kHzKiloHertz (kHz) 10^3 Hz 139024.PNG
Unknown 139p650 Central Texas receiving location 139.65 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz U139p650.png
Unknown 142p398 Posting a unidendified sound. Sound like a MotoTrbo but chopped. Frequency hopping? 142.399 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown 142p398.jpg
Unknown 14p219 What appears to be a FSKFrequency-Shift Keying / RTTYRadio TeleTYpe signal with unknown origin... Mark - Space @ 2100 - 1900 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). from centre frequency. 14.219 MHzMegaHertz (MHz) 10^6 Hz 200 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Screenshot from 2016-08-19 08-46-52.png
Unknown 151 Carrier repeats every 4 seconds, signal every 5 seconds. Received in New London County. 151.195 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknownsignal1.png
Unknown 154p4635 154 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). kHzKiloHertz (kHz) 10^3 Hz Unk154.4635.png
Unknown 154p46375 Unknown Data type. Repeats every 20 Mins. Location of RXReceive: De Soto, Jefferson County, MO, 63020 Frequency Licensed to Wildwood Lake POA (Jefferson County). 154 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown 155p5 I have found an unknown signal at 155.500 Mhz in germany, Hameln near Hannover. This continuously signal has a bandwidth of 15 kHzKiloHertz (kHz) 10^3 Hz. 155.5 MHzMegaHertz (MHz) 10^6 Hz 15 kHzKiloHertz (kHz) 10^3 Hz Unknown 155p5.jpg
Unknown 155p6 I added the interesting signal's waterfall image and sound and I record it in Turkey, Central Anatolia. I hope it can be solved 155.6 MHzMegaHertz (MHz) 10^6 Hz Unknown 155p6.jpg
Unknown 158 I found this signal on 158.665 MHzMegaHertz (MHz) 10^6 Hz, which according to Industry Canada belongs to our local public works department. 158.665 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown158 Waterfall.jpg
Unknown 161p995 Noisy signal from Italy. 161.995 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown 161p995.jpg
Unknown 163p075 163.075 MHzMegaHertz (MHz) 10^6 Hz 1111.bmp
Unknown 164p3 Unknown Digital Signal IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. File: https://www.dropbox.com/s/tedffkrug9pkbu6/SDRSharp_20171031_182056Z_164373216Hz_IQ.7z?dl=1 164.3 MHzMegaHertz (MHz) 10^6 Hz 15 kHzKiloHertz (kHz) 10^3 Hz Watsignal3.png
Unknown 167 I've recieved this signal at 167,400MHz and recorded it as NFMNarrowband Frequency Modulation (Bandwidth 8000). Location: Madrid, Spain. 167.4 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown 167.png
Unknown 168p900 MHz Some digital signal. Seems to consist of a message and some kind of acknowledge from the receiver (?) 168.9 MHzMegaHertz (MHz) 10^6 Hz 25 kHzKiloHertz (kHz) 10^3 Hz 168p9MHz 4.jpg
Unknown 171.651600 MHz short pulses

Possible solution: ACARS transmissions from/to aircraft

Sound to me as a kind of SCADA
171.652 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz 171p651600.png
Unknown 172.212 this signal was picked-up in the south of France neer Spain.

i was at ~50 km from Mediterranean sea and approximately the same distance from the Canigou mountain.

my antenas are very small so i can tell that the signal was very strong.
172 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 212 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 3 kHzKiloHertz (kHz) 10^3 Hz Sig 1.png
Unknown 173 173.262 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown173 Waterfall.png
Unknown 175p4968 I found this very slow frequency-modulated signal on 175.4968 MHzMegaHertz (MHz) 10^6 Hz. In Belgium, this part of the spectrum is allocated for wireless microphones and audio connections for broadcast services. It might also originate from the Netherlands, as I'm not living far from the border. Every few minutes, the signal shifts up about 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). for a while, before shifting back down. 175.497 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown 175p4968.jpg
Unknown 19.07 MHz Seen around 19 mhz. The signal sometimes has 3 beeps before pulses and has varying intensity. 19.6 MHzMegaHertz (MHz) 10^6 Hz 12 kHzKiloHertz (kHz) 10^3 Hz WaterfallUnknown19mhz.png
Unknown 1p296 unknown noise or signal? 1.297 MHzMegaHertz (MHz) 10^6 Hz Izrezak24.PNG
Unknown 2.42 GHz Captured on a HackRF, 2.42 GHzGigaHertz (GHz) 10^9 Hz band. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Ss (2016-03-05 at 12.25.25).png
Unknown 218.800 This is coming from a wastewater management RTU manufactured by Data Flow Systems. Their systems can use communication protocols such as "Modbus ASCII, Modbus RTU, Modbus TCP/IPInternet protocol, Allen Bradley DF1 Serial, Seiscore, Uniface, Motorola Intrac, TAC II Serial, and TAC II TCP/IPInternet protocol." Unknown type of modulation. 218.8 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz 218mhz.JPG
Unknown 220 Received in New London County. 220.914 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown 220waterfall.png
Unknown 236p16 236.161 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Annotation 2020-03-02 214907.png
Unknown 256.235 UnID signal.png
Unknown 25kHz channel 800 MHz band Strange 25 kHzKiloHertz (kHz) 10^3 Hz wide signal, possible trunking control or data. 850 MHzMegaHertz (MHz) 10^6 Hz 23 kHzKiloHertz (kHz) 10^3 Hz Ss (2016-01-12 at 10.55.58).jpg
Unknown 270p000 Sounds like maybe RTTYRadio TeleTYpe or CWContinuous Wave? But I don't notice long vs short tones, albeit the pitch of the tones changes. 270 MHzMegaHertz (MHz) 10^6 Hz 270 MHzMegaHertz (MHz) 10^6 Hz
Unknown 2m signal Unknown digital signal in the 2m band at several different frequencies 156.9 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz Wave.png
Unknown 33p075 low VHF band data signal Unknown data signal on the low VHFVery High Frequency (30-300 MHz) band 17 kHzKiloHertz (kHz) 10^3 Hz Low vhf wiggles.png
Unknown 3p7875 Heard this 'digital' transmission on the amateur band and wondered what it was 3.788 MHzMegaHertz (MHz) 10^6 Hz 2.5 kHzKiloHertz (kHz) 10^3 Hz Capture3787 2306 121117.JPG
Unknown 40 Hi,I found a strange signal on 40.693mhz, maybe you know what this is and/or could add this to your sample list. It has a bandwidth of about 4000-5000 hz and the low part repeats about every 2,5 seconds, the high part every 5 seconds (as shown in picture 1 rec1.png). Sometimes (2-3 times an hour) this signal has some variations - show in picture 2 rec2.png. I also provided you an audio sample of about 20 seconds, recorded in RAW. Do you know what this signal could be? Its online 24/7 since a month now. regards, Auge 409.6 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown40 Waterfall.jpg
Unknown 40 2 Last Thursday I received some digital signals very close to each other that I have never heard before, it looked like this: http://i.imgur.com/00HQUs3.png and on NFMNarrowband Frequency Modulation it sounded like this: http://picosong.com/PAPC/.It appeared during sporadic E conditions and I heard a lot of people from the UK on the 50MHz band. It could very well be a signal originating from the UK, I received the signal in the south of The Netherlands. 40 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown40 2 Waterfall.jpg
Unknown 40 3 Sounds like a ringing phone. 40.672 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown40 3 Waterfall.jpg
Unknown 405p822 Obvious bursts, unknown modulation. Long burst heard every 5-10 seconds on average. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file in description. First thought is some kind of trunking, as it is very close to the band where trunking radio is usually seen. 405.822 MHzMegaHertz (MHz) 10^6 Hz 1.5 kHzKiloHertz (kHz) 10^3 Hz Unknown 405p822 Waterfall.PNG
Unknown 408p719 Ran rtl-433 analyzer mode over it, got some bitstream output 408.719 MHzMegaHertz (MHz) 10^6 Hz 24 kHzKiloHertz (kHz) 10^3 Hz
Unknown 409 Unknown chirping like sound. Has BPSKBinary Phase-Shift Keying (1 bit per symbol) modulation, ~600 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. 409.6 MHzMegaHertz (MHz) 10^6 Hz Unknown 409.jpg
Unknown 410p0 IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. File & Another recording: https://drive.google.com/open?id=0B1Cfk2C-y-z7aGdmbDd5QVNfNTQ Note that I have no idea what mode to put this in, USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) & LSBLower Side Band Modulation sounded the best, so that's what I used. 410 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 410Scr.png
Unknown 423p15 Unknown at 423.15 MHzMegaHertz (MHz) 10^6 Hz. 423.15 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz Unknown 423p15.png
Unknown 433p120 I found a strange signal on 433.120MHz. Unfortunately I can not read it, so I'm sending it to you. 433.12 MHzMegaHertz (MHz) 10^6 Hz 433.12 MHzMegaHertz (MHz) 10^6 Hz Unknown fast.png
Unknown 433p219 Digital transmission of temperature and status of HOXTER fire-burning control ABRA 6. 433.219 MHzMegaHertz (MHz) 10^6 Hz GQRX Waterfall.png
Unknown 434p050 Appears to be "hammering" (signal interrupted in regular intervals;see iq recording); signal constantly active. 434.05 MHzMegaHertz (MHz) 10^6 Hz 16 kHzKiloHertz (kHz) 10^3 Hz 434p050.png
Unknown 434p450 Maybe FSKFrequency-Shift Keying modulation ?

