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Help me with static / interference sound I'm getting

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UFEMTFF

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I'm scanning this system: http://www.radioreference.com/modules.php?name=RR&sid=195

Every once in a while, it'll get hung up on a talk group (I only scan fire/rescue) and it'll emit the loud "staticy" or "digital garble" type sound. Eventually it'll end, and continue to display the same TG, but I won't be hearing the correct audio. For instance, it'll get stuck on Fire rescue paging, and I'll hear bus drivers or police officers talking after a long period of the static.

Any idea what's causing this?
 

brandon

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Let me guess... your using a PRO-96/2096 scanner?

I've experienced the same thing. There is a bug with that scanner on digital talkgroups. It seems to occur on systems where all the digital stuff is above 30000 or so. I have this happen with the San Diego County RCS --- all analog is below 30000 and digital above. Ditto on the Orange County TRS.... analog is all lower talkgroups and digital is up in the 40000-50000 range.

I looked at your system and its setup just like that. The digital is higher talkgroups above 30000 and analog all lower talkgroups.
 
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UFEMTFF

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brandon said:
Let me guess... your using a PRO-96/2096 scanner?

I've experienced the same thing. There is a bug with that scanner on digital talkgroups above 32000 or so. I noticed that system is setup just like that.
Actually, I'm not. I'm using a BCD-996T.
 

brandon

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UFEMTFF said:
Actually, I'm not. I'm using a BCD-996T.
Wierd. I have not run into this with mine, but I don't get to monitor much digital trunking since I moved out of San Diego. Hopefully someone can provide a solution to your problem.
 

UFEMTFF

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seamusg said:
It's not a P25 system. It has a 3600 bps control channel not a 9600 bps control channel.
I know. My only choices for systems are as follows:

Conventional
Moto Type 1
Moto Type 2 / P25
EDACS
EDACS S.C.A.T.
LTR
RACE

I can't chose Type II only, the choice is combined.
 

slicerwizard

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UFEMTFF said:
Every once in a while, it'll get hung up on a talk group (I only scan fire/rescue) and it'll emit the loud "staticy" or "digital garble" type sound. Eventually it'll end, and continue to display the same TG, but I won't be hearing the correct audio. For instance, it'll get stuck on Fire rescue paging, and I'll hear bus drivers or police officers talking after a long period of the static.
Your squelch is set too low. Noise from local sources (your PC, maybe?) is keeping the scanner on the voice channel.
 

UFEMTFF

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slicerwizard said:
Your squelch is set too low. Noise from local sources (your PC, maybe?) is keeping the scanner on the voice channel.
I thought that, but the only thing that is weird, ist that at the end of the static type sound, I hear both sides of a conversation from another talkgroup on the system.
 

UFEMTFF

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slicerwizard said:
What's weird about that?
Sorry - To be more specific, the scanner is on ID Scan, and I only have 10 TGs programmed. I only listen to Fire, and I'll hear police, bus drivers, or public works after the static.
 

slicerwizard

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No. Status bits have no relation to this issue.

Turning up the squelch, turning on end code detection and eliminating any interference (e.g. by using an outside antenna) will minimize the problem.
 

UFEMTFF

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slicerwizard said:
No. Status bits have no relation to this issue.

Turning up the squelch, turning on end code detection and eliminating any interference (e.g. by using an outside antenna) will minimize the problem.
End code detection is on, I'll turn squelch up a little bit. THanks.
 

scottjh

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Control Channel Noise

UFEMTFF,

I think setting each talk group to digital in place of analog will alleviate the condition you are speaking of. It will most likely be easiest to do this via computer as this setting has to be effected for each talk group
 

scottjh

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Control Channel Noise

One other thought make sure that digital end code is enabled. In the event of a stuck repeater with digital end code enabled the radio will continue to scan when transmission ends.
 
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