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Old 04-20-2018, 7:01 PM
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Default P25 static?

P25 phase 1 and 2 are both digital correct? Listening to certain TGs when the car/ portables transmit and don’t have a good connection they sound like a analog radio with a weak signal to a repeater, I thought with digital there was no static it gets “pixelated” for lack of a better term.


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Old 04-20-2018, 7:41 PM
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Quote:
Originally Posted by mdsxfire View Post
P25 phase 1 and 2 are both digital correct? Listening to certain TGs when the car/ portables transmit and don’t have a good connection they sound like a analog radio with a weak signal to a repeater, I thought with digital there was no static it gets “pixelated” for lack of a better term.


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Phase 1 is FDMA, phase 2 is 2 slot TDMA overlaid on the FDMA channel.

There could be digital TG's that are patched, via the console, or other means, with analog channels.

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Old 04-20-2018, 7:46 PM
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Originally Posted by RFI-EMI-GUY View Post
Phase 1 is FDMA, phase 2 is 2 slot TDMA overlaid on the FDMA channel.

There could be digital TG's that are patched, via the console, or other means, with analog channels.

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This is the TG, I was pretty sure they are all phase 2. I’m gonna try to get an audio clip, not that it’s a big deal just curious





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Old 04-20-2018, 8:00 PM
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Default Static

Our statewide system here in Ohio is 700/800MHz P25 phase 1, there are some agencies around me who use VHF analog vehicular repeaters tied to the digital radios. Sometimes when they're too far from the car I hear "static" caused by a noisy signal into the VHF analog receiver on the vehicle repeater. It could be what you're hearing, I'm only guessing since I don't know.
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Last edited by W8VFD; 04-20-2018 at 8:01 PM.. Reason: Grammar & punctuation
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