The transmission is continuous for at least 6-8mn but is not all time continuous (no burst).

Earlier the same day i received the same signal on 434.425 MHzMegaHertz (MHz) 10^6 Hz
434.45 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz 434p450 1.JPG
Unknown 434p620 Posting on behalf of user IfoR. Possible key fob? no description was given. 434.62 MHzMegaHertz (MHz) 10^6 Hz Waterwall.png
Unknown 435p150 Trunking Please help identify this trunk
Unknown 441p660 Seems to have disappeared as of writing this edit. Croatian allocation tables point to it being radiolocation. 441.66 MHzMegaHertz (MHz) 10^6 Hz Unknown 441p660.png
Unknown 443p685 Most likely PMR or PAMR according to Croatia's frequency allocation table. 443.685 MHzMegaHertz (MHz) 10^6 Hz Unknown 443p685.png
Unknown 443p886 443.886 MHzMegaHertz (MHz) 10^6 Hz Unknown 443p886.png
Unknown 443p936 443.936 MHzMegaHertz (MHz) 10^6 Hz Unknown 443p936.png
Unknown 445 Unknown. Sent from video clip. 445.363 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown445 Waterfall.png
Unknown 446 I've found a strange signal on 446 MHZ Band in Italy, it seems like a multi channel signal (maybe RTTYRadio TeleTYpe?). I'm attaching an image and a 2 seconds IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. sample. 446 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown446 Waterfall.jpg
Unknown 449p936 Some sort of status check between two devices? IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file and detailed pic in the description. 449.936 MHzMegaHertz (MHz) 10^6 Hz 7.5 kHzKiloHertz (kHz) 10^3 Hz Signal 449MHz.png
Unknown 451p4500 Intermittent digital, and occasionally morse code, possibly trunked? 450 MHzMegaHertz (MHz) 10^6 Hz — 470 MHzMegaHertz (MHz) 10^6 Hz Unidsmartmeter.png
Unknown 452p862 452.863 MHzMegaHertz (MHz) 10^6 Hz 1.99 kHzKiloHertz (kHz) 10^3 Hz Unknown 452p862.png
Unknown 455 455 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown455 Waterfall.png
Unknown 458p208 Transmitted all the time at roughly 458.208 MHzMegaHertz (MHz) 10^6 Hz (center frequency), in four distinct frequencies separated by about 12.5 KHzKiloHertz (kHz) 10^3 Hz. Each of the signals is roughly 5 KHzKiloHertz (kHz) 10^3 Hz in bandwidth. The signals are received in Portugal near Lisbon. 458.208 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown 458p208.jpg
Unknown 462.125 12.5 kHzKiloHertz (kHz) 10^3 Hz 462.125.PNG
Unknown 464.75 MHz Common signal found throughout Michigan. Can have various rhythms. Did find out on KB9KUD that this type used for updating transmitter data... 460 MHzMegaHertz (MHz) 10^6 Hz — 940 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz 464.75 MHz transmission waterfall.PNG
Unknown 465p925 possible bus Possible bus stop wireless system? 465.925 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz Unk BUSpossible 20151111 102834Z 465925088Hz AF.jpg
Unknown 467p260 Found at 467.260 MHzMegaHertz (MHz) 10^6 Hz. First thought to be packet radio but it isn't. 467.26 MHzMegaHertz (MHz) 10^6 Hz
Unknown 468p003 Message coded on 3 to 8 tones. Frequencies changing randomly. Transmitting continuousely 468 MHzMegaHertz (MHz) 10^6 Hz — 468.005 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 468.003MHz-Moving.png
Unknown 469 Found on 469.975 FMFrequency Modulation on my ICOM HT can't get waterfall cause I don't have my RTL-SDR here. When I'll have a better recording I'll send it. It sounds like the portable traffic lights but it not the same... 469.975 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown 47p980 I was browsing on my SDR when i found this weird signal. It sounds like radar 47.98 MHzMegaHertz (MHz) 10^6 Hz Weird sig.PNG
Unknown 487p001 487.001 MHzMegaHertz (MHz) 10^6 Hz 2015-05-29 21-56-04.png
Unknown 504p690 IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. FILE IN DESCRIPTION Signal which looks like a very wide 4MSK, but also has some tones to either side of the 4 main tones. Seen at 22:38 AEST, but not at 22:42 AEST. 504.625 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown 504p690 Screenshot.PNG
Unknown 550 Unknown FSKFrequency-Shift Keying? 550.06 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown550 Waterfall.jpg
Unknown 648 Frequency shifting. Received in New London County. 648.01 MHzMegaHertz (MHz) 10^6 Hz 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown 648waterfall.png
Unknown 6p232 6.232 MHzMegaHertz (MHz) 10^6 Hz 2222.bmp
Unknown 70.208.150 70.208 MHzMegaHertz (MHz) 10^6 Hz 70.208MHz.JPG
Unknown 75p219 Croatian allocation tables point to it being aeronautical radionavigation. Appears every 10 seconds or so. 75.219 MHzMegaHertz (MHz) 10^6 Hz 16 kHzKiloHertz (kHz) 10^3 Hz Unknown 75p219.png
Unknown 78.815 78.815 kHzKiloHertz (kHz) 10^3 Hz 14 kHzKiloHertz (kHz) 10^3 Hz 78815USB.png
Unknown 7p1076 Sounds like an OTHR, but very short bursts? 7.108 MHzMegaHertz (MHz) 10^6 Hz 2.5 kHzKiloHertz (kHz) 10^3 Hz Unknown 7p1075m.JPG
Unknown 7p585 Possibly OTHOver The Horizon (very long range) radar. 7.585 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Sd.png
Unknown 8 kHz This signal occurs many times in a day, at irregular intervals. The shape is always the same, but the length of the center line can vary. kHzKiloHertz (kHz) 10^3 Hz 300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 8-khz.jpg
Unknown 83 Unknown 83.7 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown83 Waterfall.jpg
Unknown 855p537 Chirp Chirp. Possible FSKFrequency-Shift Keying. No other information. IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file provided. 855.537 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz CHIRP unk.jpg
