I am trying to connect my DEM 900 MHZ transverter. To my 6500 but had not luck. The transverter is connected to the transverter port on the radio and the PTT line is connected to the PTT on the DEM. I have configured the transverter radio setting for 28.100 IF and 902 output. The dBm I have set for 0.1. The DEM 902 is set for 5 watts in = 7 watt out. I am unable to bring up local 900 MHZ repeaters in the area.