Connecting a CAT to the Motorola Maxtrac
and Radius line of mobile transceivers.
| Connecting a CAT controller to a Motorola Maxtrac and Radius series transceiver radios can be accomplished by following the interconnections below.
Build a cable with a Male DB25 connector on one end of a 5-wire conductor cable (Plugs into the CAT controller). The other end of the cable will be soldered to the accessory connector that plugs into the Motorola radio. Wire the cable as follows:
2) Since the transmit audio input to the Motorola radio is microphone audio, it's advisable to attenuate the TX audio output of the CAT controller. Some CAT controllers have a 100 ohm resistor from the TX audio output to ground that can be inserted with a jumper plug. If your controller does not have the 100 ohm resistor jumper option, solder a 100 ohm resistor between the TX audio output and ground.
3) The Accessory connector (16 pins) carry the following part numbers: