Cartoonman's Corner

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Contact[edit]

I am currently the managing administrator of this website. You may contact me at [email protected] for any questions or concerns.

Status[edit]

Reduced activity expected from January to August.

New Sigidwiki Server upgrade is on hiatus until further notice.

On the agenda:

  • Modulation section, which will give an in-depth analysis of different modulation techniques used by signals to transmit data.
  • SDR section, giving information of the capabilities of SDRs in the market today.
  • Reworking the active/inactive categories.
  • New signal entries, as always (backlog of >25+ signals right now, give me time ok)
  • Rework and improve inadequate signal entries, an ongoing venture.
  • Look into using gfycat plugin for motion-based waterfalls for a richer experience.
  • Considering a references/links section for very valuable websites with relevant information.

--Cartoonman (talk) 09:27, 11 May 2016 (NZST)

https://www.sigidwiki.com/wiki/Maritime_Public_Safety_Radio_Network_P25


memcached: https://www.mediawiki.org/wiki/Extension:DynamicWikiSitemap

Desk[edit]

my messy desk \/


Cartoonman

1906 days ago
Score 0+-
Test

Anonymous user #1

1713 days ago
Score 0+-
soso

Anonymous user #2

1372 days ago
Score 1+-

The below on page http://www.s...ers_Stations is simply wrong. The first articles appeared in Monitoring Times and even PopComm acknowledged that. A single person mobile DF'ed both locations (I should know). Also the 2nd part about telephone wire pair is totally bogus and no article that I am aware of ever speculated that. The arrived at the transmit site via microwave on a 1.7 GHzGigaHertz (GHz) 10^9 Hz frequency (which was not published).

"Several articles in the radio magazine Popular Communications published in the 1980s and early 1990s described hobbyists using portable radio direction-finding equipment to locate numbers stations in Florida and in the Warrenton, Virginia, areas of the United States. From the outside, they observed the station's antenna inside a military facility, the Warrenton Training Center. The station hunter speculated that the antenna's transmitter at the facility was connected by a telephone wire pair to a source of spoken numbers in the Washington, D.C., area."

Mbeam

1369 days ago
Score 1+-
Anonymous user, First off you state that " (I should know) " and you are who ? Secondly "and no article that I am aware of" - so you admit you dont know it all. This is a wiki feel free to add your contributions and fact checks with backing evidence since " you should know ".

Cartoonman

1369 days ago
Score 1+-
I'm not sure what he is referring to. If he refers to the information at the bottom of the page of Numbers Stations, that information was taken from Wikipedia itself, so if there's any disagreement, go to Wikipedia.

Anonymous user #3

1312 days ago
Score 1+-
Thanks Cartoonman! I thought it was but wasn't sure!

Bronson

915 days ago
Score 0+-
how to move my page from unidentified to indentified section

Anonymous user #4

432 days ago
Score 0+-
What the T.I.'s with Audio Harassment Need for their Court Cases is a Trace, and Recording of the B.C.I. - Brain it Computer Interface/ V2K - Voice to Skull

Anonymous user #5

204 days ago
Score 0+-
Request my station assume NCS?

Anonymous user #5

204 days ago
Score 0+-
Approved. Going picket.

Anonymous user #5

204 days ago
Score 0+-
WILCO.

Anonymous user #5

204 days ago
Score 0+-
NIRO ping pong from your station. Change data freq to India 6
Add your comment
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Documentation[create]

Categories[edit]

_______ _________
No Audio File No Audio File
dfdfdfdfffdfdfdfdfdffd dfdfdffddffdfdfdf dfdfdfdfdfdfdfdf dfddfffddfdfdfdfdfddfdf
ggfgfgfgfgggfgffggfgfgfgf

Agenda[edit]

https://www.youtube.com/watch?v=o5yWZcjReb8

  • Fix up frequency ranges for large # of signals [Passive]
  • Add (and do painstaking research on) new signals [Priority]
  • Split signal entries that require their own article [CODAN]
  • Articles Pending Significant Rework:
    • PACTOR
    • GSM
    • Ionosonde
    • Multitone Type 7
    • ADS-B
    • 4G LTE
  • Add links for information for signals [Passive]
  • Rolling improvements to waterfall images when able to. [Passive]
  • Enhance Requested Signals Section [Ongoing]
  • Enhance category pages [Ongoing]
  • Elaborate instructions on adding and editing articles [Ongoing]


http://www.hfunderground.com/board/index.php/topic,19628.0.html http://wiki.radioreference.com/index.php/HF_Modes_Currently_Inactive

To Be Researched[edit]

Lis of links for ADS-B info[edit]

Working on articles for[edit]

On Hold:


Will be updated as I go through the never-ending list. =^)

