Honeywell CAS-100 Maintenance Manual page 125

Table 19. CTA-81B Control Unit Controls and Indicators (cont)
Control/Indicator
(See Figure 11)
NORM Position
BELOW Position
ATC IDENT Pushbutton
Switch
Code Select Knobs
ATC IDENT Code Display
ATC FAIL Indicator Lamp
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MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
Selects display of nonthreat aircraft up to +2700 feet above own
aircraft and down to -2700 feet below own aircraft on traffic display.
Selects display of nonthreat aircraft down to -8700 feet below own
aircraft and up to -2700 feet above own aircraft. BELOW is
annunciated on the traffic display screen.
Within 18 seconds after the switch is pushed and released, an SPI
is put into the transponder Mode A and DF-4, DF-5, DF-20 and
DF-21 Mode S replies to the interrogations from ground stations.
The SPI is shown for 18 seconds. If the switch is held pushed
longer than 18 seconds, the SPI bit is transmitted while the switch
is pushed, plus an additional 18 seconds after the switch is
released. The SPI pulse is not used by the TCAS.
Lets selection of transponder identification code. The transponder
inserts this code into replies to Mode A interrogations or Mode S
ATC identification requests from ground stations. The ATC IDENT
code is not used by TCAS.
Shows transponder ATC identification code set by the Code Select
Knobs and shows which transponder is selected by the function
selector switch. The display gives an R annunciation when
selected transponder is replying to interrogations.
Illuminates (amber) for some failure conditions found by the Mode
S transponder (refer to TRA-67 ATC Mode S Transponder System
Maintenance Manual I.B. 1167 for the details).
Function
34-45-47
Page 96
1 Dec 2003