Scott Weis wrote:
I've been listening on the LA hub and noticed that the systems on there don't have a squelch tail after each receive. I have always had one no mater what radio I've used. My current config is as follows: 1 pair of Icom F221 radios (Full duplex), 1 URI and on Dell PC running ACID (Updated to latest ACID asterisk release.) The COR is hardware from the radio. PL is DSP. What is everyone else doing different?
Thanks & 73 Scott KB2EAR
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Hi Scott, There could be a couple of things that could cause this: 1. COR always asserted from the radio, and carrier detect depending on CTCSS decode only. Check for signal swing on the COR line with a voltmeter or a scope and make sure it swings below 0.3V and above 3V for signal and no signal conditions. 2. There have been reports that when external COR is used with internal DSP CTCSS decode, that the system doesn't respond as quickly as when DSP is used for both CTCSS and squelch, or when an external decoder is used for both CTCSS and the radio's squelch circuit is used. None of this is confirmed so if you could confirm it, that would be useful. As a test, try using external COR and CTCSS or a combined signal and see if that eliminates the squelch tail. Steve WA6ZFT