Rolling srcs[edit]

http://ac4m.us/other_hell.html

http://www.radiosonde.eu/RS00-I/RS03G-I.html

http://www.dd1us.de/spacesounds%204h.html

http://jvcomm.de/soundsamplese.html

http://www.dxmaps.com/sounds.html

http://goughlui.com/legacy/soundsofhf/index.htm

http://www.amsat.org/amsat/features/sounds/firstsat.html

http://www.uhf-satcom.com/sounds/

https://radiomonitoring.wordpress.com/

http://www.radioscanner.ru/forum/uploader.php?action=search

http://sp9jpa.blogspot.com/p/pawe-jaocha-sp9vrc.html

http://det.bi.ehu.es/~jtpjatae/ham.html

http://www.tech-software.net/RTL1090/

https://www.youtube.com/channel/UCMeg7WaCAPRFjIZgqUi32Uw

http://www.prgm.org/projekte/aa-db/sound/

http://www.udxf.nl/uc5.html

https://theinspireproject.org/default.asp?contentID=17

http://www.radioscanner.ru/files/audio/

http://ftp.funet.fi/pub/dx/text/utility/uworld-3-1992

http://home.kpn.nl/perto014/

http://www.numbersoddities.nl/tones.html

http://f1ult.free.fr/DIGIMODES/MULTIPSK/digimodesF6CTE_en.htm

http://www.milspec.ca/modems/modems.html

http://ik1yde-segnaliemodulazionidigitali.blogspot.com/

http://www.iarums-r1.org/iarums/sound/main.html

http://www.qsl.net/g4hbt/sounds.htm

http://www.iarums-r1.org/

http://www.w2sjw.com/radio_sounds.html

http://web.archive.org/web/20080323063322/http://signals.taunus.de/DIG_introd.htm

http://www.ominous-valve.com/uteworld.html

http://www.lucabarbi.it/oldweb/tech_info/systems/

http://www.udxf.nl/Utility%20DXing%20-%20A%20Primer.pdf

http://www.george-smart.co.uk/wiki/Digital_Modes_Waterfall

http://www.w1hkj.com/FldigiHelp-3.21/Modes/

http://www.w1hkj.com/FldigiHelp-3.21/html/

http://i56578-swl.blogspot.com/

http://sferix.myweb.hinet.net/hfasia/

http://www.iaru-r1.org/index.php?option=com_content&view=article&id=252&Itemid=87

http://www.astrosurf.com/luxorion/qsl-audiofiles.htm


http://wb8nut.com/digital/

http://www.hfradio.org.uk/html/digital_modes.html

http://www.kb9ukd.com/digital/

http://www.nonstopsystems.com/radio/radio-sounds.html

http://ac4m.us/digital_modes.html

http://www.kb9ukd.com/digital/

http://www.wunclub.narod.ru/sounds/index.html

http://www.brazoriacountyares.org/winlink-collection/Winlink%20articles/HF%20digital%20tower%20of%20Babel.pdf


http://www.numbersoddities.nl/Digifaq53.pdf


http://goughlui.com/2015/03/28/trip-to-hk-cn-2014-part-5-rtl-sdr-more-radio-ais-night-photos/


ARQAutomatic Repeat reQuestAutomatic Repeat Query def: Three characters are transmitted by Information Sending Station (ISSInformation Sending Station in an ARQ link (The station sending information to the recipient). Usually the signal that's longer in duration than the short RQ (Repeat Request) bursts from the IRS.). Takes 210 milliseconds. The ISSInformation Sending Station in an ARQ link (The station sending information to the recipient). Usually the signal that's longer in duration than the short RQ (Repeat Request) bursts from the IRS. then waits 240 msmilliseconds (.001 of a second) for a response. Information Receiving Station (IRSInformation Receiving Station in an ARQ link (The station receiving information from the ISS. Will send RQ's (Repeat Request) to let the ISS know the information was received successfully.) receives the three characters and checks that they each have 4 marks and 3 spaces. If they do, then the IRSInformation Receiving Station in an ARQ link (The station receiving information from the ISS. Will send RQ's (Repeat Request) to let the ISS know the information was received successfully. transmits an acknowledgement. If they don't, then the IRSInformation Receiving Station in an ARQ link (The station receiving information from the ISS. Will send RQ's (Repeat Request) to let the ISS know the information was received successfully. requests retransmission. At the beginning of the next frame, the ISSInformation Sending Station in an ARQ link (The station sending information to the recipient). Usually the signal that's longer in duration than the short RQ (Repeat Request) bursts from the IRS. either retransmits the last 3 characters or the next three characters.

possibly useful[edit]

MODULATION CODES COMMONLY USED TYPES ARE:

