Astro Spectra Windows CPS band limit issue

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Astro Spectra
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Joined: Sat Sep 22, 2001 4:00 pm

Post by Astro Spectra »

Hi All,

For those of you who are using or thinking of using the new CPS with Astro Spectra mobiles programmed with out-of-band frequencies, be aware that you will loose existing out-of-band channels programmed with the DOS version when the code plug is first read in CPS. This applies even when the radio is read with a CPS that has extended band limits.

In other words the frequencies are lost when the code plug is first converted into the CPS format.

However once in the CPS format and the frequencies reprogrammed you are OK from then on. Further reads and writes will not cause the frequencies to be lost.
motsaber99
Posts: 218
Joined: Tue Sep 04, 2001 4:00 pm

Post by motsaber99 »

Then if I start out with a unprogrammed code plug I should be able to program most out of band in to them with CPS software.
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Astro Spectra
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Joined: Sat Sep 22, 2001 4:00 pm

Post by Astro Spectra »

Well I'm not certain what you mean by an 'unprogrammed' code plug - but I'll assume you mean one containing only in-band frequencies.

In this case you will not have any issues going to the band limits of the CPS (see my posting on 09-23) or further if you have extended the band limits using a hex editor.

Note that unlike the old Saber RSS, you can't create a blank Astro code plug (although this would be a great CPS feature!).
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Elroy Jetson
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Joined: Mon Sep 03, 2001 4:00 pm

Post by Elroy Jetson »

Interestingly enough, this oddity you've noted regarding the codeplug's out of band channels being changed by the CPS, even after modifying the CPS, is something that doesn't seem to occur with portable radio codeplugs.
I have had no such issues with Astro Sabers or with XTS-3000's.

I wonder why that is?

Elroy
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Astro Spectra
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Joined: Sat Sep 22, 2001 4:00 pm

Post by Astro Spectra »

Hi Elroy,

Yes very unexpected! At first I thought I must have run the standard version of the CPS exe file.

This hit me on of our special hi-power VHF R2 (well more like R1.5) units that have a bunch of freqs below 144 MHz and just above 160MHz.

Next I went thru the exe file again checking for the 146 MHz hard floor - but no deal on any common format (HC11/Intel/hex/ASCII/etc).

My theory is that is something to do with the way the CPS format is converted from DOS to the new format.

By the way, the new CPS format has a 64 byte header section that starts with the model number and serial number extracted from the radio. I the flashcode is also encoded but I've not found it yet Because I know you'll ask, playing with the S/N and model number does not allow a CP force feed into another radio. Even after re-computing the unique header check sum it doesn't work.

John
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