Signal Identification Guide

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This wiki is intended to help identify radio signals through example sounds and waterfall images. Most signals are received and recorded using a software defined radio such as the RTL-SDR, Airspy, SDRPlay, HackRF, BladeRF, Funcube Dongle, USRP or others.

Editing: Anyone can edit this wiki, so if you see missing or wrong information please feel free to correct it by clicking the 'edit with form' button at the stop of the signals page. When doing an edit you will be asked to answer a very simple spam prevention question which will appear at the top of the screen after clicking on Save page.

Adding a Signal: If you would like to contribute an example signal, or identify an unidentified signal please consult the Adding An Example Signal page for instructions. If for some reason you cannot use the form, please contact me at rtlsdrblog__AT__gmail__DOT__com and send a waterfall image, sound or small IQ sample and any information about the signal that you have. Note that it will probably take me 3 - 6 months to get to your signal.

Discussion: You can also discuss the signals by using the discussion tab at the top of every page, or just by using the comments box at the bottom of this page (note that the comments section will be periodically pruned to reduce its length).

Software: There is now the Artemis software available which can be used to display the known reference signals in an easy to access offline format.

== Browse Categories ==

Browse Categories

Frequency bands.png

VLF.png LF.png MF.png HF.png VHF.png UHF.png

Testing.png

AllSignals.png Unid.png
Military.png Radar.png Active.png Inactive.png Amateur.png Commercial.png
Aviation.png Marine.png Analogue.png Digital.png Trunked.png Utility.png
Satellite.png Navigation.png Interfering.png Requested.png Numbers.png Time.png
== Search Database ==

Search Database

Remember to enter units (Hz, kHz, MHz, GHz) if searching by frequency.

Title
Frequency range
Location

Mode

Modulation

Sort by order



Comments

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


Anonymous user #1

416 days ago
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unknown 469 is a signal from wireless alarm monitoring services. Homes and businesses with alarm systems can have a wireless transmitter for backup or for locations without a phone line.

Anonymous user #2

416 days ago
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unknown 550 is most likely noise from the USB interface of a PC or noise from a monitor. I have seen a very similar signal and found it to be noise from the PC.

Anonymous user #3

408 days ago
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I'd like to put in a request for info and signal sample on RD-LAP and also on the Motorola MDT signals that preceded the 19.2 kbps rdlap, such as MDC4800.

This is sold by Motorola as part of their DataTAC network package. It used to be active as part of the ARDIS network nationwide, but I believe that has all been retired (maybe still used somewhere? Not 100% sure)

Also, it is still used by some police departments and others with private datatac networks.

Anonymous user #4

399 days ago
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Unknown chirping 2 I've been seeing something very similar on 936.924MHz USA Virginia.

Anonymous user #5

347 days ago
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Unknown 409 is probably APRS / AFSK decodeable with http://sourc...ojects/qtmm/ at FM mode

Anonymous user #6

343 days ago
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Unknown 433

Could be a cheap home weather station. But 433 MHz is full of mystery signals for consumer electronics like alarm remotes and other sensors.

Trevmar

337 days ago
Score 1+-
I have added a page in the infamous Californian electricity "Smart Meter"

Anonymous user #7

328 days ago
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I am listening to an unknown signal on 13505 khz AM mode on 10-5-14 at 11:45 am EST which sounds something like a remote control when aimed at a radio(MW or LW). Pulses are short and seem to be "communicating" with each other(close and distant).

Anonymous user #8

321 days ago
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Unknown 15650 is Crowd-36 and Unknown 28p957 is a short-distance radar.

Anonymous user #9

310 days ago
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I found this web page full of digital signals: http://kb9ukd.com/digital

Listening to theese signals I think that Unknown Chirping 2 could be mmp-4800 but there are also other similar modes like SEAR, SCADA.

Anonymous user #10

308 days ago
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I've found a russian program to analyze signals its name is: Signals Analyzer.

I don't know how to use it but i think that is an interesting program.

Anonymous user #8

289 days ago
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Unknown 24 is an OTHR, specifically the PLUTO II radar.