  • A1A -telegraphy (on - off keying) without modulation by an audio frequency;
  • A1B -amplitude modulation telegraphy with automatic reception, without using a modulating subcarrier;
  • A1D -amplitude modulation data transmission, double sideband, without using a modulating subcarrier;
  • A2A -on-off keying telegraphy using one or several modulating audio frequencies, or on-off keying telegraphy of an amplitude modulated emission;
  • A2B -amplitude modulation telegraphy with automatic reception and using on-off keying of the modulating subcarrier;
  • A2D -amplitude modulation data transmission, double sideband and using a modulating subcarrier;
  • A3C -amplitude modulation facsimile; the main carrier is modulated either directly or by a frequency modulated subcarrier;
  • A3E -amplitude modulation telephony, double sideband;
  • C3F -television, in amplitude modulation, with vestigial sideband;
  • F1A -telegraphy (keyed by frequency variation);
  • F1B -frequency modulation telegraphy with automatic reception, without using a modulating subcarrier;
  • F1D -frequency modulation data transmission, double sideband, without using a modulating subcarrier;
  • F2A -on-off keying telegraphy of an audio frequency for frequency modulation, or by on-off keying of a frequency modulated emission (special case: unkeyed frequency modulated emission);
  • F2B -frequency modulation telegraphy with automatic reception and using on-off keying of the modulating subcarrier;
  • F2D -frequency modulation data transmission, using a modulating subcarrier;
  • F3C -modulation frequency facsimile, by direct modulation of carrier frequency;
  • F3E -frequency modulation telephony;
  • F3F -television with frequency modulation;
  • G1D -phase modulation data transmission, without using a modulating subcarrier;
  • G2D -phase modulation data transmission, using a modulating subcarrier;
  • G3C -phase modulation facsimile:
  • G3E -phase modulation telephony;
  • G3F -television in phase modulation;
  • J1D -amplitude modulation data transmission, single sideband, suppressed carrier, using a modulating subcarrier;
  • J2A -on-off keying telegraphy using one or several modulating audio frequencies, or an on-off keying telegraphy, single sideband, with suppressed carrier;
  • J2D -amplitude modulation data transmission, single sideband, suppressed carrier without using a modulating subcarrier;
  • J3C -amplitude modulation facsimile; single sideband, with suppressed carrier;
  • J3E -amplitude modulation telephony, single sideband, with suppressed carrier;
  • J8E -amplitude modulation telephony, independent sidebands;
  • K1A -on-off keying telegraphy of a carrier transmitted by pulses, without modulation by an audio frequency;
  • K2A -on-off keying telegraphy of one or several audio modulating frequencies, or by on-off keying of a modulated carrier transmitted by pulses (special case: unkeyed modulated carrier transmitted by pulses);
  • K3E -pulse modulation telephony.
  • R3C -amplitude modulation facsimile; single sideband, with vestigial carrier;
  • R3D -amplitude modulation data transmission, single sideband, with vestigial carrier;
  • R3E -amplitude modulation telephony, single sideband, with vestigial carrier;


Comment Archive[edit]

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

Enable comment auto-refresher

Anonymous user #1
1894 days ago
Score 1+-

In response to the person who posted about the "Police Idling Walkie Talkie Radio Signal"
I have also found the same signal in the UK which is on the 70cm band it pulses every few seconds with 12MHz BW, I also noticed there is an other pulse signal 30 mhz apart which pulses at a slower pace once every 4 or 5 pulses.

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Anonymous user #2
382 days ago
Score 1+-
I am pretty sure its an LTR trunked system listened to with a side band mode

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Anonymous user #3
297 days ago
Score 1+-
I also have this signal in my area in Canada. Between 463MHz - 465MHz there are several throughout that range all repeating separately every few seconds. I do live near a police station but have yet to see any other activity on these signals besides the period chips.

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Anonymous user #4
1887 days ago
Score 0+-
1.8126MHZ; a female voice reading out a string of numbers in what sounds like Italian language. Heard for one hour 2100hrs GMT. This is in the Ham Radio top-band frequency range.

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Anonymous user #5
1549 days ago
Score 1Voted

"1.8126MHZ; a female voice reading out a string of numbers in what sounds like Italian language. Heard for one hour 2100hrs GMT. This is in the Ham Radio top-band frequency range."

There's also the english version if you wait enough
METEOMAR VHF 156.425 MHz by Telecom Italia

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Anonymous user #6
1451 days ago
Score 0+-
probably maritime or aviation weather forecast

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Anonymous user #4
1873 days ago
Score 1+-

All the missing sound samples here: https://mega...GuGFwpEcxfaA
Please let me know if you need more.

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Erbo
1846 days ago
Score 0+-

Very nice wiki! very helpful! Unknown 40 is very weird.
I'm located in Quebec, Canada near Montreal, lots of signal around, some unknown.

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MikeAgner
1839 days ago
Score 0+-

Hi - I just joined, and noted a few things that are incorrect;

a. Serdolink is misspelled - it should be Serdolik

b. There seems to be quite a bit of confusion on the Cuban HM01 listing. DIGTRX is not a mode - it's an app originally written for digital TV, and folks try to use it to read the data sent by this station (only not very well, from what I hear). The mode is an adaptation of a ham mode known as Redundant Data File Transfer or RDFT. You can find listings for this at the well known Numbers and Oddities website, listed as 'AM/RDFT' as the mode
In the next few days I will be adding a lot of software links. Stay tuned...

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MikeAgner
1838 days ago
Score 0+-

I'll add that to my list :.>>

Actually I found something on RDFT that might be of interest, and even a link for DIGTRX

http://swlin...nd-explains/

http://digtr...nformer.com/
I have a little more, but I'll save that for when I work on that article...CUL Mike

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MikeAgner
1832 days ago
Score 0+-

You can also find a nice summation of many of the amateur digital modes, and at least 1 web page for each, here....
http://wiki....mateur_Radio

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Anonymous user #7
1815 days ago
Score 1+-

The last signal "weird moving signal" I know EXACTLY what that is, it is an OLD type of telemetry signal used to remotly send the value displayed on a gauge or dial, It works by taking the circular movement of a needle on a dial (like a thermometer or pressure gauge) and connecting the shaft to a potentiometer and using the pot to control a VCO, you get the data by knowing the "center" frequency and calculating the offset value of the Continuous signal as it moves up and down, the ammount it moves is displayed at the RX end by taking the difference in frequency and using that value to move a dial on a gauge.
This tech dates WAYYY back, back to the 1930's

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Cartoonman
1805 days ago
Score 1 You
I will look into this as soon as I get a chance, thanks!

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Admin
1805 days ago
Score 0+-
I thought that it was probably just be some sort of internal noise from the RTL-SDR, but this might be right too.

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Anonymous user #8
1751 days ago
Score 1Voted
Maybe someone could add Autex from MultiPSK.

