MSF5000 DPL growl

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maxjam
Posts: 124
Joined: Fri Sep 07, 2001 4:00 pm

MSF5000 DPL growl

Post by maxjam »

I have a MSF5000 that started life as a EMS base. I reprogrammed it for repeater and disabled all options for remote control, etc. I disconnected the wildcard options from the bus. It works/sounds great, however we are using a DPL and the receivers have a low level growl. Many different portables and mobiles. Using PL or carrier it is nice and clean. I have followed the book's alignment procedures and it didn't change a bit. It is around 1Khz of deviation. I have not noticed the grown on another repeater that also uses DPL.

Thoughts and or suggestions?
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xmo
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Joined: Fri Oct 12, 2001 4:00 pm

Re: MSF5000 DPL growl

Post by xmo »

Distorted DPL and over-deviation of the DPL [target is 800 Hz deviation] is almost always caused by failure to properly perform the modulation compensation alignment.

This step is often missed when performing a station alignment and is especially important when the transmit frequency is changed.
maxjam
Posts: 124
Joined: Fri Sep 07, 2001 4:00 pm

Re: MSF5000 DPL growl

Post by maxjam »

I thought that might be the issue. I went back today and double checked that. What I saw on the monitor matched right up with Figure 4-17 on page 4-28 to the Tee for the correct waveform.
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d119
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Joined: Tue Mar 19, 2002 4:00 pm

Re: MSF5000 DPL growl

Post by d119 »

What is the stations frequency error?
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