Hmmm my Motorola Repeater on GM300 and M120 is not working and I can't hear go farther at 20 miles. Something on my repeater system has brought back in 1 mile local repeater. All I knew my repeater should be correct frequency and duplexer. I think I put something wrong programming on Motorola RSS GM300/M120 software on DOS program mode GM300- RX Mode RX: 462.6500 TX:462.6500 or RX: 462.6500 TX: BLANK M120- TX Mode RX: 467.6500 TX:467.6500 or RX: 467.6500 TX: BLANK Can you tell me which is the correct frequency to programming and make long distance? Please let me know. Thanks, Captain Randy