Unknown 856 The antenna has a Yagi pointed to West from 23.5° South latitude, 47.46° West longitude. The signal can be local or from the sky. The signal is horizontal polarized. 856 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown856 Waterfall.jpg
Unknown 85p4748 I can see the exact same signal with RTL-SDR, HackRF, Airspy, with different computers, so I am ruling out a birdie. The break every 6 seconds is what makes this signal stand out, as something oddball. 85.475 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown withgaps.PNG
Unknown 86p137 This signal is emitted constantly every 5 seconds approximately. The power varies constantly. 86.137 MHzMegaHertz (MHz) 10^6 Hz 30 kHzKiloHertz (kHz) 10^3 Hz 28 09 2016 86.137 NFM.png
Unknown 877p5 Possibly a 3G WCDMA signal, although a bit wider than expected. 887.6 MHzMegaHertz (MHz) 10^6 Hz MHzMegaHertz (MHz) 10^6 Hz Wikipiceclr.png
Unknown 940.113 Found in Southern Maryland, 30 minutes from Washington, DC 940.113 MHzMegaHertz (MHz) 10^6 Hz 17.1 kHzKiloHertz (kHz) 10^3 Hz 940114.PNG
Unknown 941p33 941.33 MHzMegaHertz (MHz) 10^6 Hz 12.5 MHzMegaHertz (MHz) 10^6 Hz 941.33mhz.png
Unknown 960.825 - 960.850 Unknown Signal, no idea what it could be 906 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 25 kHzKiloHertz (kHz) 10^3 Hz 906.850.PNG
Unknown @73.728 Mhz Received on Funcube Pro+ with standard VHFVery High Frequency (30-300 MHz) TV antenna pointing due West. Sound is on 73.7267 MHzMegaHertz (MHz) 10^6 Hz and does not vary over time. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 10.07 kHzKiloHertz (kHz) 10^3 Hz No Audio File 73.728 Mhz 2020-06-22.jpg
Unknown Chirping 2 Continuous bursts. Audio sample recorded in NFMNarrowband Frequency Modulation. Comment: Transmitted by a company that has water purifiers near my city. I know because i’ve done 2 stages in this company and i’ve seen the radio. It should recive the water level from the tanks and other things. 162.863 MHzMegaHertz (MHz) 10^6 Hz — 936 MHzMegaHertz (MHz) 10^6 Hz UnknownChirp2 Waterfall.png
Unknown DMR Signal an unidentified DMR signal , transmitting continously with nearly constant intervals , each cycle is around one second , DSD+ shows it as Tier3(TIII) but no sound even when there is an acvtivity , the signal is not encrypted 450.175 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz 450175.png
Unknown Data Chirping Continuous signal. Audio sample recorded in NFMNarrowband Frequency Modulation. 152.652 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). UnknownDataChirp Waterfall.png
Unknown Data Transmission Unable to identify this transmission. It was found in Hawaiian airspace operating on band reserved for military transmissions. Some sort of FSKFrequency-Shift Keying? Bears resemblance to Unknown 707. 375 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Radio.png
Unknown FSK 434.325M 434.325 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz 434325000.jpg
Unknown FSK Blips I see what looks like some sort of AFSKAudio Frequency-Shift Keying all over 454MHz (looks like several channels of it). Most of the time it's the short bursts as can be seen in the waterfall, but occasionally it breaks out into a much longer ramble. It also sounds as though the carrier drifts up and down a bit during these longer bursts. In AMAmplitude Modulation or FMFrequency Modulation, it just sounds like someone keying a mic every second, but on sideband it sounds much more interesting, like the attached file. Cheers 454 MHzMegaHertz (MHz) 10^6 Hz Fskblips.png
Unknown Ham Signal All found on the 20m band. Radio frequency's are 14.109, 14.166, 14.224, and 14.340. I'm in the Los Angeles, California area. 14.109 MHzMegaHertz (MHz) 10^6 Hz — 14.34 MHzMegaHertz (MHz) 10^6 Hz Sig video.png
Unknown Heli Submitted on behalf of Willone2. Some sweeper 6.31 MHzMegaHertz (MHz) 10^6 Hz Heli.png
Unknown Helix Helix shape possibly due to under sampling in the waterfall display? 456.368 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown Helix.JPG
Unknown MFSK on 128KHz A very strong MFSKMultiple Frequency Shift-Keying-like signal 118 kHzKiloHertz (kHz) 10^3 Hz — 128 kHzKiloHertz (kHz) 10^3 Hz 16 kHzKiloHertz (kHz) 10^3 Hz MFSK.PNG
Unknown Marine Band 157.740 157.74 MHzMegaHertz (MHz) 10^6 Hz, 157.74 MHzMegaHertz (MHz) 10^6 Hz
Unknown NFM Squelch system Very low hum, not a constant tone. Repeating pulses, and pulses seem to differ between different NFMNarrowband Frequency Modulation channels of the system being used. Possible squelching, XTCSS? 855.112 MHzMegaHertz (MHz) 10^6 Hz — 855.362 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz Unk sqlench.jpg
Unknown Numbers Station 4p723 Numbers station heard 12:26 AMAmplitude Modulation AEST on 2015-01-19. Delivers a stream of numbers and letters in phonetics. Begins with "All stations, all stations, this is ?". Finishes with "This is ? out". Cannot hear it myself - anyone else have better ears? 4.723 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Unknown Numbers Station 4p723 Waterfall.PNG
Unknown Out of Band ISM 'Out of Band (Australia)' Unidentified digital wideband signal seems to have origins in the US ISM band - Shouldn't be below 915MHz Downunder! 900 MHzMegaHertz (MHz) 10^6 Hz 10 MHzMegaHertz (MHz) 10^6 Hz Echuca 9V1 FFT Screen.jpg
Unknown Pager Sounds like a pager system 471.688 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz Unknown pager.png
Unknown Pear Here was a pear shape happened 3 times tonight.Sorry to say I didn`t get the audio. I was lucky to get 2 images. Unknown pear 1.png
Unknown Pulse Tones - 3012.001 MHz 2019-06-14 01:02 UTC

Detected several pulse tones from an unknown signal in SHF range 3011.999 to 3012.001 MHzMegaHertz (MHz) 10^6 Hz.

