[TrunkCom] Control Frequency Only Mode

[bearcat]

Each 800/900 mhz freq has been aasigned a channel no.  The control
channel data from the system tells the units which channel no. (hence
freq) to go to.  The scanner gets the information from the system
control channel so they can add as many new sites as they need and the
data will then be on the system control channel so the scanner handles
if just fine.  This is why rebanding is such and issue the channel no.s
being sent will make no sense to the scanner.  The advantage to using CC
only programming is that if something would change on the system the
scanner user will never miss a beat.  If you have all of the freqs
programmed in a a new site is added you will not hear it.

This is explained to the best of my limited tech knowledge

Rich

-----Original Message-----
From: trunkcom-bounces at mailman.qth.net
[mailto:trunkcom-bounces at mailman.qth.net] On Behalf Of JERRY NONE
Sent: Monday, October 24, 2005 10:58 AM
To: Discussion of Monitoring Trunk Radio Systems
Subject: Re: [TrunkCom] Control Frequency Only Mode


Does anybody have a copy of this band plan?

--- Jeff Kenyon <at649 at tcnet.org> wrote:

> Hi Jerry, a scanner that doesn't support control
> only mode will have the
> frequencies as reference to go to for a
> transmission.  In control channel
> only mode, the scanner follows the specific band
> plan that Motorola has
> set up for its various bands such as 800 and 900 MHz
> trunking so that is
> how this is all possible, and with control only mode
> you can hear all the
> transmission, and any subsequent transmission.
> 
> 
> 
> 
> 
> On Mon, 24 Oct 2005, JERRY NONE wrote:
> 
> > Question.  Okay, say for instance you have a radio
> > scanner that does NOT do Control Frequency Only
> Mode.
> > So you program in all the frequencies.  So when
> the
> > Controller tells Talk group 336 to go to a
> frequency
> > of 868.7125, how does a radio scanner in Control
> > Frequency Only Mode know NOT to go that frequency.
> > Instead the message is heard on one of the Control Frequencies.  
> > Also by being in Control Only Mode,
> does
> > this prevent the radio scanner from hearing all
> the
> > transmissions?  I mean if the system you are
> > monitoring has seven frequencies and then adds
> three
> > more frequencies to accomodate extra users but the
> > Control Frequencies remain @ the same amount,
> won't
> > that cut off some transmissions?  What happens
> then,
> > do you just hear the priority transmisions?
> >
> >
>
========================================================================
> > County Of Medina Ohio County Scanner Group: 
> > http://groups.yahoo.com/group/medinascanner/
> >
>
------------------------------------------------------------------------
> > Southwest_Parma_Strongsville Scanner Group:
> >
>
http://groups.yahoo.com/group/Southwest_Parma_Strongsville/
> >
>
------------------------------------------------------------------------
> > There will be a new radio scanner on the market
> soon.  Here is the Yahoo Group for that Radio
> Scanner:  http://groups.yahoo.com/group/BCD996T/
> >
>
========================================================================
> >
> >
> >
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========================================================================
Southwestern Cuyahoga County Ohio, Parma Ohio & Strongsville Ohio Radio
Scanner Group:
http://groups.yahoo.com/group/Southwest_Parma_Strongsville/
------------------------------------------------------------------------
County Of Medina Ohio County Scanner Group:  
http://groups.yahoo.com/group/medinascanner/
========================================================================


		
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