Using the Ten-Tec 302R Remote Encoder with the Omni 6

If you're willing to wire an adapter cable, you can use the Ten-Tec 302R Remote Encoder with the Omni 6. Here is the wiring info, that includes connection for the CAT port:

Signal 302R DIN8 Omni6 DB25 PC COM port DB9
*Encoder A pin 1 pin 8
*Encoder B pin 6 pin 6
Ground pin 2 pin 1, 7 or 14 pin 7
+5V pin 8 pin 16
TX Data pin 2 pin 3
RX Data pin 3 pin 2

*In addition, 10K ohm pull-up resistors need to be added between each Encoder line and +5V

If the encoder tunes backwards, swap wires on DIN8-1 and DIN8-6