So, I have a Quantar that is misbehaving.
No PL/DPL or P25: Machine is just fine!
PL: There is a very noticeable hum. When I turn down the PL/DPL/Slow Speed data adjustment, it does nothing to the hum. Eventually, the subscriber radios will no longer un-mute since they cannot hear a PL (that is when the modulation adjustment is around 4-5%, down from the default 17%). The hum is really bad when the signal is marginal.
DPL: The subscriber radios will not un-mute at all when the machine is using a DPL. This is with the modulation adjustment at the default 17%. Even when I turn the modulation up high enough that you can hear the DPL rumble, it still will not un-mute the radios. The subscriber radios work just fine with other DPL machines.
Just tuned it a couple weeks ago, and everything looked great! I have no idea where to start, and any ideas would be greatly appreciated.
-Jake
Quantar Misbehaving
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- Astro Spectra
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Re: Quantar Misbehaving
I would start with doing a transmit modulation alignment. Discussions:
http://communications.support/threads/1 ... -P-25-help
http://communications.support/threads/6 ... #post48013
http://communications.support/threads/1 ... -P-25-help
http://communications.support/threads/6 ... #post48013
Re: Quantar Misbehaving
That is what it was. Put it on the scope - the lines were so wavy that at first I thought I was in the wrong mode since it just looked like one line, not a higher and a lower one!
Works like a champ now.
Works like a champ now.