[Scan-DC] Rebanding Montgomery County

[Eric C. Carlson]

It may seem silly on the surface but you have to understand how the
Motorola trunked system protocol communicates to radios to tell them
what frequency to use for a given conversation.  It is LCN based under
the covers (like an EDACS or LTR system) but it uses a fixed channel
plan for an entire band (versus ad hoc for EDACS or LTR).  Motorola
made an assumption about how channels are laid out in the 800 MHz
band.  Rebanding changes that layout.

-Eric

On Wed, Jan 25, 2012 at 3:34 PM, Jeff Krauss <jeff at krauss.ws> wrote:
> Why does a scanner have a problem finding a frequency with a 0 in the
> 4th place after the decimal point?
>
>>------------------------------
>>
>>Message: 4
>>Date: Wed, 25 Jan 2012 12:48:43 -0500
>>From: Dave <afdltret at comcast.net>
>>Subject: Re: [Scan-DC] Rebanding Montgomery County
>>To: scan-dc at mailman.qth.net
>>Message-ID: <4F20407B.9080701 at comcast.net>
>>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>>   Well it is true that all frequencies will come down 15Mhz, as an
>>earlier poster explained even if they don't change the present control
>>channels, the other frequencies that have an 0 in the 4th place after
>>the decimal point will require you to use the rebanding tables to hear
>>all transmissions. Without the tables the Control Channel might look for
>>one of those frequencies but the scanner itself will not be able to find
>>them.
>>
>>Dave M.
>>
>>
>
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