Honeywell CAS-100 Maintenance Manual page 117

Table 18. CTA-81A Control Unit Controls and Indicators (cont)
Control/Indicator
(See Figure 10)
TCAS RANGE Switch
ABOVE/NORM/BELOW Switch
ABOVE Position
NORM Position
BELOW Position
ATC IDENT Pushbutton
Switch
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MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
Four position rotary switch. Sets 15, 10, 5, or 3 nautical mile (NM)
range scale for the traffic display. The set display scale is
annunciated 15 NM, 10 NM, 5 NM, or 3 NM on the traffic display.
(NOTES 5., 6., and 8.)
Three position toggle switch. Sets relative altitude display limits for
nonthreat category aircraft (open-white diamond symbols) on the
traffic display.
(NOTE 7.)
Sets display of nonthreat aircraft maximum +8700 feet above own
aircraft and down to -2700 feet below own aircraft. ABOVE is
annunciated on the traffic display.
Sets display of nonthreat aircraft maximum +2700 feet above own
aircraft and down to -2700 feet below own aircraft on the traffic
display.
Sets display of nonthreat aircraft down to -8700 feet below own
aircraft and maximum +2700 feet above own aircraft. BELOW is
annunciated on the traffic display.
When this switch is pushed and released, in 18 seconds a Special
Position Identifier (SPI) is inserted for 18 seconds into the
transponder Mode A, DF-4, DF-5, DF-20 and DF-21 Mode S
replies to interrogations from ground stations. 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 TCAS.
Function
34-45-47
Page 88
1 Dec 2003