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Signal type Description Frequency Mode Modulation Bandwidth Location Sample Audio Waterfall image
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 something like this at large:
CYeJJuyR.png
It's always active in my area, but I can never find any program that can decode it. It sounds like someone's just sending tones over the frequency, but it also looks digital.
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
158.430.000 mhz found this sound one day but could never figure out what it was 158.43 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz 2016-09-20 (2).png
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
236 MHZ pulses like a half sine pulses 236 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Signal236.png
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
418 MHZ 24 HOURS SIGNAL 418 MHzMegaHertz (MHz) 10^6 Hz HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Sin títul22o.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
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 usb modulation or not. 479.999 MHzMegaHertz (MHz) 10^6 Hz 1.3 MHzMegaHertz (MHz) 10^6 Hz Καταγραφή.PNG
863p151p150 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 142 kHzKiloHertz (kHz) 10^3 Hz 1234.png
869.525 130 kHzKiloHertz (kHz) 10^3 Hz Unknown869.png
?? satellite maybe? 7.4557 MHZ HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
Acer X222W monitor, sleep pulse Used for some PC monitors to keep the monitor's power on (or sleeping) across the spectra. Monitors may transmit whatever frequency peaks needed to keep it "on" or on sleep mode. 420 MHzMegaHertz (MHz) 10^6 Hz — 470 MHzMegaHertz (MHz) 10^6 Hz 300 kHzKiloHertz (kHz) 10^3 Hz Acer monitor default sleep signal.PNG
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
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 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
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
Continuous chirping Probably some kind of telemetry. Pay attention to the -5k/+5k delimiters 434.675 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz OOK SDR Sharp.PNG
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 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
Dupliate of MPT1327 165 MHzMegaHertz (MHz) 10^6 Hz Unknown165p929.png
Exotic Cipher An exotic polytone data type. 6.215 kHzKiloHertz (kHz) 10^3 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
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
Giant Band of Signal MHzMegaHertz (MHz) 10^6 Hz — 2 MHzMegaHertz (MHz) 10^6 Hz MHzMegaHertz (MHz) 10^6 Hz 1.5MHz.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
Morse Code with transmitter power issue Thing.PNG
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 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 12 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 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 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
Numberstation 6782 kHz Numberstation at 6782 kHzKiloHertz (kHz) 10^3 Hz 6.782 MHzMegaHertz (MHz) 10^6 Hz 2.4 kHzKiloHertz (kHz) 10^3 Hz
Odd Signal I found this signal one day. I have absolutely no idea what it is. It just seems like to be a blank carrier that is changing frequency. I confirmed it with my other 2 Scanners. It has nothing to do with my equipment. 162 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Dsg.jpg
Oddity AM Screen Shot 2016-06-19 at 9.03.04 PM.png
One Beep, Two Beeps One Beep, Two Beeps is a nickname given to an unidentified signal transmitting a series of beeps. 4.501 MHzMegaHertz (MHz) 10^6 Hz — 4.508 MHzMegaHertz (MHz) 10^6 Hz Picture.png
One of many signals near 877 MHz There are a lot of signals like this around 870 MHzMegaHertz (MHz) 10^6 Hz. 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
Periodic Signal - Potentially Police Related This signal is audible on all scanner, FMFrequency Modulation radios I own. Even picked up on analog television in some cases. The strong signal is mainly identified by its tone, data, and sometimes another tone. Repeats about twice a minute, but varies on the side of less frequent. On occasion, the tone is followed by a large and long burst of data, and then another tone. 152.69 MHzMegaHertz (MHz) 10^6 Hz 13 kHzKiloHertz (kHz) 10^3 Hz 150px
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 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 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 618576d.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 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).
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 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
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 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
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
Sonde type id while searching for sonde this came up used sonde monitor but didnt decode ?

any idea what sonde type gives this waterfall pattern ?

23:15 to 00:30 gets strong then dies off so all consistant with sonde
404 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). kHzKiloHertz (kHz) 10^3 Hz Sonde possible.JPG
Sounds like a pager This sounds like a pager but PDW couldn't detect anything, so it might be some other digital communication. 75.58 MHzMegaHertz (MHz) 10^6 Hz 12.5 kHzKiloHertz (kHz) 10^3 Hz Mysterymodempic.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 RUSSIA USB 6 8 2019 1605Z Monitored on Russian SDR continuous half second pulses. Monitored at 1605 UTC. 43.1 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz 43 11 USB.jpg
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 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
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
UnId2LongIsland Hear this signal all day, don't know what it is. 8.66 MHzMegaHertz (MHz) 10^6 Hz 20 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 406p214 Unidentified signal, 24/7 carrier, transmits mfsk-8? every 15 minutes. transmitter appears broken. 406.214 MHzMegaHertz (MHz) 10^6 Hz 14 kHzKiloHertz (kHz) 10^3 Hz M5jfh.png
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 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 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 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, audio file on page. (Not sure how to edit wiki properly.) 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 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 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 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 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 found at 9 pm utc sounds kind of like a radar but then it randomly bursts with buzzes 13.755 MHzMegaHertz (MHz) 10^6 Hz Kjm.PNG
Unknown (V.29 fax machine) modem Here is a signal that had popped onto my SDR earlier this summer, and it sounds like a typical fax machine modem using regular 9,600 baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.. Reasons I will describe below, and with audio samples coming in the future, I have never seen such oddity around here. Even stranger this signal is on 24/7 365 days a year. Only difference, it transmits a morse identifier I have yet to capture, but due to it being so far away, I cant capture it anymore. Also, apologies if the quality of the audio file is bad, as antenna was not good enough. 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 14.522-ish Unknown (possible radar) on HFHigh Frequency (3-30 MHz). 14.522 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz UnknownHF.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 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 171.651600 MHz short pulses