Anonymous user #8

272 days ago
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The one by IN87RG might not be from his location, it is from the UOT WebSDR possibly.

Anonymous user #11

262 days ago
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FSK441 is missing, so is Olivia, Domino, etc..

Anonymous user #12

256 days ago
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Unknown 40!! I've heard it too.. there is usually something idling.. sometimes the transmission is longer.. one day there was two stations of it. here https://www....=GTIQnC3f5U0

Anonymous user #10

254 days ago
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Unknown 155p6, signal from Turkey, Central Anatolia is APCO25 (P25) Signal.

Vic

248 days ago
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Unknown 72 can be decoded with MultiPSK: BIIS protocol (Binary Interchange of Information and Signaling)

Anonymous user #9

245 days ago
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I found Unknown chirping 2 at cca 447.7MHZ, multiple signals, Slovakia.

Anonymous user #8

240 days ago
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Can confirm "Unknown-1536125", hear it all the time on 462.407 MHz and 173.226 MHz.

Anonymous user #8

238 days ago
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Interesting...live anywhere in the Massachusetts, USA area by chance?

LargeVirus

238 days ago
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Original poster here, no, but I do live in Connecticut. New London County. The 173.226 MHz sounds like a time signal with an incomprehensible identification every 10 seconds, and the 462.407 MHz one sounds like a beacon.

Avsa242

237 days ago
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OP here. I don't know why I hadn't thought of this before, but I did a little Googling and found that the two VHF freq's are registered to an address of a town water supply. Street view shows two water tanks/towers at that address, so I'm guessing this is some sort of monitoring system. Saw your video- the waterfall looks similar, at least, to the one I posted, but it didn't sound to me like the same signal.

LargeVirus

231 days ago
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They all seem very different, yes. But I think they're all the same signal.

Anonymous user #8

240 days ago
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Unknown ionosonde-like is not an ionosonde, but it is a sounder. Specifically, the 29B6 Over The Horizon Radar sounder is pictured on the University of Twente WebSDR, it makes a paddling noise to check if a frequency is not in use. It isn't very effective since it commonly overlaps HAM bands and SW broadcast bands.

Anonymous user #8

230 days ago
Score 0+-
Thanks, i'll update it!

Anonymous user #13

239 days ago
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А это уважаемые товарищи идет канал видео ТВ. Где то рядом на 2 кгц ниже или выше идет звук.

http://www.s...wn_155p5.jpg

Anonymous user #14

95 days ago
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This isn't. TV is wide and this signal is narrow.

Maybe pager.

LargeVirus

220 days ago
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Unknown 148 is POCSAG. First is POCSAG 512, second is POCSAG 1200. Unknown 21p075 is OLIVIA, specifically, OLIVIA 8-250 in the audio file.

Anonymous user #15

220 days ago
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thanks friend

Anonymous user #9

218 days ago
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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.

Zimbabwe490

217 days ago
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how u get 12 mhz bandwidth

Anonymous user #14

166 days ago
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@Zimbabwe490

I meant to say khz not mhz obviously.

LargeVirus

215 days ago
Score 1+-
Unknown Lines is logic trunked radio.

Anonymous user #10

211 days ago
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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.

Anonymous user #16

208 days ago
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Anyone have an EPIRB signal 406.025MHz, GPS EPIRB preferred.

Anonymous user #9

206 days ago
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When i turn on my LCD TV, i see a interference very similar to "Unknown 550"

Anonymous user #10

197 days ago
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All the missing sound samples here: https://mega...GuGFwpEcxfaA

Please let me know if you need more.

Admin

187 days ago
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Thank you! This is a big list it might take some time to go through it though :)

Cartoonman

187 days ago
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I can extrapolate spectra for a good number of them (esp. the MFSK modulation types) from the audio when I have time. The rest can be placed into new pages or added to sections of pages (POCSAG 512, 1200, etc) for different modes of the same modulation.

Cartoonman

187 days ago
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also http://kb9ukd.com/digital/ is another good source of signals to add, anon user #12 posted it some months ago.