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Anonymous user #9
1651 days ago
Score 0+-

Anon #7 is ABSOLUTELY right about that "weird moving signal" one, it is used for what s/he said, and more, it used to be used also for seismographic sensor data collection, as follows:

Lay out a LARGE array of sensors, each with one of these analog telemetry TX units, each on a different freq. and you RX it in USB mode, like s/he said to get the data back you have to know the centre freq. and amount the offset of the signals are the data.
I was VERY shocked to see that these are STILL being used, I say that because back then the bands were almost devoid of activity, save for A1A ship to shore comms. When more and more users began to use the radio spectrum these devices were banned because they cause TERRIBLE interference!!! they roam around a centre freq. and can deviate by as much as 100 kcs up or down!

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Cartoonman
1650 days ago
Score 0 You
Interesting... This will be the next signal I look into. Do you know any specific names or devices of these kind of signals to ease my research?

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MillMan
1626 days ago
Score 0+-

CartoonMan :
Let say , it is static position. how do we figure out ?

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Cartoonman
1626 days ago
Score 0 You
hmm, if its a geostationary satellite, i guess you'll have to figure out the frequency for your specific part of the earth and the satellite that corresponds to that frequency. Geostationary satellites follow the earth's rotation so they stay in the same relative area of the earth, and if this is true i dont think the frequencies would be allowed to mix with other satellites in that region at least.

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MillMan
1614 days ago
Score 0+-

2 things :

1. Let say i know the signal comes from satellite , how do we confirm the signal comes from that particular satellite 2. I received strange waterfall pattern. http://imgur.com/SVoihWF
any comment !

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Cartoonman
1614 days ago
Score 0 You

the 2.4GHz range has a bunch of oddities, and i think i've seen what you got, but may not be from same transmission: http://imgur.com/AmluTy4
If you can figure out the satellite's modulation and specific frequency to be the same frequency you receive, and you do some independant tests where you try to receive indoors vs outdoors, then you can say with some evidence that your signal comes from that particular satellite. May I ask what satellite you're looking at?

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Anonymous user #10
1274 days ago
Score 0+-
Looks like a microwave oven..

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MillMan
1607 days ago
Score 0+-
hi there, I did at http://www.s...l_at_2.4_GHz

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Cartoonman
1606 days ago
Score 0 You

Is this the one you suspect to be a satellite? I *think* the 2.4GHz is ISM so many different devices operate on it (not to mention microwaves to say the least). Satellites would probably stay away from this range.
For your signal, is it possible to see how wide these bursts are? In the docx you provided i see a middle point where signal power is decreased, which would suggest that this is the center frequency of the transmission. The sidebands of it therefore must be to the left and right of the signal

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MillMan
1603 days ago
Score 0+-
I use AirMagnet Spectrum XT and I can see the same thing. The sound is totally different because it is not wifi sound. detected everywhere in the region. sometime it affected few channels ( 4-10 channels ).

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Cartoonman
1603 days ago
Score 0 You
hmm, have you been able to localize where it occurs? usually 2.4GHz stuff is near-proximity because of line of sight behavior of microwave band. It might be some sort of 2.4ghz telemetry that's really strong for some reason. It probably isn't a satellite, but then again i haven't had much experience with satellites.

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Anonymous user #11
1599 days ago
Score 0+-
well.. the radio sound always the same and never change and inside the flight as well.

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Cartoonman
1598 days ago
Score 0 You
hmm... could it possibly be noise? either from the receiver or computer?

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Anonymous user #11
1591 days ago
Score 0+-
no, i tried in different place where no electronics , i have same sound wit different power lovel at 2.4 GHz

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Cartoonman
1591 days ago
Score 0 You

and you have received the same signal with a different receiver or sdr? i know some upconverters like mine emit some spurious emissions which get picked up and i was able to see them with another sdr so i could verify it was really there.
I believe 2.4GHz is ISM band so it could really be anything.

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The6P4C
1541 days ago
Score 0+-
I just updated my unknown signal, http://www.s...nown_504p690. I fixed the broken IQ file link, so if anyone'd like to have a look it's there. I'd be very interested if anyone can derive some meaning from it :)

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Cartoonman
1540 days ago
Score 1 You
I've added my analysis. You found quite a fascinating signal there. At first I thought it was just computer noise but when i analyzed it, there was too much perfection that it had to be on purpose and transmitting data.

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Linkz
1535 days ago
Score 1Voted
oops i post on the wrong page, admin ack those informations & delete them please

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Cartoonman
1535 days ago
Score 0 You
Your ids have been acknowledged, thanks!

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Anonymous user #12
1534 days ago
Score 0+-
Señales interfirente potent en 7.120 con un ancho de banda de 15 kcc recibido en receptores SDR de España, Francia, Holanda, Suècia, Polònia, Chekia,Rusia y tambien en Australia 15.00UTC hasta 23.00 UTC Origen desconocido .

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Cartoonman
1534 days ago
Score 0 You

"Interfering signals in 7120 kHz with a bandwidth of 15 kcc received in SDR from Spain , France, Holland , Sweden, Poland , Chekia , Russia receptors and also in Australia 15.00UTC until 23:00 UTC Unknown Origin"

lo siento si no comprendo claro.

http://puu.s...5d7b617e.jpg
I believe this is what you saw /\. I looked at WebSDR at University of Twente, and this was their log from ~6:30 UTC yesterday. If the signal was 15 kHz wide, most likely 29B6 Russian Over the Horizon Radar.

