- #Motorola radius m120 programming cable manual
- #Motorola radius m120 programming cable mods
- #Motorola radius m120 programming cable series
Look starting at about offset 0x2AC, you should see something like: In the GM300.MDF file make a Checksum-16 of the whole file (the F12 option in Hex Workshop), in our case we ended up with 0x5D53 (RSS V 05.00), write this down, you might need it later. There is another method of programming the radio out of band, it is a little more complicated than the method described above, but it will work just fine. If you are in need of the programming cable, look here. You entered will appear in regular decimal like any other frequency. When you are done, hit enter like normal, and the frequency.You MUST fill the entire field -use zeros (while.You MUST release the shift key when you enter the.Hold the shift key down while entering the frequency.To program frequencies outside of the rated bandsplit in the GM300 can be very simple, follow the listed steps:
#Motorola radius m120 programming cable mods
You might also want run the RX and TX pins to the unused pins on the front mic connector after the mods are done. It would be wise to do some measurements to make sure you have the deviation correct. You might want to put a pot on your TX line somewhat like the setup Motorola uses (voltage divider) to adjust the deviation. For RX, its no big deal, just take RX audio from PIN 11 of the Accessory Connector and swing JU551 to the (A) position (Flat RX Unmuted).įor TX audio, you will have to run a jumper to the junction of R223, C228, R222 on the RF board to inject the data (if applicable you may need to set the deviation pot in the radio to maximum). They do need a minor modification though.
#Motorola radius m120 programming cable series
The GM300 Series are 9600 baud packet capable. So, save the image and print it using a graphics program. Note: If you try and print this schematic with your brower, it probably won't work.
#Motorola radius m120 programming cable manual
Order the service manual part number 6880901Z79 from Motorola. (Repeater Interface Controller Kit) to get you started. Need to connect a couple of GM300 radios together? Here is a schematic of the R.I.C.K. If you need a repeater interface cable to connect a couple of GM300, M120, or M10 radios together, look here. Linking Radios for Repeater/Crossband Operation You can also check the RIB page for some additional circuits. Just connect the BUS+ and GND wires from the circuit to the appropriate pins on the microphone connector as shown in the programming cable schematic. If you want to build a nice little programmer for the GM300/M120 radios, one that does not require a RIB, check out this link. you can follow this procedure to do the conversion.
If you happen to mess up the codeplug in your radio, and for some reason consider it necessary to make it into a Maxtrac. You may find that the radio already has user-selectable scan, enabled off the front panel.
mdf file, and the RSS just crashes when you try to load a codeplug. Good luck in adding scan to a GM300 8 Channel radio, tried it by editing the. But how, you ask, since it only has a 2 digit display? It encodes (in HEX) the first two numbers of the PTT ID. This radio can decode and display up to 126 PTT IDs. Here is the pinout of the microphone connector.Īre you having problems getting your radio to power up? Well, check here for some information that might help. One thing to note, the HLN9242A kit also includes a pin extractor for removing previously installed pins. These include an accessory connector housing, some pins, and some wires with pins already attached. If you want an easy way to connect to the Accessory Connector on these radios, you can order the HLN9242A or HLN9457A Accessory Connector kits. Look here for the pinout of the accessory connector for the 8 channel radio (which use a masked logic board) or 16 channel radio (which use an expanded logic board). The M120 is just the limited version, not unlike the Maxtrac 50 compared with the Maxtrac 300. The GM300 and the M120 are the same series of radio.
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