Captured signal via HackRF located in San Antonio, Texas, United States.
3,011.999 MHzMegaHertz (MHz) 10^6 Hz — 3,012.001 MHzMegaHertz (MHz) 10^6 Hz 2.4 kHzKiloHertz (kHz) 10^3 Hz Gqrx wf 20190614 011628.png
Unknown Pulsing Periodic pulses. Sound sample recorded in USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) mode. Possibly a GlobeWireless signal. MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). UnknownPulsing Waterfall.png
Unknown Pulsing Signal An overpowering signal at 149.5mhz in North Potomac, Maryland, USA 149 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 150 MHzMegaHertz (MHz) 10^6 Hz SS.PNG
Unknown Pulsing Sound 462 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 350 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unknown Pulsing Type of Signal 7.404 kHzKiloHertz (kHz) 10^3 Hz — 7.438 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Capture3.PNG
Unknown RADAR Near Toronto Canada I found this RADAR signal in the expected band, however all other nearby RADAR units were already identified. This one is unknown, and uses a novel inter-pulse modulation scheme and seemingly random or pseudo-random pulse train and pulse coding. 1,350 MHzMegaHertz (MHz) 10^6 Hz MHzMegaHertz (MHz) 10^6 Hz HACKRF POSSIBLE UNLICENCED RADAR.jpg
Unknown Radar I often see this signal, and it lasts for literal hours. It sounds very similar to a microwave running, and looks as if Kontayner had a little brother. It's a strong signal, but not as strong as the PLUTO radar. 4.41 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Screen Shot 2015-10-02 at 6.56.53 PM.png
Unknown Ringing Repeats every minute. 154.646 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). UnknownRinging Waterfall.jpg
Unknown Signal Unknown signal in Yangon Region at Yangon(Burma). 363.007 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz Screenshot at 2022-06-15 18-11-22.png
Unknown Signal 433p5MHz The signal repeatedly appeared and disappeared ever few minutes. It might be from a mixer trucke, that was in front of my window. 433.5 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz 433500000.png
Unknown Signal 940.863 MHz Digital BOS Radio system transmissions from Germany. 940.863 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz Unknown 940.8mhz.png
Unknown Signal @ 940.113.970 MHz Found fairly close to the other one I found, I'm going to say that this is probably some type of pager 940.113 MHzMegaHertz (MHz) 10^6 Hz 22.28 kHzKiloHertz (kHz) 10^3 Hz Unknown signal @ 940.113.PNG
Unknown Signal at 695 MHz Please find signal IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. file at : https://1drv.ms/u/s!AvlNmSqrGlNVgWol9WapK9zRMIJu 695 MHzMegaHertz (MHz) 10^6 Hz
Unknown Signal at 7443 mhz unknown signal sounds like spaceship 7.443 kHzKiloHertz (kHz) 10^3 Hz kHzKiloHertz (kHz) 10^3 Hz 7443x.jpg
Unknown Telemetry 465.188 MHzMegaHertz (MHz) 10^6 Hz 12.5 MHzMegaHertz (MHz) 10^6 Hz 465.1883.png
Unknown Ticking 868.33 MHzMegaHertz (MHz) 10^6 Hz Ticker.png
Unknown Trunking Sounds like Motorola Type II smartnet, but Unitrunker does not recognize. 452.325 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). UnknownTrunking Waterfall.png
Unknown Trunking or Telemetry Control channel for a logic trunked radio system. 148 MHzMegaHertz (MHz) 10^6 Hz — 170 MHzMegaHertz (MHz) 10^6 Hz 12 kHzKiloHertz (kHz) 10^3 Hz LogicTrunkedRadio Waterfallthmb.jpg
Unknown UHF Satcom Signal So I've come across this signal twice now - the first time I assumed it might've been an anomaly however it's popped up again and this time stronger and with similar signals nearby. I've seen it between 250 and 270 MHzMegaHertz (MHz) 10^6 Hz on it's own and next to the same type of signal but with different "waves" in the transmission. It sits right next to the classic UHFUltra High Frequency (300-3000 MHz) satcom signals however this one has obvious differences. Unsure what modulation it is. The first thing I thought of was some kind of radar but I don't know of any in this band. 251 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 30 kHzKiloHertz (kHz) 10^3 Hz Unk 3.PNG
Unknown UHF in SARSAT Band 406.05 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz UHF 406p05MHz.jpg
Unknown VHF burst This is a signal I couldn't identify. I got two bursts and took away the noise between them in Audacity so they'd play back-to-back. 159.18 MHzMegaHertz (MHz) 10^6 Hz 159180khz.png
Unknown at 164.650MHz Possibly some kind of radio trunking. 164.65 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz WFall.png
Unknown blips 447p325 Always active, seems to come from multiple sources as blips. Telemetry of some sort? 447.325 MHzMegaHertz (MHz) 10^6 Hz 20 kHzKiloHertz (kHz) 10^3 Hz 447p325.png
Unknown chirps lot of tone chirps 750 MHzMegaHertz (MHz) 10^6 Hz. submitted by user Mitchy93 750 MHzMegaHertz (MHz) 10^6 Hz 15 kHzKiloHertz (kHz) 10^3 Hz Chirps.PNG
Unknown codar This signals looks and sounds exactly like CODAR. It has a higher sweep rate than the one on 13500kHz 26.2 MHzMegaHertz (MHz) 10^6 Hz 150 kHzKiloHertz (kHz) 10^3 Hz Dsfs.png
Unknown digi mode An unknown digital mode consisting of maybe PSKPhase-Shift Keying and freq hopping FSKFrequency-Shift Keying bursts within the signal. No one at the moment know what it is. Went off the air around 21:45 UTC on 8/14/17. further observation concludes that it might be on a steady schedule. Don't know when it first went on air. ( MORE UPDATES IN THE PAGE) 6.903 kHzKiloHertz (kHz) 10^3 Hz — 11.017 MHzMegaHertz (MHz) 10^6 Hz 3.5 kHzKiloHertz (kHz) 10^3 Hz Unkown sig.PNG
Unknown digital 461p185 461.185 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz
Unknown digital signal in italy 446.524 MHzMegaHertz (MHz) 10^6 Hz — 447.275 MHzMegaHertz (MHz) 10^6 Hz 150px
Unknown lf strong signal 82 kHzKiloHertz (kHz) 10^3 Hz kHzKiloHertz (kHz) 10^3 Hz In tx.jpg
Unknown marine VHF 161.300 Sounds like FSKFrequency-Shift Keying every minute in marine VHFVery High Frequency (30-300 MHz) band near north west coast of France 161.3 MHzMegaHertz (MHz) 10^6 Hz 12 kHzKiloHertz (kHz) 10^3 Hz Screenshot-2016-05-29-193825.png
Unknown military airwaves signal 334.520 MHz Observed and recorded 23 June 2022 02:00-03:00 PST (23 June 2022 09:00-10:00 UTC) 334.52 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 334.52 MHz unidentified signal.png
Unknown modulating carrier and sidebands Pulsing signal at 228 MHzMegaHertz (MHz) 10^6 Hz, with sidebands spaced at 22.75 kHzKiloHertz (kHz) 10^3 Hz. Carrier appears to pulse at ~1.33 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 140 kHzKiloHertz (kHz) 10^3 Hz
Unknown moving signal i dont know what is this,its moving to another frequencies slowly, so i can follow the signal, sometimes its weak becouse im changing my antenna position for better results, signal is being really strong if i change antenna's position to moon(i know this signal cant came from moon, and i hope)i dont know the frequency range becouse i closed app while receiving i dont wanted to listen whole signal(start:2750kHz stop:i dont know but i think 5MHz or little bit more) 2.75 MHzMegaHertz (MHz) 10^6 Hz 2.8 kHzKiloHertz (kHz) 10^3 Hz
Unknown noise signal in 19m broadcast band Strange noisy signal on 19 meter broadcast band 15.16 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz 15161.3+-31.2KHz.jpg