Anonymous user #13

182 days ago
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please do some waterfall images from this big collection of signals and add it to the database !

big thanks !

LargeVirus

192 days ago
Score 1+-
Unknown 432 - that is indeed morse code. What you have found is in the middle of the 70 cm band, it is a HAM transmitting his/her callsign, their callsign is VK4RBB.

Zimbabwe490

181 days ago
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can i ask why a morse code signal needs to devour so much bandwidth

Anonymous user #8

192 days ago
Score 1+-

Unknown 432 is an amateur radio beacon from VK4RBB SOUTHSIDE AMATEUR RADIO SOCIETY INC PO BOX 294 WOODRIDGE, QLD 4114

Australia

Anonymous user #10

184 days ago
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thanks Anonymous user #9 for this big list of sample signals.

make the sigidwiki the one and only place for signals !

Zimbabwe490

179 days ago
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thanks whoever updated my page i completely forgot about it rfl

Cartoonman

179 days ago
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General Question: I'm gauging whether to keep a waterfall-only approach to these articles or if including the spectrum (Like California Smart Meter, DVB-T, and Digital SSTV) above the waterfall as a single image is more preferred.

Waterfalls are easier to get than spectrums, but I have noticed that certain signals sorta need the spectrum as it's a defining characteristic to it's ID (e.g. ATSC and trunked radio signals).

Or, if this is a better idea, having two separate images; one for waterfall and one for spectrum. Thoughts? I don't want to change any more images till I get a clear consensus on this.

Admin

177 days ago
Score 0+-
I think it would be best to have two separate images. The spectrum doesn't really provide any useful info for most signals, and when it does it can be simply added as an additional image.

Cartoonman

177 days ago
Score 0+-
Thanks for the clarification. I'll go ahead with the waterfalls then, and add a spectrum as an additional image.

LargeVirus

174 days ago
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You, Cartoonman, I like you. Let's be friends. also, Unknown 155p47 is logic trunked radio.

Anonymous user #17

173 days ago
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Haha, thanks :) I have an OCD for neatness and accuracy. And thanks for the ID. Someone'll merge it into the LTR article, if I don't get to it before them.

Cartoonman

173 days ago
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/\ that was me. forgot to log in, as usual :)

LargeVirus

173 days ago
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Cool, any way I can talk to you like Steam or something? =P

Cartoonman

173 days ago
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Hmm my steam hasn't been used in like, months (Busy with life). Search for "Cartoonman". Here's your hint on which one is me: http://puu.s...2f36c02e.jpg

Aco

171 days ago
Score 0+-

Hi Cartoonman, thanks for your excelent work on this wiki. This will help sigidwiki and Artemis database. A big problem is the frequency and bandwidth forms because actually the concept of range is not entirely implemented. If you are interested to this problem, you are well accepted in the forum of Artemis tool (http://marks...fined-value/).

Thanks again for your help.

Anonymous user #10

171 days ago
Score 0+-

Hi

I am planning to capture a signal is called PD signal, whence I done it I will add it. but in case that I need help will any body help?

Cartoonman

171 days ago
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Of course, the admin and other users (like myself) could help you add the signal to the wiki.

Erbo

170 days ago
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Very nice wiki! very helpful! Unknown 40 is very weird.

I'm located in Quebec, Canada near Montreal, lots of signal around, some unknown.

Anonymous user #12

165 days ago
Score 0+-
Unknown 28p597 is IRAN Radar, OTH radar

Cartoonman

165 days ago
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Thanks! Do you happen to have a link or some source to verify? OTH's are hard to properly ID, so many different ones, and they don't tend to follow general rules.

All i could find was http://www.i...dar-2012.pdf, but their sample didnt sound like this; who knows, IRAN might have developed more than this since the article.

MikeAgner

163 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...

Cartoonman

163 days ago
Score 0+-

Hi Mike! Thanks for noting these mistakes!. As much as I try to verify the validity of a signal, its pretty hard research.

a. Yup, Crowd 36 (aka Serdolik) has been on my list of fixing. Feel free to edit it though, take it off my agenda :p

b. Wow, thanks for the clearing up. I did find it odd that I couldn't find much information on DIGTRX as a signal. RDFT is the actual signal i take it? I've had trouble finding details on it.

