[TrunkCom] Control Frequency Only Mode

[JERRY NONE]

Oh great.  Another question, "Why is that?"
Also does Bearcat's explanation explain why you do NOT
need a Offest and Base Frequency on VHF/UHF for EDACS
and LTR?

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

> With Motorola systems the channel assignments apply
> to 800 and 900 MHz,
> and VHF/UHF systems need the tables to be set
> accordingly.
> 
> 
> 
> 
> 
> On Wed, 26 Oct 2005, bearcat wrote:
> 
> > The channel no. on Motorola are calculated in the
> control channel data
> > based on the base freq of the system. I guess the
> best way to explain
> > it.....
> >
> > The Mot system determines the freq based on a base
> freq and the channel
> > no. assigned to the freq.  The freqs are assigned
> a designated ch # like
> > 381 relates to a specific freq.  So the freq and
> Ch # are always the
> > same Ch 381 in Ohio is ch 381 in California.  It
> is a predetermined
> > system used on all Motorola systems, excluding the
> new P25 systems.
> > Remember P25 is an industry standard it is not
> Motorola
> >
> > The LTR and EDACS control channel data just says
> go to ch 1 or 13 or 9
> > it does not really care what freq would be there
> it just goes to the
> > Logical Channel No. not freq. LCNs # can contain
> any freq that is put
> > there, there is not CH# to Freq relationship  If
> you changed the freq
> > for LCN#1 on an edacs repeater the control channel
> would still go to LCN
> > #1 because it does not handle any freq data.  LTR
> do not have a single
> > control channel, they have the LCN data on all
> freqs in the system, but
> > once again they are not related at all to freq.
> >
> > The new EFJohnson IP25 system is a mix it uses a
> single control channel
> > but directs units to a freq through ch. No. which
> are defined Just for
> > that system
> >
> > Example
> > System A          System B
> > CH1 856.2125	CH1 856.4125
> > CH2 857.2125	CH2 857.4125
> >
> > This is why you can have Control Channel only
> programming on your
> > scanner for Motorola and not LTR or EDACS.
> >
> > You get the idea
> >
> > Hopefully someone with a better techical knowledge
> of the system will
> > respond.  The concept of the email is correct I
> just do not maybe know
> > all of the tech jargon
> >
> > Rich
> >
> >
> >
> > 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?
> >
> >
> >
> > _______________________________________________
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> > mailto:TrunkCom at mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/trunkcom
> >
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> > http://mailman.qth.net/subscribers.htm
> >
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> 
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> 


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