Possible solution:

ACARS transmissions from/to aircraft
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 18p880 Obviously not data, but likely something. My guess would be something like a buoy. 18.88 MHzMegaHertz (MHz) 10^6 Hz 2.7 MHzMegaHertz (MHz) 10^6 Hz Image.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 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 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 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 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 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 462.610-462.625 Found this while scanning FRS/GMRS channels. Weird noises with altitude announcements. Possibly from a drone or model airplane as there was a AMA Model airplane show going on a few miles from me 462.61 MHzMegaHertz (MHz) 10^6 Hz — 462.725 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Altitude.jpg
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 465p97 MHz Constantly transmitting Signal. Switches frequency. 465.97 MHzMegaHertz (MHz) 10^6 Hz, 466.23 MHzMegaHertz (MHz) 10^6 Hz and 466.075 MHzMegaHertz (MHz) 10^6 Hz 465.97 MHzMegaHertz (MHz) 10^6 Hz 25 kHzKiloHertz (kHz) 10^3 Hz 465p97MHz.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 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 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 7p585 Possibly OTHOver The Horizon (very long range) radar. 7.585 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz Sd.png
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 858p9 Found on 858.9538MHz and 859.0544MHz. 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. ZIP in description. 858.954 MHzMegaHertz (MHz) 10^6 Hz — 859.054 MHzMegaHertz (MHz) 10^6 Hz 12 MHzMegaHertz (MHz) 10^6 Hz Unknown 858p9 HDSDR.PNG
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 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 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 P25 simulcast or other trunking channel Sounds very similar to P25 except the beginning and ending preambles sound more like the RD-LAP type signal I posted here not too long ago. 170.675 MHzMegaHertz (MHz) 10^6 Hz — 172.275 MHzMegaHertz (MHz) 10^6 Hz 12 kHzKiloHertz (kHz) 10^3 Hz Unknown trunking or P25 simulcast transmission.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 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 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 SELCAL-like signal unknown selcal-like signal, suspected military usage. Has similar format to Selcal but there is no 200ms gap between the two groups, and the first group lasts ~1260 msmilliseconds (.001 of a second). the second group lasts 1 second proper. possible variant? 8.989 MHzMegaHertz (MHz) 10^6 Hz Unk selcal.jpg
Unknown Signal Periodic signal Approx once per minute. 154.426 MHzMegaHertz (MHz) 10^6 Hz MHzMegaHertz (MHz) 10^6 Hz Screenshot 2017-08-27 16-00-07.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 Thin Pulsing Unknown thin pulses. HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). 10 kHzKiloHertz (kHz) 10^3 Hz UnknownThinPulses Waterfall.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. 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). Unk 3.PNG
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 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 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 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 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 radar or data (see page for sound samples) Mystery solved, this is a Chinese Mulitonal Jammer. 9.045 MHzMegaHertz (MHz) 10^6 Hz 10 kHzKiloHertz (kHz) 10^3 Hz Oddity.PNG
Unknown signal This pulse is constant 24/7, I do not know what kind of interference it is. An unknown irregular impulse transmitting between 155,187.5 and 155,700 Mhz The signal is constant all the time. The received signal ranges between 155,187.5 and 155,700 MHzMegaHertz (MHz) 10^6 Hz. It emits a sound. It uses a large amount of bandwidth and interferes with other signals. 155 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). — 155.7 MHzMegaHertz (MHz) 10^6 Hz 700 MHzMegaHertz (MHz) 10^6 Hz SDR--.jpg
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 on 145.600 MHz 145.6 MHzMegaHertz (MHz) 10^6 Hz kHzKiloHertz (kHz) 10^3 Hz
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 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
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 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 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown Unknown 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 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown Unknown HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Unknown Periodic Signal @94kHz.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
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
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 military frequency I found this weired signal, bouncing arround the frequency. Anyone know's what this is? 232.56 MHzMegaHertz (MHz) 10^6 Hz Weired.jpg
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