[FedCom] DCS

Tue, 21 Oct 2003 07:53:13 +0000

>From: [email protected]
>Reply-To: [email protected]
>To: [email protected]
>Subject: [FedCom] DCS
>Date: Mon, 20 Oct 2003 19:50:09 EDT
>
> >>>
>One more question. On many of the federal P-25 freqs there is an open
>carrier, and on stronger freqs I can hear a tone. It's not on ALL the
>freqs, but it is on quite a few. The tone does not hit on any CTCSS tones.
>What is this? (it sure makes the new freqs easy to find...)  Ruff
><<<
>
>->>>>Ruff, I have seen you post this before, but I have no idea what you 
>are
>hearing. I have never run in to open carriers or tones on any of the
>digital federal channels I've monitored.---<<<<
>
>**Ruff, could you be describing what your hearing with a NON (P25) digital
>capable scanner.  Then you would hear tone or buzzing noises and the PL 
>tones
>would not match up correctly???
>
>
>--- StripMime Report -- processed MIME parts ---
>multipart/alternative
>   text/plain (text body -- kept)
>   text/html
>The reason this message is shown is because the post was in HTML
>or had an attachment.  Attachments are not allowed.  To learn how
>to post in Plain-Text go to: http://www.expita.com/nomime.html  ---
>_______________________________________________
>FedCom mailing list
>[email protected]
>http://mailman.qth.net/mailman/listinfo/fedcom

          No. I'm hearing the carriers & tones on a digital P-25 scanner.  
On most of the frequencies farther away it just sounds like a carrier. But 
on certain freqs that have a stronger signal I can hear a tone, which sounds 
like the same tone. I get the carrier on freqs I know to be active, and when 
I put in ones I didn't know about I find new active channels. But it's not 
ALL freqs in use, it seems to be about 75% though. A good example for 
someone in North San Diego or Orange County is 165.875 (carrier, used to be 
BP ASU channel, and 165.8875, which has a strong tone, and is a Wide Area 
Net repeater. A friend that is a radio tech said something to the effect of 
it having something to do with the receivers differenciating between analog 
and digital signals. (way out of my limited knowledge), but he seemed to 
know exactly what I was talking about.
Ruff

_________________________________________________________________
Cheer a special someone with a fun Halloween eCard from American Greetings! 
Go to  http://www.msn.americangreetings.com/index_msn.pd?source=msne134