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CONTROLS COM Power/Volume Knob controls unit power and COM volume. Pressing it momentarily disables automatic squelch control. COM Flip-Flop Key swaps the active and standby COM frequencies. Press and hold it to automatically tune the emergency frequency (121.5). VLOC Volume Knob controls volume for the VOR/Localizer (VLOC). Pressing it momentarily enables or disables the ident tone. VLOC Flip-.op Key swaps the active and standby VLOC frequencies. Large Left Knob (COM/VLOC) tunes megahertz (MHz) values for the standby COM or VLOC frequency. Small Left Knob (COM/VLOC) tunes the kilohertz (kHz) values for the COM or VLOC frequency. Pressing the small knob momentarily also toggles the tuning cursor between the COM and VLOC frequency .elds. CDI Key toggles the navigation source (GPS or VLOC) going to the external CDI or HSI. Range Key selects the map scale. The up arrow zooms out showing a larger area. The down arrow zooms in showing a smaller area. Direct-To Key allows you to enter a destination waypoint and then displays a direct course to it. Clear Key erases information or cancel an entry. Press and hold CLR to display the Default Navigation Page. Enter Key approves an operation or completes data entry. It also con.rms information, like during power on. Large Right Knob (GPS) selects between the displayed page groups: NAV, WPT, AUX or NRST. It also allows you to move the cursor about the page. Small Right Knob (GPS) selects pages within a group listed above. Pressing it momentarily displays the cursor.
USING VLOC VLOC refers to tuning and navigating with VOR and localizer (LOC) signals. All VLOC controls and indicators are located on the left. The active frequencies are on top, standby on the bottom. Position Entry Cursor - If the tuning cursor is not currently in the VLOC window, press the small left knob momentarily. Enter Frequency - The large left knob tunes MHz. Think “big number, big knob”. The small left knob tunes kHz.
Activate Frequency - The VLOC .ip-.op key activates the tuned frequency. The standby frequency becomes active, and the active frequency becomes standby. Adjust Volume - using the VLOC volume knob. Press it momentarily to enable and disable the navigation aids ident tone.
SELECT NAV SOURCE The CDI key toggles between GPS and VLOC outputs for the CDI or HSI. The selected navigation source is displayed just above the CDI key. CAUTION Selecting the wrong CDI source is a common but serious problem.
Compliments of the AOPA Air Safety Foundation
