The P50 is not a synthesized radio and therefore is not programmable. Use these charts to set the PL or DPL frequency.
The P50+ programmer should be the same pinout as the P100. Just put the data line to the contact on the PL/DTMF board and the ground to the -battery clip. This is only a programming interface to the accessory board and programs PL,DPL,DTMF info. No channels can be changed as it is not synthesized either.
Another note on the P50+ is that "full-line" Motorola dealers sold a version known as the HT-10 which uses the same programming adapter but uses its own unique software and has a tan case.
