LTR Question

[altec]

Hello, Do the frequencies on a LTR system display PL or DPL codes when they are in use?

[DaveH]

No, they should display LTR Group IDs if your scanner can decode them.
LTR systems sometimes mix LTR and conventional (PL/DPL) users on the
same channel, so you could see this.

Also, I've heard that some DPL codes can confuse the low-speed LTR
signalling (and visa versa?) , possibly giving false decodes.

Dave

[altec]

I did a fcc search and programed all the trunked system freqs as conventional to see if any are active. Most are not and can't see any signs of it being a trunked system. Occasionally when activity does occur it displays a dpl code. So I assume there are no LTR systems currently setup in my area.

[captclint]

Originally Posted by altec

I did a fcc search and programed all the trunked system freqs as conventional to see if any are active. Most are not and can't see any signs of it being a trunked system. Occasionally when activity does occur it displays a dpl code. So I assume there are no LTR systems currently setup in my area.

Not necessarily. As Dave said, quite often, a system of repeaters will have 1-2 out of 6-10 total repeaters on conventional mode, usually with PL/DPL and the others LTR. However, you have you examined all the systems in your area, and you did not hear the "spitting" sound every 5-10sec...right? This sound is not guaranteed to be present on an LTR freq, but it is fairly common. I find that systems with this sound can remain inactive for quite a while before they go active LTR.