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G5 P25 Conventional Issue

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jtech48

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Just received my G5 yesterday and having an issue with a UHF P25 frequency.
I programmed in 484.350 along with the correct NAC and P25 Talkgroup of 1 (Verified with scanner and using the digital sq method) and I am unable to receive audio on that frequency, yet the signal bars light up and if I move it around (as if looking for signal) it will cut in and out but will sound like the signal strength is poor yet my scanner picks it up perfectly from the same location. I dont know what other option I can try or if this is something that's known to happen.
 

IAmSixNine

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If you have to move it around for it to pass garbled audio then you may have interference on that channel causing the digitial signal to be messed up.
 

jtech48

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This may not be part of your issue, but keep in mind the G5 uses an internal antenna for V/UHF and not the "whip".


I was going through the threads here and read the one talking about the antenna and I'm pretty sure that's the answer. I wasn't aware it was an internal antenna handling the UHF band


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APX8000

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Yes, UHF uses the internal loop antenna. 7/800 uses the external. I've confirmed this monitoring UHF P25 and 7/800 P25 trunked systems. I'm told the Base unit antenna works off the internal loop but have not personally confirmed that.

Also you can set the talkgroup ID to FFF and see if that helps.


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doctordave

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An interesting observation.... I drove through Baltimore City yesterday and tested the G5 against my Uniden 536 for monitoring of a 700mhz conventional digital frequency - AIR60, which is the state's medevac dispatch/coordination channel. The G5 copied beautifully while positioned fairly near the Xmitter tower - as did the 536. As I drove some distance away, the 536 continued to decode nicely - but the G5 decoded poorly. Surprising. I'm going to do some more conventional channel testing and see if this is replicated. When it comes to monitoring Phase One systems, the Unication devices are the best thing to come along since peanut butter. I really do not anticipate using the Unications for conventional monitoring....my regular scanners handle that just fine.....but these test findings are curious. Will post more after additional testing.
 
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