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MillMan
1497 days ago
Score 0+-

Dear All, I detected unknown signal and I have captured using SDR# and HackRF. It is 16 Bit PCM Baseband ( IQ file , the file can be downloaded : https://mega.nz/#!wgohWRyQ
I need help to decode the signals.

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MillMan
1496 days ago
Score 0+-

here is the link to download he file :
https://mega...V0aML5wCr6uY

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Cartoonman
1487 days ago
Score 0 You
i've added an entry for this here: http://www.s...own_2.42_GHz

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Anonymous user #13
1459 days ago
Score 0+-
a

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Cartoonman
1459 days ago
Score 0 You
?

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ANgazu
1446 days ago
Score 0+-

Hi.

I would like to add some ACF data to signals, but not proper field so ARTEMIS can not display it.

Hope you can add that field.
Best regards.

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Cartoonman
1446 days ago
Score 0 You
Hi ANgazu, i've now added ACF support to signals. You can either add "|ACF=" to the signal's source code in edit, or use the edit form option and enter the ACF field for the signal.

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ANgazu
1444 days ago
Score 0+-

Thanks Cartoonman.

I will add some ACF to database. Hope it helps in Signal Identification.
Besta regards.

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Aco
1443 days ago
Score 0+-

Hi ANgazu, thanks for your work: I've planned to upload updated version of Artemis (with ACF filters, new DB and so on) this evening. Some suggestion about ACF data (to keep some formalism on International System of Unit (SI) and avoid equivocal definitions):

1) Abbreviation of second should be "s" (lowercase) and not "S" (uppercase, Siemens = electric conductance) 2) To keep consistency, all time intervals should be written in ms (milliseconds). For instance, TETRA superframe: 1020 ms

PS: Thanks again for your contribution!

Cheers,
Marco

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ANgazu
1442 days ago
Score 0+-

Thanks for the tip.

All times will be in ms.


Best regards.

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Anonymous user #14
1441 days ago
Score 0+-

This unidentified signal I have solved http://www.s...unked_System

447.135 its a NXDN48 signal. The "Kunsthalle" Vienna is this 447.350 its a NXDN96 signal, used bei the Vienna Schatzkammer

This radios are used
http://comms...p?category=1

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Cartoonman
1440 days ago
Score 0 You
Thanks for your identification! I will merge this with our existing NXDN page as soon as i can!

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Cartoonman
1440 days ago
Score 0 You

ANgazu, regarding your recent submission: http://www.s...0_Appendix_C
Is this MIL 188-110C App.D? Theres a lot of confusion between different versions since updated standards reuse the same letters but may change the appendix. This is because we have http://www.s.../STANAG_4539, which is also called MIL-STD-188-110B/C Appendix C.

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ANgazu
1439 days ago
Score 0+-

It is appendix C and you are OK, It is 4539, too, so please erase my submission. ACF is 119.6 mS for App C.

Best regards.
ANgazu.

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MikeAgner
1437 days ago
Score 0+-
Please make Multi Frequency Shift Keying (MFSK) on the Amateur Radio category green. Along with Olivia, it's used almost every weekend during the VoA tests (2 other stations are also participating). See the link I added in those articles for more information if you're interested. Thanks

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Cartoonman
1437 days ago
Score 0 You
Thanks, I've updated the status of MFSK. It should update by the next server database refresh.

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MikeAgner
1433 days ago
Score 0+-

You can additionally change these to green;

HF signals (verified by number of logs found in the UDXF Yahoo group) CCIR493-4 North Korean Diplo FSK Packet (kinda rare on HF, more on VHF) PACTOR1 and 2 Serdolik Siemens CHX-200 (last seen in 2015 - rarely reported)

VHF Systems Next Generation Digital Narrowband (NXDN)

Trunked Systems Enhanced Data Access Communications Systems (EDACS) Logic Trunked Radio (LTR) Motorola Type II

I'm unsure as to whether you're in the US or not, but those 3 trunking systems are quite active, and as you noted, EDACS is going EOL in about a year or so. NXDN is a slowly growing trunked app, being used in railroads (and a couple of private and statewide systems)., It's both a trunking and conventional app
I'll adjust the categories over the weekend. Please change these on the main page to green. Thanks

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Cartoonman
1432 days ago
Score 0 You
Thanks for the updates on these signals! When I see the changes updated, I'll refresh the pages for you so that they are displayed green.

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Anonymous user #15
1412 days ago
Score 0+-

I have recorded strange signal at 2,4 GHz. Please make a note that the transmission is vertical line.

The signal can be downloaded at :

- Signal data set : https://mega...DcVB6nzdCGko
- https://mega...-WjpHbWaDwb0

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Cartoonman
1412 days ago
Score 0 You
If you have airspy, try using their new Spectrum Spy program which allows you to view a much wider bandwidth in real time. The problem with having a smaller bandpass than the signal bandwidth is you cannot really tell what the signal really is. The vertical line transmission could just be a harmonic from some other much more powerful continuous wave signal. Lots of signals occupy the 2.4 ISM band so it will be hard to figure out where it's exactly coming from.

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Mbeam
1406 days ago
Score 1Voted
USA military EAM on 8.992 was active just a short while ago , will post audio later

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Cartoonman
1406 days ago
Score 1 You
Added your audio recording to the HFGCS page.

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Mbeam
1405 days ago
Score 0+-
HM01 number station active again on 9.065

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Anonymous user #16
1386 days ago
Score 0+-

https://youtu.be/Niksar3AEKg
Let me know what you think...

