On 9/7 I was putting away a pair of radios and out of boredom decided to monitor Moto Ch. 20 (last channel I had used) to see if I could hear anything. Sure enough, I heard a series of 3 tones, in quick succession, every 15 seconds. The signal was not picked up by the radio, only audible if I held down the monitor button on my radio.
This was on Moto Ch. 20 which covers the frequency 462.675MHz ("675"). I scanned up and down a few channels but heard nothing elsewhere.
The tones sound like DTMF tones, however the pitches do not match any of the standard tones (1-9, *, #).
Anyone have any ideas as to what this is? It's really piqued my interest.
I've uploaded a recording to SoundCloud below:
https://soundcloud.com/drumz0rz/tones-on-gmrs-ch-20
Thanks!
This was on Moto Ch. 20 which covers the frequency 462.675MHz ("675"). I scanned up and down a few channels but heard nothing elsewhere.
The tones sound like DTMF tones, however the pitches do not match any of the standard tones (1-9, *, #).
Anyone have any ideas as to what this is? It's really piqued my interest.
I've uploaded a recording to SoundCloud below:
https://soundcloud.com/drumz0rz/tones-on-gmrs-ch-20
Thanks!
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