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Pages: [1] 2 3 ... 10
 on: July 08, 2018, 06:23:24 PM 
Started by redo109 - Last post by emsgeorge
You know this thread was posted in 2015 ?

The OP hasn't been back since August 2015 ..

 on: July 07, 2018, 07:41:56 AM 
Started by redo109 - Last post by nenevall
the only thing i can see is the GP I/O lines aren't disabled and the radio could be trying to use rear connector channel steering, disable them and see how it goes.

 on: July 03, 2018, 10:20:13 AM 
Started by PRO2WAY Radio - Last post by Andreas GH
If it has a 515k FLASHROM inside,it is possible to flash it into a GM340.
Before you do something,read and save the tuning data and write down the temperaturecompansation values.
Always program the new codeplug,before you flash it.


 on: July 02, 2018, 11:35:17 AM 
Started by redo109 - Last post by m3odq
I've programmed many tens of Moto GM series radios, and never had a single issue.
Recently, this happened with a set I bought on "a well known auction website".

The radio has been pressed into service as a single channel RoIP link, so not really a problem as such, but it would be nice to know if this gets resolved, as I couldn't work it out.   Cry

 on: July 02, 2018, 11:32:58 AM 
Started by m3odq - Last post by m3odq
Hi Jon,

Wow, this was a long time ago. The original post was almost a decade ago!
I can't remember what happened with my problem in the end, but I've run a number of GM series radios in the meantime, so I must have sorted it at some point.

As for your problem..
I strongly recommend using line in audio rather than microphone audio. I avoid any amplification if possible to try and keep the noise down.
Try using Pin 5 (Flat TX audio). Input needs to be about 150mV for 60% deviation (from Moto datasheet).

Also, I refuse, point blank, to short ground connections between devices after killing a really nice MP3 player during testing.
After the above happened, I put 1:1 600ohm transformers between everything, and use either opto-isolators or relays for the PTT. This means that the radio has absolutely NO electrical connection to the "other" device (PC etc).
The transformers also alleviate impedance issues.

I'll keep an eye out here, but if problems persist, contact me on any of the details below and I'll have a closer look.

I've been building interfaces for people on an ad-hoc basis for somewhere in the region of 15 years. This has started to wear thin, due to the problems inherent with veroboard designs.
I'm moving to a more reliable design with the build process documented here: https://www.facebook.com/voxlinkroip/
The above is a work in process!!

I can be contacted at admin@digitalradiohacker
Website: www.digitalradiohacker.co.uk
Facebook Page: https://www.facebook.com/DigitalradiohackerUK/

 on: July 02, 2018, 11:18:19 AM 
Started by Hotroder22 - Last post by Hotroder22
hello new to this site I am on a vol. fire dept. and we just got a new Durango to add to fleet and I need to reprogram our radio with our freq. any help would be greatly appreciated

 on: July 02, 2018, 09:24:50 AM 
Started by PRO2WAY Radio - Last post by PRO2WAY Radio
Hi All
I've been working with Motorola equipment for many years.
Now I've been asked a question I'm unsure about.
Can a 4 channel standard CDM750 be flashed to become a GM340 so a standard CPS can be used for programming?

Best Regards

 on: June 19, 2018, 08:25:59 PM 
Started by AndyC - Last post by emsgeorge
B or C revision cable, not A

 on: June 19, 2018, 08:21:27 AM 
Started by AndyC - Last post by AndyC
Quick query about cable compatibility, are DP3xxx cables compatible with the DP4xxx radios? I've some DP4400e units that I need to program, just want to make sure I get the right cable.

 on: June 15, 2018, 02:54:27 PM 
Started by MikJank - Last post by MikJank
Guys you are magnificent.


I did what you suggested. Phase 3 codeplug upgrade, but I needed to leave all check boxes checked by default ("Write hardware codeplug" and "Write application code plug). Installation completed without problems.
Added regional ID, as you suggested
Then I assigned serial number using Professional Tuner. With the same program I checked temperature compensation value.
The only other thing I did was programming frequencies.

It is working like a charm, for now.
I would like to thank you all for your contribution.
It was privilege "working" (by working I mean listening and following) with you. Now I'm richer for one more experience and few more friends.
Thank you!     

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