Cessna 1980 172RG Cutlass Pilot Operating Handbook page 149

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CESSNA 400 TRANSPONDER
AND ALTITUDE ENCODER (BLIND)
FUNCTION SWITCH - Controls application of power and selects transponder
operating mode as follows:
OFF - Turns set off.
SBY - Turns set on for equipment warm-up or standby power.
ON - Turns set on and enables transponder to transmit Mode A (aircraft
identification) reply pulses.
ALT - Turns set on and enables transponder to transmit either Mode A (aircraft
identification) reply pulses or Mode C (altitude reporting) pulses
selected automatically by the interrogating signal.
REPLY LAMP - Lamp flashes to indicate transmission of reply pulses; glows
steadily to indicate transmission of IDENT pulse or satisfactory self-test opera-
tion. (Reply lamp will also glow steadily during initial warm-up period.)
Figure 1. Cessna 400 Transponder and Altitude Encoder (Blind)
(Sheet 1 of 2)
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PILOT'S OPERATING HANDBOOK
SUPPLEMENT
1 July 1979
PILOT'S OPERATING HANDBOOK
SUPPLEMENT
IDENT (ID) SWITCH - When depressed, selects special pulse identifier to be
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transmitted with transponder reply to effect immediate identification of aircraft
on ground controller's display. (Reply lamp will glow steadily during duration of
IDENT pulse transmission.)
DIMMER (DIM) CONTROL - Allows pilot to control brilliance of reply lamp.
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SELF-TEST (TEST) SWITCH - When depressed, causes transponder to generate a
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self-interrogating signal to provide a check of transponder operation. (Reply
lamp will glow steadily to verify self-test operation.)
6. REPLY-CODE SELECTOR SWITCHES (4) - Select assigned Mode A reply code.
7. REPLY-CODE INDICATORS (4) - Display selected Mode A reply code.
REMOTE-MOUNTED DIGITIZER - Provides an altitude reporting code range of
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- 1000 feet up to the airplane's maximum service ceiling.
Figure 1. Cessna 400 Transponder and Altitude Encoder (Blind)
(Sheet 2 of 2)
1 July 1979
CESSNA 400 TRANSPONDER
AND ALTITUDE ENCODER (BLIND)
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