User Guide

Series III Avionics
Pilot's Guide
Page 31
TST - Test Mode
1. Sends a park-at-90° command to external
indicators.
2. Displays the letter L along with a number in
Standby Frequency window, used for
maintenance purposes.
3. Pressing the WHOLE/HALF KHZ button in this
mode interrupts the park-at-90° command and
provides station relative bearing to external
indicators. Simultaneously, the lower line of the
display will indicate the same relative bearing
digitally to the nearest tenth of a degree.
VOLUME - (inner knob of FUNCTION
SELECTOR). Controls audio level of receiver.
Frequency Knobs
Large (outer) knob tunes the receive frequency
in hundreds of kHz from 1 through 21, skipping
19 and 20.
Small (inner) knob tunes tens and half kHz (see
the WHOLE/HALF KHZ pushbutton switch
description).