Troy Fire

[N2YQT]

I've been spending some time in Troy and have been monitoring the Troy Fire 460.4750 frequency. When a mobile unit is on the air what is the digital sound underneath the voice? I searched the forums and the emissions designators for the frequency but no clues there. I'm sure one of you more familiar with the equipment they use can help.

 

[62Truck]

I've been spending some time in Troy and have been monitoring the Troy Fire 460.4750 frequency. When a mobile unit is on the air what is the digital sound underneath the voice? I searched the forums and the emissions designators for the frequency but no clues there. I'm sure one of you more familiar with the equipment they use can help.

Probably MDC-1200 or Kenwood Fleet Sync

 

[DaveNF2G]

Funny, I've never checked that one. It might be GE*Star. I'll check it out and post here when I find out.

 

[N2YQT]

You'll have to listen. It's definitely not a normal ANI burst. It runs along with the voice and there is a trialing tail. Like if you listened to a P25 or DMR repeater just before it unkeys. Unfortunately I haven't been in a position to record it or run it through DSD+.

 

[ff026]

Definitely pre MDC 1200 and just sounds like line noise coming out of the comparator from the aux/satellite receivers.

Update: definitely noise coming from a receiver heard a few transmissions when there was nothing after a unit unkeyed and a few when it did.

 

[Com-Tech51H8]

I’m decoding all transmission under MDC and getting uids back

 

[N2YQT]

Thanks guys!