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Cartoonman
1383 days ago
Score 0 You
Radio frequencies don't interact with water in such a visible way. I'm afraid that what you have is just either heat or wind aberrations.

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QuantumQuetzal
1382 days ago
Score 0+-

Hi! I recently made a request about a signal that is always transmitting in the 850 MHz band,in my hometown Santa Tecla, El Salvador. Here's the link to the article.

http://www.s...850_mhz_band

What kind of digital mode that signal, my guess is something related to speech communications but I've never heard something similar.

Is it possible to decode it? Which decoder I should use? Because I've tried DSD+ and nothing picks up.

My rig is only a full vanilla RTL-SDR
Best regards!

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Cartoonman
1382 days ago
Score 1 You

Look into our entry on iDEN. I'm 100% certain this is what you're seeing.
http://www.s...twork_(iDEN)

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QuantumQuetzal
1382 days ago
Score 0+-

Thanks Cartoonman! Indeed it is iDEN.
It's possible to delete my entry? To avoid any duplicates of the same subject?

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Cartoonman
1381 days ago
Score 0 You
Don't worry, I'll merge your entry with the existing iDEN one. Our entries can always use more samples :)

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Lsr
1356 days ago
Score 0+-
Sometimes it can be helpful to lookup the devices that operate at a particular frequency: https://fcci...explorer.php

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KarapuZ
1347 days ago
Score 0+-
Signal "Unknown FSK, possible STANAG 4202" is a Finnish encrypted messaging system NOKIA ADAPTIVE M85200 M / 90 MSG TERMINAL. In the transmit mode at a speed of 150 baud, used is characteristic coding, which is described in the comments Cryptomaster this link: http://signa...e/signal135/

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Cartoonman
1347 days ago
Score 0 You
Thanks, the signal entry is now made!

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QuantumQuetzal
1334 days ago
Score 0+-
hi! recently i catched what i believe is a rtty transmission on 16.122 khz, here's a link of that https://driv...hdHVyYndIZzg the transmission ended at 20:00 UTC -4 (central america)

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Cartoonman
1333 days ago
Score 0 You
What you got is most likely http://www.s.../STANAG_4481 STANAG 4481, which is commonly found in the shortwave bands these days with 850Hz spread. Military fsk transmission shore to ship I believe.

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QuantumQuetzal
1332 days ago
Score 0+-
Oh! I see. but catching a supposed stanag transmission on Salvadoran coast (which I'm close to) is super weird or the atmospheric conditions was in favor because I even caught Radio Habana in 15.140 khz. Even though there is a bad case of strong FM stations blasting 24/7 casing intermodulation on my sdr dongle

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Cartoonman
1332 days ago
Score 0 You
STANAG is used by a lot of militaries, not only NATO. It's likely a US based one and yea, propagation conditions can make it so that you can hear it. Since it's just standard FSK, you could try to decode using a generic RTTY decoder, but if it's encrypted you'll only get garbage, or if they're using a different encoding or charset.

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QuantumQuetzal
1332 days ago
Score 0+-
Oh I didn't knew that. And to decode that fsk, I used sorcerer but like you said I've decoded a lot gibberish. Any way thanks a lot!

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AmatorRadioResearcher
1331 days ago
Score 0+-

Guys, anyone has the experience of decoding ACARS system?
Does anyone have any information regarding the operations that must be applied after demodulation, to see the header that is claimed in the standard ?

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AmatorRadioResearcher
1330 days ago
Score 0+-
http://www.s...stem_(ACARS)

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Anonymous user #17
1330 days ago
Score 0+-

I think the header is xor ed with something
you need to find that something :D

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Anonymous user #18
1327 days ago
Score 1+-

I have got the same problem
please share you knowledge if you found the answer

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AmatorRadioResearcher
1316 days ago
Score 0+-

Guys with Experience on ACARS system, Would you please share your experience to the operation that is needed to expose the header out of the demodulated bits ? The discussion page is here: "http://www.s...stem_(ACARS)"
With Special Regards,

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Anonymous user #19
1259 days ago
Score 0+-

Hello.

Having problems whith GM2100 waterfall and sound. Files are uploaded but no showed. Please, try to do it for me.

Thanks a lot.
ANgazu.

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Anonymous user #20
1233 days ago
Score 0+-
Can a RTL-SDR be used as a troubleshooting tools for Wi-Fi, Z-Wave, and ZigBee signaling problems in home automation systems. Has anyone developed software to accomplish this?

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Anonymous user #21
1232 days ago
Score 0+-
Of course! I use my SDR all the time to diagnose issues with my wireless weather sensors. Usually it just comes down to low battery power, but it can also be used to make sure that the signal is received strong enough by the receiver depending on the RF environment.

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Anonymous user #21
1232 days ago
Score 0+-
With Wifi, rtl-sdr isn't really suitable due to the wide bandwidth of wifi compared to the relatively narrow passband of the rtl-sdr. Not sure about the other 2 but they sound like IoT systems, which i believe are in the frequency range of rtl-sdr and are narrow enough to do so.

