p25 bursts

[mainetrunk]

When I had a pro 96, I noticed that troop A would always get the scanner to stpo on their channel.151.400...I thought by getting the pro 106 would stop that. It did not. It also happens on a few fed freqs. No other police system/county dispatch has thos bursts. Anyone got any info? You can hear it best on any kind of analog scanner. ( that noise ) 1 second burst.

 

[ChrisP]

I think these bursts are used by systems that offer the "vote-scan" feature. Wide area system repeaters seem to signal their presence by these short bursts, and it lets the mobile radio automatically know what repeater is in range and what frequency to use. That way the user doesn't have to change channels manually.

And these bursts seem to use the same P-25 NAC as the voice traffic, so you can't avoid them.

I hear these bursts on several federal agency channels that are part of a wide area network...

- Chris

 

[WX1N]

You may be hearing the MDTs (mobile data terminals). Last I knew, NHSP used the same frequency for MDTs that they do for voice communications. If I remember right, you could trick the Pro-96 into ignoring these transmissions by setting the channel mode (not the bank) to MO trunking.

 

[mainetrunk]

Now that I think about it, there area afew entities here in Maine that has that. It's a click and followed by a round of beeps. Thought it was something like that. Thx--Ron