Changing the number of channels in a 1250

PhillyPhoto · Post by **PhillyPhoto** » Tue Nov 02, 2004 10:08 pm

Everything is fine with the radio, I just want to change the radio from having 16 channels to 128. Does anyone know how to do this with just one radio?

-Luie-

Fuel4300 · Post by **Fuel4300** » Tue Nov 02, 2004 10:16 pm

The radio is already capable of 128 conventional channels in 8 zones of 16. These channels have to be programmed via CPS. You have the option of channging channels via the rotary knob and the zones via the keypad, or visa verse.

Mike

PhillyPhoto · Post by **PhillyPhoto** » Tue Nov 02, 2004 10:20 pm

I thought it was capable of 128 channels, but in the CPS it stopped taking new conventional personalities at 18 fo rsome reason, and the e-mail I got from motorola said this "Model number AAH25SDH9DP5AN is a HT1250LS+, 450-512mhz, 1-4Watt, 16CH Radio." It already has 3 zones in it now.

Fuel4300 · Post by **Fuel4300** » Tue Nov 02, 2004 10:25 pm

Oh.......... its an LS+

That model is only capable of a limited number of conventional personalities, 16 or 18 sounds about right. The rest have to be trunking personalities. I believe a flash upgrade might be the only way to rectify that.

If I were you I would either sell it or offer it up for trade for a plain HT1250 especially if you dont have a use for the trunking personalities.

Mike

PhillyPhoto · Post by **PhillyPhoto** » Tue Nov 02, 2004 10:27 pm

Where would I find a flash upgrade?

Fuel4300 · Post by **Fuel4300** » Tue Nov 02, 2004 10:31 pm

You would have to bring it to your local Motorola shop or depot. The upgrades are very costly when compared with what the radio is worth. I dont know exactly but I believe it would probably be in the neigborhood of $250~$300.

I would trade or sell it but it cant hurt to give them a call and ask about it. It might be cheaper but I highly doubt it.

Mike

PhillyPhoto · Post by **PhillyPhoto** » Tue Nov 02, 2004 10:33 pm

alright, thanks for your help

thebigphish · Post by **thebigphish** » Tue Nov 02, 2004 11:22 pm

lets put some accuracy into this thread. look at the model numbers

the last 3 on a model THAT IS LIMITED TO 16 channels are "...5AN"

the last 3 on models that are capable of 128 chan are "...6AN"

your model is only capable of 16 conventional personalities. for instance. i have a ht1250ls+ that has "...6AN" , thus capaable of 128 conventional channels.

Fuel4300 · Post by **Fuel4300** » Wed Nov 03, 2004 12:15 am

Sorry... that is about as good as you can get out of me doing work at 3am...

Here is a more precise breakdown as far as I know. Please feel free to correct me if I am wrong.

HT1250
Conventional only - 128 modes

HT1250LS
Conventional - 16 modes
LTR - 128 talkgroups
*Also should be noted that it is not capable of signalling in conventional modes

HT1250LS+
... 5AN
Conventional -16 modes
LTR and Passport- 128 talkgroups

... 6AN
Conventional -128 modes
LTR and Passport- 128 talkgroups

I have read somewhere on the board that the HT1250LS+ is capable of 160 modes. I dont own one so I dont know for sure.

Furthermore, the HT1250LS can be programmed with 18 conventional personalities if there are no trunking personalities programmed instead of 16. This is because of the available memory.

Mike

PhillyPhoto · Post by **PhillyPhoto** » Wed Nov 03, 2004 7:20 am

OK, that makes sense why Im getting 18 channels. Do you know if there's anyway to force a 6AN codeplug into the radio at all?

Post by **wavetar** » Wed Nov 03, 2004 9:33 am

LuiePL wrote:OK, that makes sense why Im getting 18 channels. Do you know if there's anyway to force a 6AN codeplug into the radio at all?

Well, there's a method outlined in the model specific section on Batlabs which details a possibility. It involves using two ribless cables, a home-brewed Y-cable, and firmware update software.

Be advised that although this method has reportedly been successful in accomplishing certain things (changing a 403-470 unit to a 450-520 unit, for instance), it has NOT been shown to change a "5AN" model to a "6AN" model.

In fact, at least one member reported trying the above with a "5AN" CDM1250LS+. The upgrade at first appeared to take, as the radio now reported itself to the CPS as a "6AN" model. However, it would still only allow 16/18 conventional channels, and no conventional signalling.

Based on that, it would appear the HT1250LS+ would suffer the same fate, although I cannot say for certain. There is no other method to try, to my knowledge.