MikeAgner

163 days ago
Score 0+-
Oops - RDFT = Redundant Digital File Transfer...my bad...

MikeAgner

162 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

Anonymous user #18

162 days ago
Score 0+-

Hi All,

I have sound signal file. Need input.

http://we.tl/Xg1xwkNqTK ( Location of file )

Cartoonman

162 days ago
Score 0+-
That seems like a harmonic, not an actual signal, or if it is, it's an idling channel. perhaps this is what you found? http://www.r...is_a_birdie/

Cartoonman

161 days ago
Score 0+-
On second analysis, that does seem to be a sort of data link. Looks curiously similar to the mystery 3x PSK signal, but it's not exact. I'm not sure what this signal is, I haven't seen it before.

Anonymous user #19

161 days ago
Score 0+-
Any other input or idea on how to figure out ?

Cartoonman

160 days ago
Score 0+-
If you can post the IQ file of this signal here, or on reddit.com/r/signalidentification/, then it will be possible that someone who has seen it before will identify it.

MikeAgner

160 days ago
Score 0+-

I'd be willing to fix the Serdolink,DIGTRX and HM01 articles, but (correctly), I can't touch the main page that they link from - so these new articles would be lost (orphans).

Suggestions? Mike

Cartoonman

160 days ago
Score 0+-

Oh lol, thats not a problem. What happens is, the main page actually gets automatically updated every 24 hours. The tag that makes a page appear on the main page is, so as long as that tag exists in the article, by the next server "re-syncing", the article will be placed on the main page.

This only comes into effect when moving the name of the page. for example, moving the page Serdolink to Serdolik. Things like changing the waterfall image, bandwidth, frequency, and description are all done as you do it by direct linking, no need to wait for a server re-sync.

Cartoonman

160 days ago
Score 0+-
oops, the tag is "Category:Signal". Articles (like ones I just moved a few minutes ago) will have their former entries on the home page removed, and the new entry with the "Category:Signal" tag placed back on the main page with their new name. I just moved Amateur Morse Code Beacon so you can take a look at that for an example.

MikeAgner

160 days ago
Score 0+-

OK let's say that I used the 'MOVE' tab to rename the Serdolink article to Serdolik. If the entry is then re-indexed, it appears that all the data that was associated with the old entry on the main page is lost (as the beacon article you just moved currently is). That's not a very good scenario.

In addition there are a number of incorrect frequency references on the main page that should be fixed. For example, there is a very specific set of frequencies that HFDL uses that is listed in a PDF file found in the article - the '2.9 Mhz,29 Mhz' listing is misleading since it reads like it could be just those frequencies, and that's simply not true. Another example includes those modes listed as '3 Mhz, 30 Mhz', and again, that's very misleading, since it leads a reader to think that those specific frequencies are used.

Mike

Anonymous user #20

160 days ago
Score 0+-

Yes that is correct, when the article is moved, all data that was in the old article's location is copied to the new article's location, and the main page's link to the data from the old article is broken. However, this is automatically resolved every 24 hours by the server, as the server resync's articles that have the "Category:Signal" tag, so what happens is, the old article that was truncated of data is removed from the main page, and the new article with the "Category:signal" tag is added to the main page. Sorta like a swap.

The frequency issue is a known thing that me, the admin, and developer of Artemis Aco are aware of. For the time being, the drive is going towards listing frequency range of where the signal exists instead of individual frequencies (since for many of these signals, they can appear at so many different frequencies that it would be pointless to list them all). The format of the site is due to undergo some changes to fit this push, so for the time being, I think that's the direction we're headed with the frequencies. Same goes for bandwidth, for signals that have a range of bandwidths.

Cartoonman

160 days ago
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/\ I wasn't logged in. this is me. oops lol.

MikeAgner

160 days ago
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What you could do in the case of the HFDL listing is to say something along the lines of 'See Article' in the 'Frequency' column, and let the article itself handle the link for the frequencies. They do change occasionally, and it's usually reported on the HFDL and/or UDXF Yahoo groups

As to the ham stuff - while there is some variation due to different regulations in other countries, amateur radio digital freqs are fairly restricted to certain parts of the bands, at least in the US. Examples of this include the 5 Mhz allocation the US shares with a few countries, but not everyone worldwide has access there. Another one is the 70 Mhz band allocated in the UK, but not in the US.

This website has a basic bandplan, along with the new 5 Mhz allocations that were changed just recently...

http://www.a...-allocations

and this one lists a ton of amateur modes and where they can be found. Again, it's not necessarily complete, but it's far better than just saying '3 Mhz, 30 Mhz' or some such...

http://bandp...php?band=All

Perhaps these links could be put in the writeup at the top of the page, then for each of the amateur mode listings, for the HF frequencies, point the reader to these.

Mike

Anonymous user #20

160 days ago
Score 0+-

You make a very good point; for most cases these frequencies are confined to amateur bands designated by regulations.

I think your idea is great, putting these links under the Frequencies section. You may have to figure out all the little intricacies of different region's band allocations though.


For signals that aren't solely amateur though, especially ones like ALE or OTH that are extremely erratic, or even ionosondes, listing the range that they are found at in the way I mentioned above in my previous comment /\ is, to me, the best way of defining their 'frequency'.

Cartoonman

160 days ago
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/\ I wasn't logged in. this is me. oops lol.

Cartoonman

160 days ago
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The only little problem that can come up, and this is subject to debate since I'm not an expert in Ham Radio, but individual frequencies of where these signals can be found could potentially change as time goes on, so they will require consistent updating, either by the site owners linked, or by users on this site.

Cartoonman

160 days ago
Score 0+-
Also, just for the record, http://qrg.globaltuners.com/ <- they have done an outstanding job with categorizing signals found at specific frequencies that are even geolocated. Perhaps we could point users to use their database when looking for specific frequencies of certain signals.

MikeAgner

160 days ago
Score 0+-

Ham radio frequencies tend not to move a whole lot - yes there are regulatory changes from time to time, but the basic ranges - which that 2nd article would be quite useful for, in the case of HF frequencies - remain pretty much unchanged for quite a while. If the frequency ranges were in the article rather than the main page, it would be a snap to fix.

The problem I see here is one of interpretation - if someone who is new sees something that says '3 Mhz, 30 Mhz', then they might think those 2 specific frequencies are the ones to check, when in fact that's incorrect.

What I might suggest for clarity is to say 'Any HF 3-30 Mhz' which is somewhat better.

For those modes that aren't ham-related nor broadcast-related, (or higher than 30 Mhz), the Utility DXers Forum Yahoo group is really the place to check for things like this. It's a very active group and has LOTS of digital stuff reported very frequently

Mike

Cartoonman

160 days ago
Score 0+-

Yup, the 3 Mhz , 30 Mhz is due to be dealt with soon. The admin will figure out how to go about fixing it so that it can display ranges.

I haven't visited the forum before, I'll give it a go, thanks!

MikeAgner

160 days ago
Score 0+-

ok I MOVEd Serdolink to Serdolik. Let's see if the server catches up in a day or two

Mike

MikeAgner

159 days ago
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OK this a bit more of a thorny problem. There are 2 articles - 'Cuban Numbers Station HM01' and 'DIGTRX' which basically describe the same thing. I can convert one article, but the other is unnecessarily redundant and not needed.

The first question is the reference that should be used- since many of the HF data listed on this page are named by their mode, I would suggest which ever page is to be created would be called RDFT

The next question is which article should be converted? Which ever one I convert, there will still be the other which is unneeded. Mike

Cartoonman

159 days ago
Score 0+-

Pick whichever one you feel would be the least work in redoing. I'll handling the article merging for the other article.

Do try to keep as much content that's relevant as possible in the article, (like, for example, leave the DIGITRX waterfall and sound sample and list it as one example of RDFT in a section). Discarding precious information means more time putting it back in later :p. And details are always a plus.

