[Motorola] Band Mod for CDM-1550s?

[Dick]

I think Moto will provide other freq limits if the customer asks for it. 
Consider the military's use of the 30-88 MHz band for their tactical FM 
radios.  I believe they can also buy current Moto radios that include that 
range.  Might be worth checking on.  Of course, they might hit the non-mil 
buyer with some sort of "special engineering" fee.

Dick

----- Original Message ----- 
From: "Eric Lemmon" <wb6fly at arrl.net>
To: <motorola at mailman.qth.net>; <jcoote at ci.arcadia.ca.us>
Sent: 17 May, 2005 19:37
Subject: Re: [Motorola] Band Mod for CDM-1550s?


> Jay,
>
> Strange coincidence- I was on the phone to the Motorola Software and 
> Design
> groups this morning, asking pretty much the same thing.  My specific
> question was, "How can I make the low-band CDM radio operate in the 50-54
> MHz segment?"  The answer, predictably, was that it can't be done.
>
> I am inclined to believe them, simply because a Motorola engineer 
> explained
> to me more than a year ago, how the CPS+ software interacts with the
> connected radio's firmware and masked memory to fix the permissible
> frequency ranges.  The CPS+ is vastly different from the old DOS RSS, 
> where
> you could tweak the *.mdf file with Hex Workshop to make a radio think it
> had a different bandsplit.  With CPS+, the radio tells the software what 
> its
> bandsplit is, not the other way around.  Since the masking is permanent 
> and
> not alterable like firmware, it can't be changed with software commands.
>
> Unfortunately, I don't see Motorola changing the design of a flagship 
> radio
> line merely to accommodate a bunch of 6m operators.  That's a shame... it
> would be great to use on 6m.
>
> 73, Eric Lemmon WB6FLY
>
> "Coote, Jay" wrote:
>
>> The lowband CDM-1550s appear to be pretty narrow, considering the old
>> Syntor X9000 lowband could be made to cover 29-54 MHz out of one radio- 
>> to
>> do that with CDM-1550s looks like you'd need three radios. Are there ways
>> to stretch the bands in the CDM-1550s?
>
>
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