Unknown paging 940p862 Unknown paging signal, similar to FLEX in preamble tone but doesnt decode as FLEX. 1600Bd, possible PSKPhase-Shift Keying. 940.862 MHzMegaHertz (MHz) 10^6 Hz 12 kHzKiloHertz (kHz) 10^3 Hz Unk pager 940.jpg
Unknown pulses Hi. an unknown irregular pulses transmitting on 36.941 Mhz 24/7. Received by a RTL-SDR and a simple 10 meter long wire. signal is powerful all the time. 36.941 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz Capture1.PNG
Unknown signal at 444p019143 I'm new to radio and I've just found this signal. There are a few similar other signals around this one. 444.019 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz SDRSharp 20160520 144330Z 444019143Hz AF.png
Unknown signal between 424.000MHz and 425.000MHz Unknown signal in Belgium between 424 and 425MHz. Permanent data stream. 424.513 MHzMegaHertz (MHz) 10^6 Hz — 424.8 MHzMegaHertz (MHz) 10^6 Hz 15 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Waterfallbetec22112017.png
Unknown signal via 464.6 MHz This is actually a time signal listed to a time code company in GR but the form of modulation is confusing.... 464.6 MHzMegaHertz (MHz) 10^6 Hz 5.4 kHzKiloHertz (kHz) 10^3 Hz Timesignal1.PNG
Unknown tone on MURS 154.600 Unknown tones appearing on MURS 154.6000MHz. Numerous videos and a post on RadioReference.com show listeners in different parts of the country have also heard the same tone on the same frequency. 154.6 MHzMegaHertz (MHz) 10^6 Hz 154 600.png
Unknown trnking unknown trunking channel signal 173 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz NXDNTrunking Waterfall.png
Unknown trunk Unidentified (Police?) trunked radio signal in Santa Rosa, CA HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). No Audio File 150px
Unknown trunking or data Unidentified data signal, possibly trunking 131.188 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz 133187500 strangetrunking.png
Unknown-1536125 This signal continuously broadcasts in short blips. 151.782 MHzMegaHertz (MHz) 10^6 Hz — 469.761 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz 153 612 500-WF.png
Unknown-162 Signal was captured in Belarus(near Russia border). It is emitting everytime. Maybe this is airport signals... 162.3 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz 162-343.jpg
Unknown72p00Mhz A repeating short data transmission. 72 MHzMegaHertz (MHz) 10^6 Hz — 72.36 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz
Unkown 0p012 Unknown VLFVery Low Frequency (3-30 kHz) signal ~12.5 kHzKiloHertz (kHz) 10^3 Hz. Interference every 10-30 minutes: 2-3 ~12.5 KHzKiloHertz (kHz) 10^3 Hz tones, separated by approximately a second. 12.5 kHzKiloHertz (kHz) 10^3 Hz 24 kHzKiloHertz (kHz) 10^3 Hz UNKWN 00p012.png
Unkown 13p559 USB Mode This signal appears at night and disappears in the morning in China. It's strong and no one knows what it is for. 13.559 MHzMegaHertz (MHz) 10^6 Hz 1.25 kHzKiloHertz (kHz) 10^3 Hz Snipaste 2023-10-21 05-58-06.png
Unkown 156p00 I think this is a pager signal, but would like to know what type of signal it is please 156 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Unkown 707p999 FSK 707.999 MHzMegaHertz (MHz) 10^6 Hz 11 kHzKiloHertz (kHz) 10^3 Hz 707.999 - FSK- USB - 11k.png
Unkown Periodic Signal Unknown periodic signal around 94.5 kHzKiloHertz (kHz) 10^3 Hz 94.5 kHzKiloHertz (kHz) 10^3 Hz 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown Periodic Signal @94kHz.png
Unkown Periodic Signal Unknown periodic signal around 94.5 kHzKiloHertz (kHz) 10^3 Hz 94.5 kHzKiloHertz (kHz) 10^3 Hz 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown Periodic Signal @94kHz.png
Unkown patteren at 434.750 MHz signal seems to be in some sort of patteren but it's isn't regular sometimes it stops and continues again after a while. while it pauses you can also faintly hear another signal at the smae time. the audio recorded was in RAW mode 434.75 MHzMegaHertz (MHz) 10^6 Hz 20-53-08 Unknown 434750 MHz.png
VC02 voice Morse code station Chinese VC02 voice Morse code station. This station transmits voice Morse code messages by vocalizing the "dits" and "dahs." 9.962 MHzMegaHertz (MHz) 10^6 Hz 0000.jpg
Very weird signal in the VHF band Found this extremely odd, almost constant signal in the VHFVery High Frequency (30-300 MHz) band next to the fire/police dispatch channels. Dont know the purpose, or protocol at all. 151.01 MHzMegaHertz (MHz) 10^6 Hz 6.7 kHzKiloHertz (kHz) 10^3 Hz Weird signal in vhf band.PNG
WLAN Interfering with Bluetooth A WLAN signal interfering with a Bluetooth signal.
WOMEX Found on the 20 meter amateur band in Hayward, CA as seen on an ICOM 7300 14.15 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz WOMEX.jpg
Water Tower Com to water pumps Telemetry data for water pumps & water towers for water distribution. 447.238 MHzMegaHertz (MHz) 10^6 Hz — 457.438 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz Watertx2.png
Water plant telemetry It is received all over Hungary, on many frequencies in the given range. Some of them are simplex, some half-duplex. It's telemetry from water plants/pumps/etc. They are working with 10 or 10+ element yagi antennas. 440 MHzMegaHertz (MHz) 10^6 Hz — 460 MHzMegaHertz (MHz) 10^6 Hz 12 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 5 kHzKiloHertz (kHz) 10^3 Hz Screenshot 3.jpg
Weird Signal at 6912.43 This looked like a STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). signal but when I went to investigate further it sounded like a STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). on LSD. 6.912 kHzKiloHertz (kHz) 10^3 Hz Weird signal at 6912.43 pic.PNG
Weird Signal on Multiple Frequencies For some reason I've been scanning frequencies and this has come up on about 10 of them. Anyone know what this is? HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). [[Image:Weird Signal in Action.PNG|150px]]
Weird moving signal Found this signal while just scanning around. Original thought it could be something to do with the local airport, such as radar or something. But this signal has only appeared in the last couple of days. 117 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Weird signal.png
Weird pulsing Just found this while i was looking through a WebSDR (http://websdr.ewi.utwente.nl:8901) 13.55 MHzMegaHertz (MHz) 10^6 Hz S.PNG
Weird signal on 10321.5 khz 2.5 kHzKiloHertz (kHz) 10^3 Hz 10321.5 khz USB 2.png
Weird signal on military frequency I found this weird signal, bouncing around the frequency. Anyone know what this is? 232.56 MHzMegaHertz (MHz) 10^6 Hz Weired.jpg
Weird spikes Odd spikes found when scanning 888 MHzMegaHertz (MHz) 10^6 Hz — 893 MHzMegaHertz (MHz) 10^6 Hz 24.5 kHzKiloHertz (kHz) 10^3 Hz 150px
Wide signal at 443.5 MHz 443.5 MHzMegaHertz (MHz) 10^6 Hz 125 kHzKiloHertz (kHz) 10^3 Hz 443p5unid.png
Wideband noise centred on 14030kHz Wideband noise, 15dB above usual noise floor, centred on 14.030 MHzMegaHertz (MHz) 10^6 Hz and repeated every 400 kHzKiloHertz (kHz) 10^3 Hz for dozens of MHzMegaHertz (MHz) 10^6 Hz either side of main signal. It is there 24/7 and only received when antenna connected to SDR . 14.03 MHzMegaHertz (MHz) 10^6 Hz 30 kHzKiloHertz (kHz) 10^3 Hz Noise on 20m.JPG

