A V I O N I C S L I M I T E D
INS 422 Installation/Owners Manual
Original Issue – June 2001
VPN 701034
16
Section
III
OPERATION
Paragraph
3.1 POWER ON UNIT
It is recommended that power to the
INS 422
be turned on only after engine
start-up. This procedure increases the reliability of the solid-state circuitry.
The ON-VOL/MKR-MUTE/BRG control on the lower left side of the display is
used to power up the
INS 422
system by rotating the knob slightly
clockwise out of the off “detent” position. Continue to turn clockwise and
adjust for a comfortable receive audio level for monitoring during the selected
approach.
3.2 CONTROLS
Controls and accessories of the front panel are: (Refer to Figure 1.2, Page
21).
1. On-Volume/Marker
Mute/Bearing
2. Auto
Dimmer
Photocell
3.
Frequency and VOR Bearing Display Window
4.
108 to 117 MHz Frequency Select Toggle (S1101)
5.
0.1 to 0.95 MHz Frequency Select Toggle (S1102)
6.
VOR/Localizer Horizontal Light Bar Assembly
7.
Glideslope Vertical Light Bar Assembly
