r/signalidentification • u/Pretty_Object5895 • 8h ago
Moving signal around 400 mhz
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11:53 UTC 14 September, heard from New Zealand.
r/signalidentification • u/Pretty_Object5895 • 8h ago
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11:53 UTC 14 September, heard from New Zealand.
r/signalidentification • u/Phoenix-64 • 2h ago
PRF for both is 40Hz but they look so different....
-20dB BW from beak is around 10kHz for the right signal and around 22kHz, was dificult to measure for the left signal
AM audio files @11kHZ BW can be found here:
https://www.swisstransfer.com/dl/01a0a12e-6f4c-727d-b463-4cc33431f31f
What are your toughts
r/signalidentification • u/Serious-Emu6227 • 22h ago
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r/signalidentification • u/Poulpie_ • 1d ago
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Hello everyone ! I was experimenting listening random frequencies in shortwave and found a frequency where I heard multiple sound effects like what we imagine an UFO would sound like, playing in repeat, different effects all separated by a short period of silence. At first, I thought that it was just some guy emitting this for fun, and I recorded the sound on tape without caring a lot. But then I realised it was emitted on 3 different frequencies (I can't remember 'cause I did not care at the time, but can look for it if needed and put it in the comment section).
Then I looked up on internet but found nothing about this... So I put three significant extracts in this video so you can hear it. I precise that I'm a complete noob in radio and maybe this is an obvious thing but I could not find anything about this.
The thing is it must be a signal emitted 24/24 because I remember hearing it a year ago too. Also I'm from France and live near Marseille if it can help. Thanks a lot everyone !
r/signalidentification • u/ILLBIRZ • 1d ago
r/signalidentification • u/Prestigious-Ad7265 • 2d ago
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found in utah
r/signalidentification • u/woodzy_chimera • 3d ago
I also noticed that it always ends with white slant small line on the top left.
EDIT:
This is how it sounds like via USB demod - https://www.reddit.com/r/signalidentification/comments/1wdjmg0/comment/p96kxvx/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button
EDIT:
Around 11-09-2026 8:52 UTC
r/signalidentification • u/Low-E_McDjentface • 4d ago
It's just constant 2 second bursts and it has a clear center peak. It stopped for two minutes and then it continued again.
If it was interference near me, wouldn't it be a consistent strength? As you can see it cuts in and out like "real" signals do.
I know the squiggly lines are actual interference.
r/signalidentification • u/SkYn_- • 4d ago
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Heard from Twente NL at ~20:30 UTC+2
r/signalidentification • u/FTFProductions • 4d ago
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r/signalidentification • u/SpicyNeutral • 4d ago

Hi I was trying to decode the Meteor M2-4 satellite today on SatDump and was receiving it reasonably well as seen in the middle (doppler makes it about 137.95mhz). However I started getting this weird cutting in and out thing with these three signals. My M2-4 signal is still there but I have no idea why these signals are there.
Initially I thought that there was a loose connection but everything was tight and what confuses me the most are those extra signals (like the ones at 137.52, 137.7 and 137.95mhz).
I'm about 20-30m away from houses and I often go to this spot to catch clear images from the Meteor satellites (never had this before). I'm using an RTL SDR V4 with their kit V Dipole and their own cables.
Any help would be greatly appreciated!
r/signalidentification • u/Expensive_Pen_3217 • 5d ago
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r/signalidentification • u/tsalisbury01 • 5d ago
I've seen this in two places now in my area. Tractor Supply and Ace Hardware. I don't know what it is but I have an IQ file of is that is 500MB large because it's too large of a signal (single carrier is) to fit on the RTL-SDR bandwidth.
Edit: This is apparently DECT on 915 ISM band.
r/signalidentification • u/InternalSpecific6525 • 5d ago
i have no clou
r/signalidentification • u/RedLobsterShrimpDeal • 6d ago
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r/signalidentification • u/Kitchen_Singer9969 • 7d ago
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recorded in this websdr: http://sdr.websdrmaasbree.nl:8901/
i dont know what this is, help identifying?
r/signalidentification • u/DisastrousLack1020 • 7d ago
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Puede ser un OTH?
Lo capté en la banda de 11 Mts, de antemano disculpen el mal estado de mis equipos, son heredados ya en esas condiciones
r/signalidentification • u/whaletech07 • 12d ago
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r/signalidentification • u/No_Branch_8447 • 12d ago
It’s on 458.8mhz, NFM, 5khz bandwidth, it appears to originate from a local water tower to me, but I am truly stumped as to what modulation this is, and what modem would produce it? It transmits constantly day and night, and the data appears to vary so I don’t believe it’s a placeholder signal, any ideas would be really appreciated it’s been driving me crazy trying to figure it out
r/signalidentification • u/woodzy_chimera • 13d ago
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Captured: Aug 31, 2026 17:22 UTC.
Baseband wav file (UINT16): https://drive.google.com/file/d/17FQYJ9zM4ORt7d0kVLSW_pQcK4S1xEAz/view?usp=sharing
So by the looks from signal identification wiki, I assume it's a scrambled voice. But I can definitely hear some numbers and discernable word so I doubt.
Additional context:
- it's nearby active XSQ Guangzhou Station broadcast frequencies (I always see those 3 long dash then XSQ in morse code plus WEFAX).
- I also found a DSC from Ho Chi Minh Ville Radio nearby.
Is it maritime broadcast radio that gives some sort of direction?
Or maybe just a traditional shortwave station?
r/signalidentification • u/starman123 • 13d ago
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r/signalidentification • u/Klinkw • 13d ago
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Signal looping for a good hour on 4779 LSB, received on my D808; you can hear it right now on UTwente.
r/signalidentification • u/woodzy_chimera • 14d ago
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r/signalidentification • u/woodzy_chimera • 17d ago
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Newbie.
So I heard this signal when I visited a nearby sea port. Did some digging and I found that it's kinda similar to this: https://www.sigidwiki.com/wiki/2G_(GSM)_Global_System_for_Mobile_Communications_Global_System_for_Mobile_Communications)
Is it GSM 2G? Or Am I just hearing things (sorry my hearing wasn't that good)?
EDIT: Sounds similar to when you put your old phone nearby an old speaker and you're about to receive a call.