List of Unknown Signals in Database


Comments

Feel free to make comments about unidentified signals that you might know or anything else here.


Linkz

3180 days ago
Score 1+-

Hello guys I solved some unid HFHigh Frequency (3-30 MHz) signals of the DB today:

Unknown 6-channel VFTVoice Frequency Telegraphy = overmodulated US-MIL RATT

Unknow 13p559 = frequency of the ISM band, random industrial QRM, impossible to identify as its QRM only

Unidentified 13p045 kHzKiloHertz (kHz) 10^3 Hz = CISCommonwealth of Independent States (CIS), the former Soviet Republic-12 (mistuned)

Unknown CISCommonwealth of Independent States (CIS), the former Soviet Republic PSKPhase-Shift Keying = Russian INTEL psk


Regards

linkz

Cartoonman

3178 days ago
Score 0+-
Thanks for the ids! I'm a little busy currently but i'll incorporate your changes into the signals as soon as I get a chance!

Linkz

3147 days ago
Score 0+-

Hi,

FSKFrequency-Shift Keying Beacon on HFHigh Frequency (3-30 MHz)?? = Chinese MIL datalink Unid psk signal narrowband = Australian MHFCS data stream Unidentified hf digital -> add a comment about Link-11 variants

Regards

linkz

Cartoonman

3147 days ago
Score 0+-
Thanks, I commented on them. Moved unid psk signal narrowband into signal page as Australian Military ISBIndependent Side Band Modulation Modem.

Tape

3144 days ago
Score -1+-

"Anyone can edit a signal page by clicking the "edit with form" at the top of the page."

I was going to identify some signals, but since your completely incompetent arse can't deliver what you promise, I'll refrain from helping. (can't edit)

Cartoonman

3144 days ago
Score 0+-
What was the issue? There's two ways one can edit a page. One is using the form. The other is by using edit. If you can explain the specific issue you faced when trying to edit the page, we can fix the issue.

Admin

3143 days ago
Score 0+-

Yes please explain the issue so we can fix it. Everything appears to be working fine at the moment on my end.

Or are you trying to click the edit button on the main page? You need to click edit on a signal page to edit it.

Anonymous user #1

1947 days ago
Score 0+-
Editing,identification and COMMENTING on these signals needs to be extremely easy, the people that actually know what they are could care less about forms and logins

Anonymous user #2

3141 days ago
Score 0+-
Any info on 1536125? - LargeVirus

Cartoonman

3140 days ago
Score 0+-
I dont have anything that would be useful for that one :/. It could be some packet-switched pager, or telemetry. Might even be one of those suggested signals, but I'm just guessing. Probably FSKFrequency-Shift Keying based.

Avsa242

3123 days ago
Score 0+-
When I originally posted this one, I checked on the FCC's license search, and both frequencies are assigned to water towers near my area, so I'm guessing the data has something to do specifically with that.

Avsa242

3123 days ago
Score 0+-
UNID Telemetry http://www.s...ID_Telemetry - minimodem consistently decodes some of this to plaintext ASCII (minimodem --rx 1200). 0:20 looks like some sort of periodic TXTransmit test (12345qrstuvwxyz). It doesn't sound exactly like the standard tones used in, e.g., APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area though, so I'm sure some settings could be tweaked a bit.

Cartoonman

3112 days ago
Score 0+-
interesting, how did you decode the FSKFrequency-Shift Keying? some sort of generalized FSKFrequency-Shift Keying decoder?

Anonymous user #3

3104 days ago
Score 0+-
Unknown 409 bears a strong resemblance to MPT1317. It uses exactly the same modulation and coding as MPT1327 except that multiple base stations share the same frequency hence the stopping and starting of the data bursts at regular intervals at different signal strengths.

Cartoonman

3101 days ago
Score 0+-
I will definitely look into this, thanks for your observations!

Cartoonman

3084 days ago
Score 0+-
I looked into it and it doesnt seem to be similar enough, unknown 409 looks to have a PSKPhase-Shift Keying modulation thing going on, but it doesnt seem to be MPT.

Avsa242

3103 days ago
Score 0+-

Cartoonman,

Yes - there's a great little piece of software called minimodem (lives at http://www.w...m/minimodem/). It allows you to "receive" or "transmit" AFSKAudio Frequency-Shift Keying at any arbitrary bitrate via your soundcard. You can fiddle with all sorts of settings like mark and space tone values, start and stop bits, and a bunch more- pretty neat.

Avsa242

3102 days ago
Score 0+-
I *think* Unknown Sinal 280 (http://www.s...wn_Sinal_280) is iDEN (http://www.s...twork_(iDEN) ). I see the same spectrum and hear the same sound (sounds virtually the same as the background noise) on 770-something MHzMegaHertz (MHz) 10^6 Hz; occupies the same amount of spectrum, about 18-19kHz.

Avsa242

3102 days ago
Score 0+-
I posted Unknown FSKFrequency-Shift Keying Blips (http://www.s...wn_FSK_Blips) a long time ago. I think these are just some sort of idling signal sent by mobile units, as sometimes the air breaks and a National Grid tech will be talking on it.

Cartoonman

3101 days ago
Score 0+-

@Avsa242: Thanks! I'll definitely play around with minimodem. I long suspected Unknown Sinal 280 to be IDEN but i just never saw my local iDEN have those bursts like that. I'm 90% certain though that it is iDEN of some sort.

The idling sequence for some radios are pretty interesting. I haven't seen a FSKFrequency-Shift Keying-based idle before. These continued bursts are definitely characteristic of an idling radio maintaining channel presence for other radios to know if they're in range and available to take a call. It would be very hard to make an article on 'idling radios' since they all seem to have their own format. the digital radios like P25 have their own, so do DMR and MotoTRBO. Analog just keys on in bursts.

Anonymous user #4

3100 days ago
Score 1+-
Unknown MPT1327-Like signal appears compound modulated, i.e. FMFrequency Modulation or AMAmplitude Modulation. I will try and download it and look at it later. I suspect an underlying BB containing a V-series modem.

Anonymous user #5

3092 days ago
Score 0+-

Unknown 16p4732 PSKPhase-Shift Keying Serial is a STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO).-4285. ACFAutoCorrelation Function 106.66mS and waterfall fit fine.

Best regards.

ANgazu.

Cartoonman

3087 days ago
Score 0+-
спс ANgazu!

