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Author Topic: VHF Low Band Via UK SDR 29.7 MHz - 40 MHz - 23 February 2023  (Read 612 times)

Offline R4002

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VHF Low Band Via UK SDR 29.7 MHz - 40 MHz - 23 February 2023
« on: February 23, 2023, 1456 UTC »
1430 UTC tune in, 1455 tune out. - lots of Asian fishing fleet radio comms (27.5 MHz - 39.475 MHz 25 kHz spacing for 480 channels, FM mode, carrier squelch).  Apparently an "export" variant exists that narrows the channel spacing from 25 kHz to 12.5 kHz.

29.8000 MHz FM - POCSAG paging signals POCSAG pager
29.8250 MHz FM - Asian fishery radio - 29.8250 MHz FM [CSQ] Asian fishing fleets
29.9000 MHz FM - POCSAG paging signals POCSAG pager
30.0000 MHz FM - FM carrier - does not appear to be a military signal (narrower FM than usual mil signals)
30.0250 MHz FM - Asian fishery radio - 30.0250 MHz FM [CSQ] Asian fishing fleets
30.3000 MHz FM - Asian fishery radio - 30.3000 MHz FM [CSQ] Asian fishing fleets
30.3250 MHz FM - Asian fishery radio - 30.3250 MHz FM [CSQ] Asian fishing fleets
30.5500 MHz FM - Asian fishery radio - 30.5500 MHz FM [CSQ] Asian fishing fleets 
30.7600 MHz FM - US land mobile - automatic CW ID (Morse code ID)
30.7250 MHz FM - Asian fishery radio - 30.7250 MHz FM [CSQ] Asian fishing fleets
31.1000 MHz FM - Asian fishery radio - 31.1000 MHz FM [CSQ] Asian fishing radio chatter
31.1500 MHz FM - Pager - burst transmissions
31.1600 MHz FM - US land mobile - sounds like business comms
31.2000 MHz FM - OTHR Over The Horizon Radar - very strong - 30-35 kHz wide
31.3250 MHz FM - French traffic control system data link  - poly tone data signal
31.4000 MHz FM - Asian fishery radio - 31.4000 MHz FM [CSQ] Asian fishing fleets
31.5750 MHz FM - "Chirp" carrier - rapidly changing frequencies within a 5-10 kHz window
31.6000 MHz FM - Asian fishery radio - very busy 31.6000 MHz FM [CSQ] Asian fishing fleets
31.6875 MHz FM - French traffic control system data link - poly tone data signal
31.7250 MHz FM - UK On Site Hospital paging systems - POCSAG pager signals
31.7500 MHz FM - UK On Site Hospital paging systems - POCSAG pager signals - busiest freq
31.7750 MHz FM - UK On Site Hospital paging systems - POCSAG pager signals
31.8000 MHz FM - Asian fishery radio - 31.8000 MHz FM [CSQ] Asian fishing fleet radio chatter
31.9750 MHz FM - French traffic control system data link  - poly tone data signal
32.4000 MHz FM - Data bursts - multi-frequency shift keying
32.4500 MHz FM - Asian fishery radio - 32.4500 MHz FM [CSQ] Asian fishing fleet radio chatter
33.3000 MHz FM - Asian fishery radio - 33.3000 MHz FM [CSQ] Asian fishing fleet radio chatter
33.4250 MHz FM - Asian fishery radio - 33.4250 MHz FM [CSQ] Asian fishing fleet radio chatter
33.5600 MHz FM - US fire rescue dispatch and operational comms
33.7400 MHz FM - US fire rescue dispatch
33.7500 MHz FM - POCSAG paging bursts - very short bursts
33.8000 MHz FM - US fire rescue dispatch
33.8600 MHz FM - US fire rescue dispatch with tone outs
33.9000 MHz FM - US fire rescue dispatch "600 East..." "...601" (possible callsign)
33.9400 MHz FM - US fire rescue dispatch
33.9800 MHz FM - US fire rescue dispatch
34.6875 MHz FM - French language - land mobile radio comms
34.7625 MHz FM - French language - land mobile radio comms
34.8250 MHz FM - Data bursts - maybe a pager?
34.8750 MHz FM - French language, weak
35.2250 MHz FM - French Autoroute voice + data radio system
35.2375 MHz FM - Data signal - very strong
35.5500 MHz FM - POCSAG pager paging signal 35.550 MHz FM
35.7600 MHz FM - US land mobile (business comms)
35.8200 MHz FM - US land mobile (business comms)
35.8250 MHz FM - French Autoroute voice + data radio system
35.9875 MHz FM - French Autoroute voice + data radio system
36.0500 MHz FM - Data signal - with FM voice underneath?
36.1000 MHz FM - Digital signals - characteristic of digitally encrypted military comms
U.S. East Coast, various HF/VHF/UHF radios/transceivers/scanners/receivers - land mobile system operator - focus on VHF/UHF and 11m