CDM1250 - is GM300 RIB to Radio cable correct?

[g8tzl2004]

I have previously programmed a CDM1250/GM360 using a homebrew Maxtrac / GM300 RIB to radio cable.

This worked OK EXCEPT when I upload to the radio, the process completed with the radio POWERING DOWN and not up again. I had to manually switch the radio back on. All CPS adjustments worked OK but the powering down at the end is a bit worrying!!!!!

Is this normal?

The Maxtrac/GM300 lead is identical to the Batlabs CDM1250 lead EXCEPT that there is no BOOT connection (RIB pin 25 to RJ45 pin 6). However, I understand that the BOOT connection is just for flashing new firmware and is not used with basic programming.

Do I need to actually have the BOOT connection to stop the CDM1250 powering down after uploading?

I have also read that the CDM1250 uses the GM350 lead which is a lot different from the Maxtrac/GM300 lead and includes a 1K resister across RIB pins 12 and 16 , RIB pins 4 and 13 are linked and RIB pin 16 is connected to RJ45 pin 3 as well as the GND and BUS+ connections.

What is the correct lead to use to prog a CDM1250?

Thanks

[wavetar]

The Maxtrac/GM300 wiring is correct for the CDM series. As far as the powering off issue, are you by chance using a Dell? I recall a similar issue being detailed in the readme files at one point. What is your CPS version, OS version, and what is the radio firmware version?

[g8tzl2004]

I was using an IBM T20 Thinkpad running XP.

I acquired the radio in July 2009 which was a GM360, the European version of the CDM1250/CDM1550. I was using CPS R03.09.03 and firmware R03.11.02

Do you think there is a difference between the US CDM1250/CDM1550 and Euro GM360 which requires a different RIB to Radio cable?? I know the USA 800/900MHz LCS2000 uses a different RIB to Radio cable than the Euro UHF LCS2000, even though it looks identical.

Any idea if the official Moto RIB to radio lead for a GM360 is identical to the CDM1250/CDM1550?

[g8tzl2004]

UPDATE: Using the Maxtrac/GM300 RIB to radio cable worked 100% OK with my VHF CDM1550/GM360..the radio did NOT power down after completing the upload process...unlike my UHF CDM1550.

Both the VHF and UHF radios were using the same firmware...although I used a later CPS version with the VHF radio and used an IBM Thinkpad X60 laptop running XP instead of the Thinkpad T20.