DISCLAIMER: In no way am I suggesting this is a fix for reception issues on P25 CQPSK simulcast systems - there are several other tricks/hints (directional antennas, attenuation) that have been suggested. However, I saw this post and it got me thinking:
Yahoo! Groups
This person was having difficulty with non-P25 CQPSK systems and associated Multi-Site settings on their PSR-800, but I'm wandering if this might actually help in the P25 CQPSK situation???
"I read about the PSR-800 data thresholds (set on the Trunked Systems Tab, Multi-Site Settings down at the bottom left). I discovered a workable solution to keep the scanner on the strongest tower most of the time.
As defaults, the Lo value is 88 and the Hi value is 95.
On tower A, which is the strongest, I changed Lo = 70 and Hi = 90.
That ensures control channel sampling should match all the time.
On all the other weaker towers within range I set Lo = 98 and Hi = 99.
That is virtually impossible for the data channel decode rate to meet that criteria unless I am right underneath the tower."
So... if you were to program a P25 CQPSK system as ROAM with Lo = 98 and Hi = 99, would it help force the scanner toward a "tighter decode threshold"???
Just a suggestion - I don't have any system close to my QTH to test. Any feedback on this would be appreciated...
Yahoo! Groups
This person was having difficulty with non-P25 CQPSK systems and associated Multi-Site settings on their PSR-800, but I'm wandering if this might actually help in the P25 CQPSK situation???
"I read about the PSR-800 data thresholds (set on the Trunked Systems Tab, Multi-Site Settings down at the bottom left). I discovered a workable solution to keep the scanner on the strongest tower most of the time.
As defaults, the Lo value is 88 and the Hi value is 95.
On tower A, which is the strongest, I changed Lo = 70 and Hi = 90.
That ensures control channel sampling should match all the time.
On all the other weaker towers within range I set Lo = 98 and Hi = 99.
That is virtually impossible for the data channel decode rate to meet that criteria unless I am right underneath the tower."
So... if you were to program a P25 CQPSK system as ROAM with Lo = 98 and Hi = 99, would it help force the scanner toward a "tighter decode threshold"???
Just a suggestion - I don't have any system close to my QTH to test. Any feedback on this would be appreciated...
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