UncleYoda Posted November 30 Report Posted November 30 Anyone know of recordings I could listen to (no videos) to identify the type of digital transmissions I'm hearing? The most annoying one is a fluttering static, but no squeaky modem noises. I'm curious about others too. This is data, not DTMF tones or anything similar (not CW either). Quote
WRUE951 Posted November 30 Report Posted November 30 https://kv5r.com/ham-radio/digital-modes/sounds-of-the-digital-modes/ Quote
UncleYoda Posted November 30 Author Report Posted November 30 Thanks, I'll bookmark that site because I can probably use it later. But none of those match what I'm focused on right now. The closest was MT63 but I've never heard of that. Quote
WRUE951 Posted November 30 Report Posted November 30 4 minutes ago, UncleYoda said: Thanks, I'll bookmark that site because I can probably use it later. But none of those match what I'm focused on right now. The closest was MT63 but I've never heard of that. i sent two sites.. Quote
SteveShannon Posted November 30 Report Posted November 30 43 minutes ago, UncleYoda said: Anyone know of recordings I could listen to (no videos) to identify the type of digital transmissions I'm hearing? The most annoying one is a fluttering static, but no squeaky modem noises. I'm curious about others too. This is data, not DTMF tones or anything similar (not CW either). Here’s a recording of DMR on an analog FM Recording of DMR on analog with call sign..m4a radio followed by the repeater call sign in FM Morse code. Quote
MarkInTampa Posted November 30 Report Posted November 30 Check out the Signal Identification Guide website at https://www.sigidwiki.com/wiki/Signal_Identification_Guide In particular the DMR, NXDN and the different P25 modes. Sound examples are on the webpage. Quote
UncleYoda Posted November 30 Author Report Posted November 30 It's DMR. Kind of what I expected. The links will be useful when I hear other junk. Quote
LeoG Posted December 2 Report Posted December 2 https://www.sigidwiki.com/images/b/bd/NXDN96.mp3 Next Generation Digital Narrowband (NXDN) NXDN is a digital narrowband trunked radio protocol used in commercial, business & industry, transport and Public Safety professional radio systems. 136 MHz — 520 MHz NFM C4FM 6.25 kHz — 12.5 kHz Quote
LeoG Posted December 2 Report Posted December 2 https://www.sigidwiki.com/images/6/64/DMR.mp3 Digital Mobile Radio (DMR) Digital Mobile Radio (DMR) is an open digital mobile radio standard defined by ETSI and used in commercial products around the world. Mostly used by private network and local police, can be encrypted. Used in MOTOTRBO products. 66 MHz — 860 MHz NFM 4FSK 12.5 kHz Quote
LeoG Posted December 2 Report Posted December 2 https://www.sigidwiki.com/images/7/70/Motorola2F1D_Sound.mp3 Motorola Type II Radio trunking control channel. 136 MHz — 941 MHz NFM FSK 16 kHz Quote
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