CAP system and XPR7550's dropping out for 1 second but not recovering

[radioman2008]

for those familiar with the operation of a UHF XPR7550 (family) of radios on a motorola commercial CAP system. a question........

radios key up and transmit. if the RX radios lose the signal for even 1 second, they close the speaker, but their displays still show signal RX of the other unit for as long as they are talking, such as 30 seconds. it doesn't matter far or close to the tower, if signal is lost and comes back, the radios stop producing speaker audio, until the signal finally drops and they re-key up the tower.

think of being on a DMR ham repeater and someone starts talking for 30 seconds and 5 seconds in, their signal drops out for a second, then returns but you don't hear them for the rest of the transmission, AND you can't talk while they are talking even though you can't hear them. it's really annoying.

I want to bring this up to the radio shop but want to be able to provide some suggestions to go with my issues.

 

[TampaTyron]

I would need to see repeater and subscriber firmware and codeplugs. Has the system or subscribers been PM within the last few years? Is it a few radios or every radio? Worse at certain times or days?

This sounds like a "late entry" issue, but one that Cap Plus can deal with assuming rest channel info and timers are correct.

TT

 

[hakwye8518]

Just out of curiosity what's your privacy set to. I vaguely remember something about when privacy is set to none there was issues with late entry.

 

[kayn1n32008]

Is this encrypted or unencrypted?

If its encrypted, is it basic privacy or enhanced privacy or AES?

If the TG is using enhanced privacy or AES, do the repeaters have enhanced privacy encryption checked in their codeplug?

Due to how DMR implements encryption, if you use enhanced privacy or AES, the repeater needs to have enhanced privacy selected in the security tab. If it isn't, what you describe will happen.