Home » Support » Software Downloads » Flash & Software Update Files » Satellite Modems » CDM-750 Software Downloads. CDM-750 Software Downloads. Version: Date: Files: F0000305Y_V166: EXE ZIP: F0000305W_V165. CDM1250 Mobile Two-Way Radio Features Due to the FCC Narrowbanding mandate in the United States, product specifications and brochures for Motorola Solutions two-way radio products may indicate 25 kHz/12.5 kHz analog/digital operation which may not be the standard mode of operation at the time of shipment after Jan.

Contents • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Waris This was originally put together when I got into the HT1250 200 MHz radios. They modified ok, but the way of doing it as suggested left much to be desired, and the DTMF pad didn't work and the radios were narrow band only. Over time, I've gotten more into these with the CDM1250/1550 and other waris series radios.

I've not seen any of the European ones, but I've been working with the US versions for FM service in ham radio. What I've found is the radios features are determined by the 'codeplug' settings. This is simply a packed (hex) data written into the eeprom chip of the radio containing tuning, feature and programing data. This is the same area the programing data from CPS is written in, but CPS is unable to change it.

The majority of modification of these radios to amateur service is done with modifications to the codeplug. The codeplug layout appears to be the same for most US versions of the radios, but there are some which are different. Flash adapter for CDM1250 radio 220 HT1250ls and CDM 1550ls This is the same as any other to modify to the amateur service from a software perspective. The issue is these radios are narrow band only on the receive path, as the 200 MHz band was never used for 25 KHz channels. Transmit will support wide band (and must be aligned for wide band first!) The IF filters simply need to be swapped with their wide band parts and wide band receive alignment performed.

Hardware Mod Their are 3 filters in the radio, 1 at 44.85 MHz 1st IF and 2 at 455khz, 2nd IF. In a VHF/UHF Waris there is a 15KHz filter at the 1st IF followed by a 15KHz filter at the second IF and then followed by another filter. It's this last filter that is switched between narrow and wide in the VHF/UHF radios. Windows installer kb893803 v2 x64 x86 free.

TX deviation is a setting in programming/alignment. In the 220 version, there 1st IF Filter is the same, but it has a 12KHz and then a 9 KHz filter at the second IF.

I've changed out the second filters and found it works much better on the ham bands. You need to adjust the squelch for 20/25khz channels after doing this. The tuner software (2.00.02) will do this for the HT1250 only, it will not work with the mobiles.

Use to access the greyed out menus in tuner 2.16. HT1250 Filters: Function Part Manu P/N Moto P/N Desc 220 front end 44.85MHz FL3201 MXFM10 4-pole +-7.5khz bandwidth IF2 First filter 455KHz FL3204 CFUCJ455F 9180468V04 4-pole 12khz IF2 filter narrow band filter FL3206 CFWC455G 9180469V03 6-pole 9khz The UHF handhelds use the same arrangement, but with a wider middle filter (1st @455).

In wide band they switch only the 2nd 2nd IF filter to a narrow band filter. Uhf front end 44.85MHz FL301 MXFM11 IF2 First filter 455KHz FL302 CFUCJ455E 9180468V05 4-pole * IF2 filter wide band filter FL303 CFWC455E 9180469V05 6-pole * IF2 filter narrow band filter FL304 CFWC455G 9180469V03 6-pole You'll need to order the parts with the * from motorola parts for the 220 radios. The mobile and HT use the same filters. In the HT the 1st IF is under the shield, and very hard to remove. I've not messed with it, as it appears to be the same part in the UHF, and doesn't look like it's limiting. Based on the following codes for muratta filters Muratta filters E is +- 7.5 (15) F is +-6 (12) G is +- 4.5 (9) The 220 Filters are 12 and 9 Khz wide at the 2nd IF. Switching them to the E filters of the UHF HT1250 is rather easy, as they are just on the underside of the board, not under a shield.

An under board heater with a hot air station makes this rather easy. Ive found an under-board board pre-heater is mandatory to work with this and 630f at 7 l/m of airflow will prevent hurting the board/parts/ I've found the sensitivity to be a bit better and no squelch clipping on 3.2kc tone at 7khz of deviation (Most ham rigs on 220 have WIDE deviation!). Software mod All this below is not needed. Check out using the for using waris.py and chirp. Using Chirp is the way to do it and you can change everything. I typically set the signaling bits to FF enabling all signaling supported, but some radios may not work with this. Always read the radio and save the data before making changes.

The data file format is the same binary on the radio EEPROM and use by cptool. Old way This is easiest with CP tool and a hex editor. First upgrade the Firmware using the firmware update. This will load the default codeplug back in the radio. Read the radio using the CP tool and save the binary codeplug. I typically will read this from 0x0000 to 0x1000 which will capture the entire default codeplug (Tuning, Features, and Programing). Save this file and set is aside for safe keeping.

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