LTR Passport Question

[mikebennett]

Can LTR Passport transmissions be monitored if you enter the system frequencies in conventional mode?

[inigo88]

Yes, they just may not make sense... since Passport is a form of trunking you may hear multiple different conversations on different talkgroups back to back on the same frequency, and you'll have no way of telling them apart other than by ear. Also Passport frequencies usually send out an idle burst every 3-5 seconds that sounds like a click as the repeater keys up with dead air, and this can get pretty annoying.

I recommend programming all the frequencies for the site you want to listen to with delay turned OFF (so it won't get stuck on a frequency's idle burst). Then if you're trying to follow a conversation that left the channel, just keep scanning to find it again.

[mikebennett]

Originally Posted by inigo88

Yes, they just may not make sense... since Passport is a form of trunking you may hear multiple different conversations on different talkgroups back to back on the same frequency, and you'll have no way of telling them apart other than by ear. Also Passport frequencies usually send out an idle burst every 3-5 seconds that sounds like a click as the repeater keys up with dead air, and this can get pretty annoying.

I recommend programming all the frequencies for the site you want to listen to with delay turned OFF (so it won't get stuck on a frequency's idle burst). Then if you're trying to follow a conversation that left the channel, just keep scanning to find it again.

Thanks for the info. I pass through one city that has this system but I'm not there long enough to ever hearing anything other than the annoying clicks.

[Skud]

Speak of that 3 to 5 second click. Do you know what the difference with the one that does it every 3 to 5 seconds and the one that does it about once every second?

Originally Posted by inigo88

Yes, they just may not make sense... since Passport is a form of trunking you may hear multiple different conversations on different talkgroups back to back on the same frequency, and you'll have no way of telling them apart other than by ear. Also Passport frequencies usually send out an idle burst every 3-5 seconds that sounds like a click as the repeater keys up with dead air, and this can get pretty annoying.

I recommend programming all the frequencies for the site you want to listen to with delay turned OFF (so it won't get stuck on a frequency's idle burst). Then if you're trying to follow a conversation that left the channel, just keep scanning to find it again.

[Saint]

Originally Posted by Skud

Speak of that 3 to 5 second click. Do you know what the difference with the one that does it every 3 to 5 seconds and the one that does it about once every second?

I also get several frequencies in the 460. mhz band that I get the keyup every second, drives me crazy.
Steve

[slicerwizard]

Originally Posted by Skud

Speak of that 3 to 5 second click. Do you know what the difference with the one that does it every 3 to 5 seconds and the one that does it about once every second?

Channels that pulse slowly are either misconfigured, or are not collect channels, or are not PassPort channels.

Collect channels should always be programmed to pulse every second; if they aren't, subscriber radios will take forever to roam from site to site; do the math - [neighbour list with five neighbour sites] x [monitor each neighbour frequency for at least 5 seconds to pick up an idle burst] = you gotta be joking.

Home channels can pulse at a slower rate, since a slow pulse rate would only cause a slight delay in registering for homed radios when they get powered up.