When attaching 2 radios to the UDRC™ II it requires two separate custom cables. In this configuration we are always taking audio from Pin 1 of the mini DIN-6 cable. There is some debate on setting the radios in 1200 vs. 9600 baud for transmit using Pin 4 when operating at AFSK 1200, choose what works best in your environment.
See a discussion about pre-emphasis.
The first is a modified Mini DIN-6 M/M cable with only pins 1-4 connected. It's important to have pin 5 disconnected or removed if you have something connected to the HD-15 connector.
|PTT GPIO 23|
The second cable will terminate between the mini DIN-6 and the HD-15 connector.
|DIN-6 Pin||Function||Function||HD-15 Pin|
|2||GND||GND||10 or 5|
|PTT GPIO 12|
Model C201 (mDIN6 to mDIN6) - Port 1
Model C202 (mDIN6 to HD15) - Port 0
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