MikeAgner

159 days ago
Score 0+-
OK I'll tackle this tomorrow eve...Mike

Anonymous user #21

158 days ago
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All the signals described here seem to center on one frequency, or on a small set of frequencies. I frequently hear an HF signal, usually on 40m, that consists of digital "noise", rather loud, that either increases or decreases frequency very slowly (maybe by one to ten Hz per second). It never seems to interfere with amateur QSOs, maybe because it doesn't stay on one frequency for long. I can't determine the modulation mode just by listening to the audio. -- David Spector, Southern Maine, USA.

Cartoonman

158 days ago
Score 0+-

would they possibly be something like this? :

http://i.imgur.com/0OMkRqJ.jpg

Of course not to this degree, but something like it. Odd spurrs and things. Some call them "worms". Not sure exactly what causes them.

Cartoonman

158 days ago
Score 0+-
I'd say some are most likely ionosondes of some sort, or HF radars or testing signals.

Cartoonman

158 days ago
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There are also, and I've seen these on the websdr at Univ. of Twente, lots of freq hopping blips, that im sure are coming from radars or research transmitters. Those are a bit harder to categorize, since documentation on them may be sparse to non-existant, and tracking them may even be harder

MikeAgner

158 days ago
Score 0+-

All right, I did the move of the Cuban article, rewrote it, combining the DIGTRX article and the data I had - the move didn't take. No new entry was posted on the main page; however there is a redirect from the Cuban link to the RDFT article.

Something got hosed here...but what?

Thanks...Mike

Cartoonman

158 days ago
Score 0+-

The move did take. The homepage, as stated before, does not update in real time. It takes a day (about 3-6am EST is when the sync happens from my estimates) for the homepage to update. I checked the logs and you moved the Cuban page to RDFT, as stated.

In about a day, the old Cuban link will be removed, and RDFT will be added to the home page in it's place, assuming you kept the "Category:Signal" tag in the article.

Notice that an article I'm currently working on, SSTV (Slow-Scan Television) is not on the home page, despite being made. Without the Signal tag, it will not be read by the server to be added to the main page.

Cartoonman

158 days ago
Score 0+-

You can see the server's activity "log" here: http://www.s...ecentChanges

I use this all the time to make sure changes I made went through, as well as to keep track of changes made to articles made by other users, in case of a need to fix them up or move them around.

MikeAgner

157 days ago
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For the Olivia article, you can find samples and screenshots on these 2 webpages;

http://www.o...iviaView.htm

http://www.w...es/index.htm

Click on 'Olivia' from the left frame

Cartoonman

157 days ago
Score 0+-
Haha, thanks! I actually saw the second one. I plan on spending a lot of time with fldigi to make waterfalls for these modes. Its what i've been looking for to use for MFSK. I'm still debating how I will organize this large collection of signal modes, since in reality, only a handful are used with any frequency (PSK31, MFSK16, etc)

Cartoonman

157 days ago
Score 0+-
If you have any ideas, shoot em my way.

Admin

157 days ago
Score 1+-

Hi Guys,

Just letting you know that we'll be making changes to the wiki over the next few days to add some features like forms (so users who don't know wiki syntax can add a signal easily), and to implement things like frequency ranges on the main page for Artemis etc. So during this time the wiki might look a little broken. You can still add information to the wiki, but just be aware that the main template will be changing soon. When its done i'll make sure all the pages are updated and cleaned up.

Admin

144 days ago
Score 1+-
Just a quick update. Most of the changes are almost done, and the front page should be back to normal operation soonish too.

MikeAgner

156 days ago
Score 0+-

Cartoonman - there are a lot of screenshots and audio samples of MFSK stuff on the fldigi site as well - just pick that from the left panel.

If you're up for fixing the main page along with the upgrades, I'd like to send you a list - there's a fair amount of misunderstandings and stuff that's just wrong - but it's way too much to put on a simple text messenger like this. To where should I send it?

