32Advanced OperationSystem ModeIntercom LevelThis function adjusts the Intercom Audio Level. Turn the SMAll knob to change thevalue. The range is from 1 to 100. Setting the value to “variable” slaves the intercom level tothe volume control knob.Sidetone LevelThis function displays and adjusts the sidetone audio level that is heard when the trans-mitter is keyed. Turn the SMAll knob to change the value. The range is from 1 to 100. Set-ting the value to “variable” slaves the sidetone level to the volume control knob.Headphone LevelThe Headphone Level function allows you to adjust the headphone audio level. Turn theSMAll knob to change the value. Setting the value to “variable” slaves the headphone audiolevel to the volume control knob. The range is from 1 to 100.VOR Equipment TestThis menu allows you to record information about the most recent equipment checkperformed on the unit as required for IFR flight. You may include information about: Date ofLast Test, Type of VOR Test, Location, Bearing Error, First Name, and Last Name.1. Press SYS to reach System mode and then turn the LARGE knob to the VOR Equipment Test function.Press ENT.2. Turn the LARGE knob to the desired item.3. Press SEL to enable editing. The LARGE knob moves the cursor and the SMALL knob adjusts the valueat the cursor. Press ENT to save the values you selected. Press SEL to abort editing.4. Repeat steps 2 and 3 for all the desired information areas.5. Press COM or NAV to leave the System mode. Press SYS to go back to the main System mode menu.