Todd

PhillyPhoto · Post by **PhillyPhoto** » Wed Nov 03, 2004 11:34 am

I've read that section descring the Y-Cable. Is there anyway of editing the code plug in a hex editor at all?

Post by **wavetar** » Wed Nov 03, 2004 2:25 pm

LuiePL wrote:I've read that section descring the Y-Cable. Is there anyway of editing the code plug in a hex editor at all?

The codeplug is encrypted when saved by the CPS, so you won't be able to do anything to it unless you can develop a program which can read the radio directly. Even then, you'll likely be banging your head against a wall. One member here with such a program was successful in forcing a 16 channel codeplug into a 4 channel radio, but the radio just gave an error tone upon power-up. It's thought there is perhaps a Read Only Memory section of the radio which isn't touched by codeplug read/writes or firmware updates which contains information such as number of channels, model type, etc.

To date nobody on the board has even been successful in expanding the bandsplits of the Waris series, let alone what you want to do. Good luck,

Todd

lovemoto · Post by **lovemoto** » Mon Nov 08, 2004 7:17 pm

Hi, I think HT1250 is quite similar to GP328 or GP338.
We have successfully converted 403-470MHz version to 450-527MHz version, in terms of the software. However, you need a lot of tunings after the conversion. You can only push the frequency out by 10 to 20 MHz.
For example,
A 403-470MHz after conversion to 450-527MHz can only work up to about 480MHz. Any further the radio will transmit with very low power. I think it's due to the front-end filter.
Also, we are able to change a 4Ch to 16Ch and vice versa.
One problem now is the copyright problem.

Victor Xray · Post by **Victor Xray** » Tue Nov 09, 2004 6:00 am

lovemoto wrote:We have successfully converted 403-470MHz version to 450-527MHz version, in terms of the software.

Please explain further. HOW and WHERE in the software?

lovemoto · Post by **lovemoto** » Tue Nov 09, 2004 5:22 pm

We have done a lot of experiment on the GP328 radio. I have to stress that we are only doing it for amatuer experiment and NOT for commercial purposes.
What I meant by "in terms of the software" was the "software" in the radio. The GP328 has 3 parts of data in the memory, we call them:
1. Radio only memory: Only read by radio which is responsible for normal functions. Cannot be changed.
2. CPS memory (read only): Read by the radio and the CPS, but cannot be changed using the CPS. Responsible for the number of channels, band limit, serial number, etc.
3. CPS memory (read/write): Read by the radio and the CPS, can be easily modified by the CPS. Responsible for the frequency, softpots, ID and etc.
I have read a lot about this topic and most people are looking at the CPS. CPS can only change the 3rd part of the memory. Therefore, even if you "force" the data into the radio, the 2nd and the 3rd parts will be mismatch and give you the error message. So it is quite different from GP300.
I could not tell you HOW to modify the 2nd part of the memory because I think Motorola will not allow us to do that. But it can be done.

Victor Xray · Post by **Victor Xray** » Tue Nov 09, 2004 7:10 pm

Really? Well how do you think they feel about the ENTIRE BATLABS.COM site? Don't you think it has the exact same kind of codeplug/RSS/software modification information for other radios models? How about the entire AS/XTS modification information found throughout these forums?

I'm sure you can post more information than just the above. To me, your post is just another "ha ha I know something you don't".

lovemoto · Post by **lovemoto** » Wed Nov 10, 2004 1:33 am

Please do not think that way. We are only "playing" with GP328 and GP338, and no other radios.
I would like to comment that the method is not very appropriate as the sensitivity of the radio will not be as good as before the conversion.

Victor Xray · Post by **Victor Xray** » Wed Nov 10, 2004 6:07 am

Zzzzzzzzzz

MotoTech · Post by **MotoTech** » Wed Nov 10, 2004 9:08 am

The Ht1250LS+ can do Mdc1200 encode/decode in conventional mode!

someone in the post said it was unable to do signalling in conventional mode, but it can. the Ht1250 ls is signalling in trunking mode only.

Andreas · Post by **Andreas** » Fri Nov 12, 2004 1:50 am

The best way,to convert the radio, is to read and save the tuning data,get a codeplug in S-record format that match for a 128 channel radio and
program it with Lab Flashgrade into the radio.
But the problem is to get the codeplug.
I found out,that the codeplugs/firmware/bootloaderfiles from the
upgradetool for HT1250 are in S-record format,but encrypted.

I think there is a way to get it,but I don´t have a change to test it,because I don´t have such radio.
Run Winhex,start the upgradetool with a radio,open the RAM editor (Winhex)and look in the primary memory for the S-records,after you had start the upgrade procedure.
In this way it was possible to me to decrypt the patcher.dat file of the upgradetool.

Andreas