[TrunkCom] Control Frequency Only Mode

[Jeff Kenyon]

We need LCN's for EDACS and LTR because they are different trunking
formats.  EDACS and LTR radios, by contrast have all the LCNS programmed
in the same order as you would program them into your scanner.





On Wed, 26 Oct 2005, JERRY NONE wrote:

> So then why don't we need the L.C.N.s or Channel
> Numbers for Motorola but we need them for EDACS and
> LTR?
>
> --- bearcat <rwnewbould at comcast.net> wrote:
>
> > 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?
> > > >
> > > >
> > >
> >
> ========================================================================
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> > > >
> > >
> >
> ------------------------------------------------------------------------
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> > >
> >
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> > >
> >
> ------------------------------------------------------------------------
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> > > >
> > >
> >
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