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Phase 1 vs Phase 2 audio levels

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My county is using a Harris P25 700 MHz system which is a few years old. Recently there have been complaints about having to turn up the volume a few notches from older volume settings.

The explanation given is that "when radios on any digital system (Motorola included) are moved to Phase II a decrease in modulation (volume) is always the result."

Now, we have always had the issue of some radios sounding louder than others, but that could be a combination of mic gain, user voice characteristics, how far away the mic is, etc. I have also heard that this phenomenon exists in other Harris systems; this appears to be an implementation issue and "what we hear is what we get."

But the explanation I quoted seems to imply that radios with Phase II capability aren't as loud as those limited to Phase I when both are used on the system. Which should be operating in Phase I since we have a mix of Phase II capable/incapable radios on the system.

I totally understand the modulation-dependent loudness in an analog system, but - is this also seen in a digital system?

I wanted to check with the P25 experts on this forum before I throw the BS flag.

Thanks in advance.

Joe
 
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