RRU-1 with long hissing squelch tails.

[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?

[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.

[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!

[brandon]

Cool! Glad to hear ya figured it out.

[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.

[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.

[temfreqhunter]

That was the first thing I tried. After I attempted that, I tried to go into the advanced settings.

[cvrules90]

I don't know what else to tell ya.

[temfreqhunter]

GRRR! Why must this be so mysterious.

[cvrules90]

LOL you might wanna look into some tech support.