Anonymous user #6

3083 days ago
Score 0+-
My best guess for the signals in 'Unknown 161p995' is AIS. (Ch A @ 161.975Mhz , Ch B @ 162.025Mhz)

Anonymous user #7

2996 days ago
Score 0+-
The 27Mhz Happy New Year and Human Voice is no doubt 11 meter illegal CB radio operators doing their usual.

Cartoonman

2995 days ago
Score 0+-
if only we could name signals 'CB Shenanigans' eh? :^)

Anonymous user #8

1581 days ago
Score 0+-
It's also Christmas music.

Anonymous user #9

2975 days ago
Score 0+-
"Unidentified" 158.09 is POCSAG paging on 158.1, very common

Cartoonman

2974 days ago
Score 0+-
I agree, definately looks like it. Do you happen to have an IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. recording or audio sample of it? The frequency sweep intro and end look interesting, none of the POCSAG's near me have that.

Anonymous user #10

2968 days ago
Score 0+-
THAT IS ASTOUNDING! Your "Unknown Pear 1" signal is PRECISELY what one would expect to see as the emissions from the startup sequence of nuclear fusion reactor using magnetic confinement, the emission would reflect the design of the reactor chamber in the sense that the chamber (acting as a resonate cavity) would be make radio emission at frequency in maybe few dozen Mcs according to the dimension of chamber inner wall and dimension of outer high-mu electromagnet poles these are used for the magnetic confinement of plasma, and oscillate from confine to release to allow more fuel and exhaust output, these type of reactor make electric current in AC from magnetic feedback from reacting plasma, then cycle repeat, at resonate frequency of chamber. These reactor ONLY has one maker and purpose, it is made in USA and Russia only and made for propel electric spy plane, population mistake for UFO of course, but line straight across USA make for medium altitude pass for picture of secret sights, only then electric spy plane make up angle and start fusion plant accelerate to ~12000 kph return to orbit. These is not new, gas rocket or jet engine spy plane SR-71 had partial version of electric propel but no fusion device SR-71 make retirement now because on the 1990 this become active make your SR-71 obsolete and new CHINA electric spy plane only pass over short altitude, make mistake for alien UFO

Cartoonman

2968 days ago
Score 0+-

That's very interesting!. I presume these reactors are part of things like reported here: http://www.b...sion-reactor

I'll take a look into this and transfer Unknown Pear to identified Signals soon. Thanks!

LV

2864 days ago
Score 0+-
as this is on the ham bands - it is most likely only one of those transmissions where people use some software (forgot which) to make images and spell out things on people using sdr with waterfall's screens

Anonymous user #8

1581 days ago
Score 0+-
I only wish your comments were relevant.

Anonymous user #11

2794 days ago
Score 0+-
The 160m one is stanag.

Cartoonman

2794 days ago
Score 0+-
I verified the baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate and it is 2400, the same as stanag. It doesn't do well on the phase plot though, but thats because of severe multipath interference. Thanks!

9A3CBX

2750 days ago
Score 0+-
7p585 is most likely an OTHOver The Horizon (very long range) radar or something used for research of oceans/ionosphere, agree? Correct me if I'm wrong.

Cartoonman

2750 days ago
Score 0+-
Yes, it is definitely a type of radar. As to what specific one it falls under is still a mystery. A possible candidate given the waterfall is http://www.s...twork_(JORN). But I have seen other unidentified signals with that tone in front.

Ywsia1

2691 days ago
Score 0+-
See now what I dont understand is why wouldnt they be able to create Minimodem for windows.....? I want minimodem!! FOR MY OS!!

Cartoonman

2691 days ago
Score 0+-
If its open source, you could compile it for windows binary

Jks

2690 days ago
Score 0+-
"Unknown 0p006592" is Moscow time-signal station RBU (see Wikipedia for more info). You can hear it very clearly at the KiwiSDR in Moscow run by RZ3DVP http://rz3dvp.ru:8073/

Anonymous user #12

2601 days ago
Score 0+-
4p723 is eam for usa airorce sending messages as its on alot of frequencies like 15016khz

Ywsia1

2582 days ago
Score 0+-
Hey has anyone ever gotten around to solving my 464.75 MHzMegaHertz (MHz) 10^6 Hz pulsing with the rhythmatic bursts?

Anonymous user #13

2467 days ago
Score 0+-
Signal Repeated tone is a type of SCADA telemetry associated with utilities usually water treatment plants. It used to be country wide unntil most adopted other digital methods.

Anonymous user #13

2467 days ago
Score 0+-
unknown trunking or data signal is a type of SCADA associated with substations. The constant data bursts are updates on the status of the substation.

Ywsia1

2413 days ago
Score 0+-

Please add that to the 'SCADA' section of this wiki.

I have also found a signal that I had listened to at least 4 times before, the transmitter is somewhere in Illinois, and has a TONS of AFSKAudio Frequency-Shift Keying modulations, but there is a slight problem. I can only receive it from my radio scanner... I do not have the time and money to bring my SDR to Chicago to receive this extremely rare almost APOC signal, AFSKAudio Frequency-Shift Keying modulated of course... usually not around anymore.... I will post to this wiki as well as a spectrum of what it looks like in real time... Note this will not be from my SDR, it will be IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. type, but I will have a frequency up in time, its not a baseband, only a I and Q of the spectrum....

Anonymous user #14

2061 days ago
Score 0+-

where can i hand in some screenshots of a signal?

tnx H

Anonymous user #15

1892 days ago
Score 0+-
Listen to the ghost box nantucket file

Anonymous user #16

1793 days ago
Score 0+-

Not a few of these mysterious 'transmissions' are caused by interference from the user's own domestic appliances, starting with computer CPU, PSU, monitor etc. These devices produce harmonics ('birdies') which seem like carriers; they also radiate pulses that appear to be signals. One of the noises here is a cell-phone charger! Solar-power roof-top systems are incredibly noisy!

Electrical appliances are by law not allowed to interfere with TV or radio broadcasts, but they can be heard on other parts of the spectrum.

A lot of commercial two-way VHFVery High Frequency (30-300 MHz)/UHFUltra High Frequency (300-3000 MHz) radio is trunked and digitally encrypted, and so it seems exciting, but is just routine messaging. And ham radio conversation is often pretty dull. Trust me... I'm a ham. It's 'ham'. Not 'HAM'. The letters do not stand for anything.

Anonymous user #8

1581 days ago
Score 0+-
I can ID about two dozen of these signals, down to the make and model of the equipment, and typical users, but I see no way to just "ID" them. To some, they will always remain a mystery, to others, crap we work with daily.

Anonymous user #17

1282 days ago
Score 0+-

"Weird pulsing" - CISCommonwealth of Independent States (CIS), the former Soviet Republic VFTVoice Frequency Telegraphy 3ch FSKFrequency-Shift Keying system. "New possible Russian digimode" - CISCommonwealth of Independent States (CIS), the former Soviet Republic MFSKMultiple Frequency Shift-Keying-4 FTM. "Weird Signal at 6912.43" - apparently idle 12-tone AT-3004D waveform. And a lot of Russian channel markers in this list, sure these markers must be moved to at least one Wiki page here. Same with "Unknown Russian Intel" transmissions - they are all related.

Best regards, RT.

