You should now see +12 volts on Pin 8 with the receiver squelched. Reconnect the positive voltmeter probe to Pin 8. Repeat the measurement from step 2, but this time, use a pull-up resistor to +12v (wrap one end of a 10k resistor around the positive voltmeter probe and connect the other end of the resistor to +12v). Do you see approximately +5 volts on Pin 8 with the receiver squelched, and less than 0.1 volts when receiving a signal with the correct PL? If yes, this radio can be used with the RA-2. Check Pin 8 with a dc voltmeter (positive probe to Pin 8, negative probe to ground). On some 16-pin models, Pin 8 provides an active-low COS output, even though the accessory connector is not fully programmable. I have read my radio with RSS, but I do not see any option for changing the accessory connector (F9 does not appear on the Radio Wide Configuration screen). If no, change Pin 8 to these parameters and write the change back to the radio.
If yes, this radio can be used with the RA-2. Check to see if Pin 8 is already set as: (Description = PL/DPL & CSQ Detect Data Direction = Output Debounce = No Active Level = Low). This takes you to the Accessory Connector Configuration screen, where the definitions of pins 4,6,8,9,12 & 14 can be viewed or changed.
Here, (if the radio has an expanded logic board), you will find a choice of F9. Go to the Radio Wide Configuration screen (F2). We have one for my work and they are turned down to 15W and then bumped up to a full 30W with the antenna to avoid burning out the finals in the rigs.ġ. I dont recommend running the GM300 full out on TX either as they are not designed to be a full duty repeater.
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