Mike

MikeAgner

156 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

Cartoonman

156 days ago
Score 0+-

Yup. The screenshots on the site are sorta too small for this website, and not the best resolution. I have a method of extracting spectra from audio, so it's not a problem.

Ooo, if you have fixes, you can put em in my talk page here: http://www.s...k:Cartoonman

And thanks for that link! I haven't seen this before but I have taken a look at some of the links they have.

When I wrote these articles, the main goal was primarily to get the signal up on the site (properly ID'd as much as I could verify), and put some information I found with it. Fact checking would simply take too much time and would end up with even slower submissions of signals than I am currently doing now. I would love to have other users write up factually correct and accurate descriptions for these signals, as it frees up my time to focus on IDing and adding signals, including getting good audio samples and waterfall images. A lot of my time is spent just trying to verify if the signal I have is what I think it is.

Cartoonman

156 days ago
Score 0+-
Btw, this isn't to say I don't fact check at all, I do fact check, but understand that I commonly find conflicting sources on information for these signals so it becomes a rather involved task sifting through misinformation; its inevitable that some will get through.

Anonymous user #7

139 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

Cartoonman

129 days ago
Score 1+-
I will look into this as soon as I get a chance, thanks!

Admin

129 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.

Anonymous user #22

91 days ago
Score -1+-
1 fucking dollar to upload a god damn file to your shit site. Everyone is just trying to help everyone out and you have to pull this greedy eurotrash bullshit. don't even try to pull the web hosting cost bullshit because we all know its crap. if you really cant afford it take the fucking site down.

Admin

91 days ago
Score 0+-
I'm not sure what you're talking about, there's no fees for anything on this site.

Cartoonman

90 days ago
Score 0+-
Um, where exactly do you see this fee to upload? If I had to pay a dollar every time I uploaded, I'd be in worse debt than Greece.

Cartoonman

90 days ago
Score 0+-

Oh wait he's actually right LOL. http://puu.s...f72ab2cc.png <- screenshot of the issue.

Apparently, if you aren't signed in, and you try to upload a file into the form, it says "You must $1 to upload". Must be because non-registered users cannot upload, so there's some bug when they're given an upload screen.

Cartoonman

90 days ago
Score 0+-
haha, apparently the mediawiki code for a link to the log in page is literally "$1". Thats quite ironic.

Admin

89 days ago
Score 0+-

Haha wow so he was kinda right. Yup, the $1 is mediawiki code, not money, whoops. I'll get the dev to look into this bug, Thanks.

I think I'll allow non regged users to upload, hopefully there won't be any spam.

Admin

88 days ago
Score 1+-
Okay this should be fixed now, sorry for any confusion. I've decided to not allow non-logged in uploads, since we've already had a couple of spam images uploaded in the past.

Anonymous user #23

75 days ago
Score 1+-
Maybe someone could add Autex from MultiPSK.

Anonymous user #13

72 days ago
Score 0+-
obviously like your website however you need to check the spelling on several of your posts. Several of them are rife with spelling issues and I to find it very bothersome to tell the truth on the other hand I will definitely come again again.

Anonymous user #13

68 days ago
Score 0+-
This site is fantastic but could really be developed - there are so many different types of signal - if I catch something that I can tell is a certain type of stanag for example, or some particular type of modem, better to help newbies and radio pros navigate quickly to the signal they're looking for rather than have to scroll through all the stuff above..

Admin

64 days ago
Score 0+-
I'm always open to ideas to improve. How would you suggest we do something like this? At the moment the sidebar search function works pretty well for searching for something like "stanag".

Cartoonman

63 days ago
Score 0+-

I've had plans to figure out a way to rework the Category system so that we can begin to group signals up based on key features so that it is easier to navigate and find signals of interest. In the past the biggest obstacle was not having enough variety of signals for this to really be useful, but now with over 150 signals, we have enough sample size to make some useful categories.

Currently the category system is a bit problematic as it shares labels with server-based signal and unid signal tags, so it will be messy to create one based on the current system. Descriptive tags will have to be placed in a different category type of sorts.
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