On the VXR-7000, the RJ45 pins 1 and 2 are the collector and emitter respectively of an optoisolator that changes state when the squelch is broken and the correct pl/dpl is used. www.jammerdave.com/vertex.html says to connect the pin 1 to the pl detect of the repeater controller and pin 2 to ground. He also says it is basically an open collector circuit.
I tried step 1 and no luck. I then connected a 33k pullup resistor between 12v and pin 1. I took pin 2 to ground. I keyed the HT on the correct freq and pl and lo and behold, pin 1 dropped to ~1.3 volts. Problem is, my controller needs to see more like 0 volts. I looked in the service manual and it looks like there is a zener keeping pin 1 at 1.3 volts or higher. Any ideas???? - Jerry K8CMI
