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RRU-1 with long hissing squelch tails.
Posted: Thu Jun 09, 2011 8:31 pm
by temfreqhunter
After a user (dispatcher or fireman) transmitts on RRU 1, I get a 3 second continuous hiss after their transmission is complete. Sometimes the hissing squelch tails are longer than others, and I have tried using multiple antennas. I tripple checked my configuration in my scanner and it is all correct. Any ideas as to what could be causing this issue?
Re: RRU-1 with long hissing squelch tails.
Posted: Thu Jun 09, 2011 10:34 pm
by brandon
Do you have the PL tone enabled and set to NFM mode?
I know some of the newer GRE scanners had this problem. I don't remember how to fix it but I will take a look at my setting to see if I can duplicate.
Re: RRU-1 with long hissing squelch tails.
Posted: Fri Jun 10, 2011 5:08 pm
by temfreqhunter
Yes, I have both of them. I actually discovered that it was interferance because of metal debris on my roof. So, I relocated the antenna and it went away. Thanks for the info, though!
Re: RRU-1 with long hissing squelch tails.
Posted: Fri Jun 10, 2011 5:16 pm
by brandon
Cool! Glad to hear ya figured it out.
Re: RRU-1 with long hissing squelch tails.
Posted: Fri Nov 04, 2011 3:25 pm
by temfreqhunter
Interestingly enough, I have no debris on my roof now, and the problem has returned within the last week or so. Also, If I remove the PL tone from the object on the scanner, the hissing noise is ongoing and won't stop until dispatch or a user transmitts. The problem also seems to be worse on support 5 calls. Maybe someone could identify the issue if they heard it? I have sample files to share if anyone wants to take a listen.
Re: RRU-1 with long hissing squelch tails.
Posted: Fri Nov 04, 2011 4:38 pm
by cvrules90
You might want to check your squelch. Think of it like a gate. When you raise the squelch, you block weak signals and allow stronger ones. When you lower the squelch, it allows all signals but produces noise in return. Ideally, you shout set the squelch to just after hissing stops.
Re: RRU-1 with long hissing squelch tails.
Posted: Fri Nov 04, 2011 9:24 pm
by temfreqhunter
That was the first thing I tried. After I attempted that, I tried to go into the advanced settings.
Re: RRU-1 with long hissing squelch tails.
Posted: Sat Nov 05, 2011 10:37 am
by cvrules90
I don't know what else to tell ya.
Re: RRU-1 with long hissing squelch tails.
Posted: Sat Nov 05, 2011 2:18 pm
by temfreqhunter
GRRR! Why must this be so mysterious.
Re: RRU-1 with long hissing squelch tails.
Posted: Sat Nov 05, 2011 4:06 pm
by cvrules90
LOL you might wanna look into some tech support.