462.675 (CH 20) Data/Telemetry

[tweiss3]

I was bored on the way home from work (scanner was slow), so I flipped over to GMRS. On channel 20, I kept hearing a approximately 3s burst come across the radio: https://drive.google.com/file/d/1zzv_86znSQPPI0RYIFJiZ7p20m9VUyHM/view?usp=sharing

 

This repeated every minute for the 10+ minutes I had left to get home, so I recorded it.

 

I jumped on the FCC to do a search for this frequency, and got zero results with location and radius of 50 miles. Any idea what it is?

[JohnE]

DMR.
 

[tweiss3]

In testing the DMR theory, I grammes my 878, turned it on, tuned to the frequency, turned on the digi monitor, and it recognizes there is a signal, but does not decode it as DMR.

[JohnE]

if it is set as a cap + it "pulses" and there won't be any data there.