Anonymous user #8

1193 days ago
Score 0+-
145.870MHz - video display interference

Anonymous user #8

1193 days ago
Score 0+-
3790 kHzKiloHertz (kHz) 10^3 Hz: https://www....sic_Station) Heard, and known, for decades

Anonymous user #8

1193 days ago
Score 0+-
40M pulsing spark gap lijke QRN - mains interference, due to arcing

Anonymous user #8

1193 days ago
Score 0+-
80 Meter Unknown - Consumer electronics interference, most likely a battery charger

Anonymous user #8

1193 days ago
Score 0+-
FSKFrequency-Shift Keying Signal - TADIL aka Link-xx

Anonymous user #8

1193 days ago
Score 0+-
K3UU-Unknown - CODAR

Anonymous user #8

1193 days ago
Score 0+-
Nknown 472p875 - Mobile Data Terminal, taxi, law enforcement, et cetera

Anonymous user #8

1193 days ago
Score 0+-
Noise on 160m - Digital Voice Terminal, long interleave. Military, DoD, NATONorth Atlantic Treaty Organization, et cetera.

Anonymous user #8

1193 days ago
Score 0+-
Noise on HFHigh Frequency (3-30 MHz) HAM Bands from 0 to 30 Mhz - Local consumer electronics RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum. Check your house, or a neighbour.

Anonymous user #8

1193 days ago
Score 0+-
Noise over all HFHigh Frequency (3-30 MHz) bands - Television display. Sound changes, as image changes.

Anonymous user #8

1193 days ago
Score 0+-
Periodic Signal - Potentially Police Related - VHFVery High Frequency (30-300 MHz) Pagers.

Anonymous user #8

1193 days ago
Score 0+-
Possible weather station sensor on air band - VORTAC

Anonymous user #8

1193 days ago
Score 0+-
Repeated Tone - Water system telemetry

Anonymous user #8

1193 days ago
Score 0+-
Sounds like a pager - Site to site data link for paging systems.

Anonymous user #8

1193 days ago
Score 0+-
Squiggling oddity - I could tell you, but nobody likes the answer.

Anonymous user #8

1193 days ago
Score 0+-
Strange Musical Repeating Tone - 945.716 MHzMegaHertz (MHz) 10^6 Hz - Local consumer product RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum

Anonymous user #8

1193 days ago
Score 0+-
UNID Telemetry - Metropolitan water system. Ask a tech what brand radio equipment they use.

Anonymous user #8

1193 days ago
Score 0+-
UNKNOWN 9.170 MHZ - OTHR, Over The Horizon Radar

Anonymous user #8

1193 days ago
Score 0+-
Unidentified 406p214 - Hydrological telemetry uplink. Look for sites near rivers, especially near bridges.

Anonymous user #8

1193 days ago
Score 0+-
Unidentified 5066p3kHz signal - Military radar data.

Anonymous user #8

1193 days ago
Score 1+-
Unidentified signal (APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area-like) - Hydrological telemetry. Stream gaging station.

Anonymous user #8

1193 days ago
Score -1+-
Unknow Happy new year and human voice - US citizens band radio noisemakers from kids toys. Common since the 1980's. Christmas music, not happy new year.

Anonymous user #8

1193 days ago
Score 0+-
Unknow signal lewis county Washington state - Your cellular phone radio system.

Anonymous user #8

1193 days ago
Score 0+-
Unknown 14.522-ish - OTHR, Over The Horizon Radar

Anonymous user #8

1193 days ago
Score 1+-
Unknown 14p219 - PSKPhase-Shift Keying amateur radio mode.

Anonymous user #8

1193 days ago
Score -1+-
Unknown 161p995 - Video display interference.

Anonymous user #8

1193 days ago
Score 1+-
Unknown 167 - Water system. Well monitoring.

Anonymous user #8

1193 days ago
Score 1+-
Unknown 171.651600 MHzMegaHertz (MHz) 10^6 Hz - X.25 data bursts, probably seismic systems.

Anonymous user #8

1193 days ago
Score 1+-
Unknown 173 - Metropolitan water system, well monitoring, command, and control telemetry.

Anonymous user #8

1193 days ago
Score 0+-
Unknown 19.07 MHzMegaHertz (MHz) 10^6 Hz - OTHR, Over The Horizon Radar. The 3 beeps is Morse Code letter S, to identify the signal, and that it is about to occur.

Anonymous user #8

1193 days ago
Score 0+-
Unknown 40 3 - Irrigation system telemetry.

Anonymous user #8

1193 days ago
Score 1+-
Unknown 434p450 - Household weather station.

Anonymous user #8

1193 days ago
Score 1+-
Unknown 465p97 MHzMegaHertz (MHz) 10^6 Hz - UHFUltra High Frequency (300-3000 MHz) pagers.

Anonymous user #8

1193 days ago
Score -1+-
Unknown 465p97 MHzMegaHertz (MHz) 10^6 Hz - Narrowband digital voice terminal, short interleave.

Anonymous user #8

1193 days ago
Score 0+-
Unknown 7p585 - Over The Horizon Radar

Anonymous user #8

1193 days ago
Score 1+-
Unknown Helix - Video display, could be interference, or the actual visual transmission, depending on frequencies used in the region

Anonymous user #8

1193 days ago
Score 0+-
Unknown NFMNarrowband Frequency Modulation Squelch system - LTR, Logic Trunked Radio control data

Anonymous user #8

1193 days ago
Score 0+-
Unknown Numbers Station 4p723 - EAM, emergency action message

Anonymous user #8

1193 days ago
Score 0+-
Unknown Ringing - VHFVery High Frequency (30-300 MHz) pager modes identifying themselves. Part of a city-wide multiformat paging network.

Anonymous user #8

1193 days ago
Score 0+-
Unknown digi mode - Coastal station digital "wheel".

Anonymous user #8

1193 days ago
Score 0+-
Unknown72p00Mhz - Paging system site to site data link.

Anonymous user #8

1193 days ago
Score 0+-
Weird Signal on Multiple Frequencies - Consumer electronics interference.

Anonymous user #8

1187 days ago
Score 0+-
Weird pulsing - consumer electronics RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum

Anonymous user #8

1187 days ago
Score 0+-
Wide signal unknown modulation - pagers, on a national paging frequency.

Anonymous user #18

1133 days ago
Score 0+-
Does anyone have a signal on 1917KHz; 1948KHz 1981KHz Etc, (spaced 32KHz apart). Top Band, 160Metres.

Anonymous user #8

1044 days ago
Score 0+-
2021-05-01T16 37 56Z 27105p00kHz - ROS digital mode, popular for at least a decade.

Anonymous user #19

914 days ago
Score 0+-

Weather alarm unknown frequency:https://www....und_4770_Khz

Is actually this: https://priy...ia/the-alarm

Anonymous user #20

729 days ago
Score 0+-
Frequency Drifting signals (13.795 MHzMegaHertz (MHz) 10^6 Hz — 13.83 MHzMegaHertz (MHz) 10^6 Hz) -> assumingly a so-called "chirp transmission" possibly. The Utwente SDR webpage has more info about these on http://websd...8901/chirps/

Anonymous user #21

707 days ago
Score 0+-
hi

Anonymous user #22

221 days ago
Score 0+-

Antartida HAARP on ULF?:

https://trop...00anim72.gif
Add your comment
Signal Identification Wiki welcomes all comments. If you do not want to be anonymous, register or log in. It is free.