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Vittorio
1228 days ago
Score 0+-
hy my friends i have a DVB-T DAB+FM+SDR. dongle i live in the west coast puerto rico,my question is when it sas tha Bandwith is:PSK,C4FM OR 4FSK. what means dose letters after the 4 ???PSK ??? C4FM???....IM INTEREST IN (P25)in my town how i can hear it with my dongle pleace help my friend i have the basic sdr# program for beiguiners

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Cartoonman
1228 days ago
Score 0 You

Hi Vittorio, when something says PSK, C4FM, or 4FSK, these are modulations, not bandwidth. PSK = Phase Shift Keying, using phase of carrier to shift bits. C4FM and 4FSK are unique modes to P25. They're simply how it sends digital data over analog RF channel.

To listen to P25, you first have to find frequency of a P25 control channel or radio channel. They tend to be around 400-550 Mhz or 800-860 MHz.
Tutorial for trunked radio: http://www.r...-unitrunker/

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Anonymous user #22
1222 days ago
Score 1+-

I recorded this is Bermuda back in 2013 on 460.100MHz can anyone ID?
http://forum...#post2164801

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Cartoonman
1220 days ago
Score 0 You
Not sure. It has some semblance to some data terminals possibly, for bus or taxi dispatch. Not sure though.

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AmatorRadioResearcher
1199 days ago
Score 0+-

Hi everyone I am focusing on the demodulation of c4fm modulation which is actually a Continuous Phase 4 Frequency Shift Keying (CP4FSK). The demodulation method of mine works perfectly if time synchronization is done beforehand. By the way I have no Idea how the synchronization is carried out in DMR signals. There is a sync pattern in the document which has 48 bits (or equivalently 24 symbols) by which we can correlate to find the sync signal. But no correlation is found in my synchronization , and no peak is detected.
Would you mind helping with me if you have any experience in the synchronization of DMR ? With regards, Amator Radio Research

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AmatorRadioResearcher
1170 days ago
Score 0+-

And again I found the answer myself. The problem was with the offset frequency. I devised a method which can get the result regardless of the offset frequency. Please guys be more contributive!
You can email me at : [email protected] to share knowledge

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Anonymous user #23
1174 days ago
Score -1+-
bird calls could possibly be Radio New Zealand, they transmit the same sort of calls to start their transmission in the morning.

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Admin
1135 days ago
Score 0+-
Note: Problems with logging in and cookies should be resolved now. Sorry for the downtime.

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Paray
1128 days ago
Score 0+-
hi - please helpe me about decoding tachta voice scrambling with krypto500 software that whate mode select in krypto500 ....?

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Crossband
1092 days ago
Score 0+-
The random page link doesn't work because of the browser's cache. Please fix it.

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Paray
1083 days ago
Score 0+-

hi - please helpe me about decoding yachta voice scrambling with krypto500 software that whate mode select in krypto500 ....?
speech descrambling in HF ?

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Cartoonman
1083 days ago
Score 1 You
I dont own Krypto500 so I wouldn't know. You can look at their user guides for that

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Gnar
1083 days ago
Score 1+-

You can't de-scramble voice in krypto 500.
BTW, if you search hard enough for Krypto 500, you'll find a "free version" (not talking about sorcerer; sorcerer is actually just a 1:1 copy of k500 in another interface)

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Paray
1081 days ago
Score 0+-
hi- thank you for answer . please helpe me about descrambling voice in HF

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Anonymous user #24
975 days ago
Score 0+-

Free version of Krypoo-500 ? What about krypto-1000 ? I searched a lot , but I couldn't find it.
Would you please share ?

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Gnar
975 days ago
Score 0+-
search on google for k500 on FTP servers.

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Ywsia1
971 days ago
Score 0+-

There is a signal in Chicago somewhere that's AFSK, but its unlike any AFSK you would usually hear. From the modes being transmitted on this frequency: 454.475 MHz via Ameritech mobile services Utd. there is a couple of AFSK paging links that transmit, but several 2400 baud modulations, which are also POCSAG modulated as well as another 1200 baud version that transmits rather oddly to an AFSK paging link, so in essence im not sure if i'm hearing an uplink repeater to an APOC signal or not. The APOC mode has been requested for too long.

Unfortunately, I do not have a signal sample as I would have to be on the lower end of Southwest Michigan or Chicago to receive.
On flip side, due to the audacity software I have, and the amazing amount of programming I could do with such DSP, I have generated what wouldv'e sounded exactly as one would hear these modulations on this frequency. Will try to give the sample as soon as possible...

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Anonymous user #25
950 days ago
Score 0+-
Some radio signals worldwide are used for secret agents mesages and are crypted with old methods that no ona can descramble but those who have corespondent keys taht cold be literary anything !

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Ywsia1
875 days ago
Score 0+-
there should be a chat/server thing where various people like from this website could go on it and post unidentified signals or anything related to radio.

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Fiber
873 days ago
Score 0+-
May I suggest Discord? Mostly gamers use it, but it can be used for anything. Better than Skype with no ads or other garbage. Less archaic than IRC.

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Cartoonman
859 days ago
Score 0 You
Currently the only 'unofficial' signal-id chat forum would be on reddit's signalidenficiation subreddit. If you guys want a chat IRC type of server (discord is fine), I can set one up.

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Ywsia1
845 days ago
Score 0+-
I actually like that discord link. Currently gaining headway.

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Anonymous user #26
766 days ago
Score 0+-
Hi, DMR signal is not decoding correctly I could not hear any voice when I had tried to decoding it by means of SDRsharp and DSD+ . pleas put other samples and tell more about decoding process and open source software. DMR page is very vague.

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Anonymous user #27
757 days ago
Score 0+-

Hi everyone,
how can we detect vhf signal of 1ms duration or the burst vhf signal ?

