: Press the Channel Selector knob (or use the Microphone Up/Down keys) to change the numerical value of the selected parameter.

Requires an RF signal generator hooked to the antenna jack. Inject an exact -73dBm (50 microvolts) signal into the radio and adjust this menu value until the on-screen S-meter rests perfectly on S9 .

Before changing a single number in the service menu, scroll through every parameter and write down the factory default value. Every individual radio leaves the factory with unique tuning values burned into its EEPROM. There is no standard "universal reset" value.

A: If the VCO unlocks, you will hear clicking. Turn the radio off. Open the case and look for the two VCO trimmer caps (TC1/TC2). If you didn't touch those, re-enter the service menu blindly (you may need a strong signal in the room to hear beeps) and set P-01 back to 2.5.

Adjusts the 10.24MHz Beat Frequency Oscillator and Local Oscillator offsets to center RX/TX. Navigation and Controls

The entry sequence for the updated Version 2 (N II) is more complex than the original model. : Start with the radio turned OFF .