Honeywell CAS-100 Maintenance Manual page 123

Table 19. CTA-81B Control Unit Controls and Indicators (cont)
Control/Indicator
(See Figure 11)
Function Selector Switch
(cont)
ATC 1 TA/RA Position
(cont)
ATC 2 ON Position
ATC 2 STBY Position
ATC 2 TEST Position
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MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
The Mode S transponder transmits squitters and replies fully to the
Mode S, ATCRBS Mode C, and Mode A interrogations. The TCAS
broadcasts and does all the Mode S and ATCRBS surveillance and
tracking functions. The TCAS gives the traffic displays for RA, TA,
proximity, and nonthreat category aircraft (NOTE 3.), gives RA and
TA alerts, and transmits resolution advisories on the TA/VSI or
RA/VSI.
(NOTE 4.)
On-the-Ground - The Mode S transponder squitters and replies
fully to Mode S interrogations. Depending on the Mode S
transponder strapping, the transponder replies fully or does not
reply to the Mode S, ATCRBS Mode C, and Mode A interrogations.
The power is removed from ATCRBS transponder. The TCAS
defaults to TA ONLY mode (TCAS sensitivity level No. 2) and
functions as shown for the Function Selector switch ATC 1 TA
Position (on-the-ground), in this table.
Puts the Mode S transponder and the TCAS in STANDBY mode
and turns on the ATCRBS transponder to full on condition.
Puts the Mode S transponder, the TCAS, and the ATCRBS
transponder in STANDBY mode.
Starts functional test for the ATCRBS transponder. Refer to the
ATCRBS transponder maintenance manual for the details. The
Mode S transponder and TCAS stay in STANDBY.
Function
34-45-47
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1 Dec 2003