Honeywell CAS-100 Maintenance Manual page 114

Table 18. CTA-81A Control Unit Controls and Indicators (cont)
Control/Indicator
(See Figure 10)
Function Selector Switch
(cont)
ALT OFF Position
(cont)
ALT ON Position
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MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
In-Flight - Turns on Mode S transponder to fully active state and
places TCAS in STANDBY mode (TCAS sensitivity level No. 1).
The Mode S transponder transmits squitters and replies to Mode S,
ATCRBS Mode C, and Mode A interrogations. The Mode S
transponder reply to Mode C and Mode S does not contain an
altitude report. The transponder reply to Mode A contains the ATC
transponder code (normal Mode A reply). All TCAS broadcast,
surveillance, and tracking functions are made unserviceable. The
traffic display screen is erased but for a TCAS STBY mode
annunciation.
On-the-Ground - Mode S transponder squitters and replies to
Mode S interrogations. Depending on Mode S transponder
strapping, the transponder replies or not to ATCRBS Mode C and
Mode A interrogations. The transponder reply to ATCRBS and
Mode S interrogations does not contain an altitude report. The
transponder reply to Mode A interrogations contains the ATC
transponder code. TCAS is in STANDBY mode (TCAS sensitivity
level No. 1). The traffic display screen is erased but for a TCAS
STBY annunciation.
In-Flight - Same effect on the Mode S transponder and TCAS as
ALT OFF position (in-flight) other than the Mode S transponder
reports altitude in its Mode C and Mode S replies.
On-the-Ground - Same effect on the Mode S transponder and
TCAS as ALT OFF position (on-the-ground) other than the
transponder reports altitude in its Mode C and Mode S replies (if
strapped to respond to Mode C when on-the-ground).
Function
34-45-47
Page 85
1 Dec 2003