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Table 3 - Function of Controls and Indicators
Refer to
Fig 5
Controls
and Indicators
Description
Function
A
Mode selector
4 position
rotary switch
OFF - power off
SBY - standby mode
ON - Mode A/S selected. Altitude
information suppressed
ALT - Mode A/C/S switched
on. Altitude information
transmitted
B
Rotary switch
Rotary optical
encoder
Rotary switch to change
settings
C
Button
P r e s s / r e l e a s e
action
Press to set digits or to select
menus
D
IDT
Push button
Activates identification code
for 18 seconds
E
Display
2-line LCD
presentation
Top row - squawk code
Bottom row - flight level
F
STO
Push button
Stores selected values
G
SEL
Push button
Opens and selects the menu
H
Display
LCD indicators
Displays additional indicators:
R - Reply
ID - Ident
ALT - XPDR ALT mode
ON - XPDR ON mode
FL - Flight level
J
VFR
Push button
Activates VFR code in the
upper row of the display
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UNCONTROLLED DOCUMENT - NOT FOR USE IN FLIGHT OR TO BE PRINTED