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Anonymous user #28
748 days ago
Score 0+-
i too got some unknown signals can anyone identify them

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MikeAgner
696 days ago
Score 0+-

This page should be renamed; the station names are WWV and WWVH, not... https://www....ime_Standard
Which is the time standard these stations use. It would keep in concert with the other time stations in the list

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Cartoonman
696 days ago
Score 0 You
I agree. Are they both separate stations (with seperate waveforms) or both stations broadcast identically?

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Aco
669 days ago
Score 0+-
Hi all, Marco here! Artemis DB has been updated to Ver.40!!!! 353 recognized signals, 345 spectra, 325 audio samples with 37 ACFs. Enjoy!!!

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Ywsia1
661 days ago
Score 0+-
If anyone is interested, I am very good at identifying AFSK or FM-modulated signals that have bitstreams in them. Like example, AFSK paging link, water tower data, etc.

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Anonymous user #29
612 days ago
Score 0+-
Strange signal a few days back: sounded Russian but that antenna was totally inadequate for the task. Surely not.

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Anonymous user #30
467 days ago
Score 0+-
Hi. Any idea what this might be? https://my.m...e/rjwsyy.mp3

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Arclamp
467 days ago
Score 0+-
could you give us a frequency?

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Anonymous user #30
463 days ago
Score 0+-
It's on 153 MHz, Eastern Europe.

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NickH
459 days ago
Score 0+-

Can someone help me identify what this is? https://file...fi511wv3buyn
It appears at 25.9065 MHz, any lower and it immediately cuts out. It goes to about 28 MHz before gradually petering out. This is from the Blanco area in Texas.

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NickH
459 days ago
Score 0+-
Specifically I'm referring to the bands of interference appearing across the selected spectrum.

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Anonymous user #31
379 days ago
Score 0+-
...

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Platinum.boi
342 days ago
Score 0+-

Hey Junaid,

what exactly do you mean by an article idea for a guest post at your website? If I undesrstood you correctly, your want to write an article for this website that will be visible to guests or am I confused?

While im not (yet) a mod here, I suppose I could have a look at the article and see if they are any good. I mean with these wikis, the more the merrier when it comes to articles, so sure send some.

That said, a lot of articles here appear half ased, so I guess you could also work on fixing some up.

How exactly will you be able to share the article drafts you have?

Also, im pretty sure you can just edit articles anyway, so why the post when you can put yourself into the citation?

Either way, talk to the admins and or send me the articles to [email protected] as I am new here.

Best regards,
Ivan Rodionov

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Anonymous user #32
310 days ago
Score 0+-
Regarding the unidentified signal 863p151p150. This is the signal from a Neonate baby monitor or similar. I just made a recording of the signal coming from: https://neon...ts/bc-5700d/ and it looks exactly like it.

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Cartoonman
309 days ago
Score 0 You
Could you add the recording of the signal to the page?

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Anonymous user #33
303 days ago
Score 0+-
Very intereting page . i think now it covers all as mentioned in the Kling's and Wavecom's guide and much more.

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Anonymous user #34
280 days ago
Score 0+-

Hi does Artemis 2 identify off-air real-time signals or is it a stored reference database? Thanks for your kind help.
Dave G7GZC

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Aco
279 days ago
Score 0+-

Hi, Nope. Artemis 2 is a static offline database. It is not meant to be a decoder or an automatic identifier for unknown signals. Artemis 3 will be out after the beta test phase. Be patient a few days ;) Cheers,
Marco

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Arclamp
202 days ago
Score 0+-
we need some peeps to get some of the requested signals

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Anonymous user #35
200 days ago
Score 0+-
Very interesting page with lots of sounds and screenshots. Kling informed me this page long ago the time i asked them for some unIded signals and sounds

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Anonymous user #36
181 days ago
Score 1+-

Just heard an unidentified and rather strange signal around 4800KHz, the waterfall of the signal can be seen here

https://postimg.cc/p9b2ZfGf

and it can be received (at least its currently on air) using this SDR

http://south...=4795.00amz6

I've no idea about what such a signal may be, tried looking at your identified and unidentified signals to no luck; does someone have an idea about what that signal may be ?

My only guess is that, given that using the same receiver it's possible to hear a VOLMET on 5450KHz

http://south...5450.00usbz6
that signal may be originating from some airport device, but I can't really know what it is, and the fact that it shift in frequency and spacing (seems a DSB signal) is really strange

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MikeAgner
72 days ago
Score 1+-
Please correct the entry for MIL-STD-188-110 appendix a. It is not inactive - there were over a dozen such logs in the UDXF for November 2019 alone. Thanks

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Arclamp
44 days ago
Score 0+-
someone needs to remove that link

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Cartoonman
29 days ago
Score 1 You
Thanks, sorry it took a long time to clean up.

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Anonymous user #37
20 days ago
Score 0+-
Unidentified signal - up to 3.4 mW/m2 power bursts every 4s at changing frequencies: 1356 mHz, 1304, 1200, 1307, 1307, 1283, 1301, 1286, 1292, 1319, 1280, 1289, 1292, 1286, etc. Penetrates shielding!

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Anonymous user #37
20 days ago
Score 0+-
can I send a video of the sound?

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Anonymous user #37
20 days ago
Score 0+-
can I email a sound video?

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Anonymous user #38
11 days ago
Score 0+-
The site is taking forever to load