Pro-96 Trunking Issues

[Griggs]

I recently reprogrammed a Pro-96 for a new P25 Phase 1 system in my county.

Mercer County Interoperable Public Safety Radio System Trunking System, Mercer County, New Jersey - Scanner Frequencies

I am having trouble picking up the transmissions on this new system. It will lock in on the talk-group when there is a transmission, however all I get is static or a low humming noise. To my knowledge this model scanner should pick this up without any issues. I have upgraded the firmware to 1.4 as I was told there might be an issue with the old firmware, but no luck

I have other trunking systems in the scanner and they are picking up perfectly with no issues.

Any ideas or insight would be greatly appreciated.

 

[Ronaldski]

While on the system, push MAN and observe the percent signal your getting. If your close to a tower say within a few miles it should be I feel 90% or so.

This may not be the problem, but many have fallen into this problem,
So many pro96's are long in the tooth and many suffer from 800 MHz drift.
Try doing a search that is 1 MHz below and above from the control channel frequency. If you find your getting a strong signal from the tower off frequency, most likely it needs a vr4 adjustment internally.

 

[talkpair]

Have you tried programming any of the voice channels in as conventional channels?

That should eliminate 'drift' as being the problem.

I would think that if you are hearing other P25 systems without any problem, then this one should work as well.

Also.......when the scanner stops on a talk group, look at the frequency on the display to see if it matches a valid voice channel in the database.

 

[KevinC]

Couple of things to add...

I see almost all of the Law Enforcement TG's are listed as being encrypted.

Judging by the WACN this is a Harris system, they sometimes don't broadcast the bandplan so check to be sure it matches what's in the database (assuming that is correct).

 

[DickH]

... Judging by the WACN this is a Harris system, they sometimes don't broadcast the bandplan ...

What do you mean by "the bandplan" ?

 

[talkpair]

------------------------------------------------------ 
            Mercer County Custom Table for                                
            Radio Shack Pro-96 / Pro-2096
------------------------------------------------------
           Low     High             Base
Table     Chan     Chan   Offset    Frequency    Step
------------------------------------------------------
  1          0     4095      0      500.45000    12.50

From what I can tell, the second line of the table listed on the database page isn't used.



Reference: http://forums.radioreference.com/ne...m/227444-mercer-county-trs-3.html#post2199884

 

[KevinC]

What do you mean by "the bandplan" ?

The algebraic formula for computing a frequency from a channel number.