Honeywell CAS-100 Maintenance Manual page 132

Table 20. CTA-100A Control Unit Controls and Indicators (cont)
Control/Indicator
(See Figure 12)
ENT Pushbutton
NUMERIC KEYPAD (Keypad
CTA-100A version only)
FAIL Annunciator
ROTARY CONTROL Knob (Rotary
control CTA-100A version only)
NOTES:
1. In-flight or on-the-ground status of own aircraft is determined by the weight-on-gear (air/ground) strut
switch input to the transponder and TCAS processor.
2. The TCAS can be strapped to show all the traffic, all the time or only when a TA or RA is present.
3. If own aircraft is below 500 feet AGL, the TCAS defaults to TA ONLY mode.
4. Not installed on all versions of CTA-100A.
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
The ENT pushbutton is for showing current Flight identification
when the Flight ID mode is set in the display. The ENT pushbutton
will confirm the Flight ID data entry and send the value along the
ARINC 429 databus. Selection of ENT will confirm the ATC code
data entry for rotary control versions of the CTA-100A.
The NUMERIC KEYPAD consists of pushbuttons for each number
0 through 9 and lets a procedure for entering transponder codes
and/or flight identification data into the CTA-100A display. The
NUMERIC KEYPAD buttons 0 through 7 have priority over all other
CTA-100A functions other than for the Flight ID data entry mode.
When a button (0-7) is operated, the CTA-100A will cancel the
current task, and immediately change into ATC code data entry
mode. The numeric pushbutton that was initially pushed will
become the first digit of the new ATC code.
The FAIL annunciator will come on when the set transponder and
related TRANSPONDER FAIL (No. 1 or No. 2) discrete input is in
operation. The annunciator color will be amber.
The data entry of the ATC code will use the dual concentric rotary
control. The data is recorded one digit at a time, using the outer
knob to forward to the subsequent digit. An underline is used to
identify each digit that requires entry. The inner knob is used to
move through the numbers 0-7 for each digit of the ATC code.
After each digit entry, any clockwise turn of the outer knob will
forward the data entry one digit to the right. The outer knob can be
used to backspace over incorrectly recorded data. For each detent
in the counterclockwise direction, the display will backspace one
digit. After the ATC four digit code has been entered into the
display, the code will be accepted into the system one of three
procedures. The ENT pushbutton can be actuated, the outer knob
selector can be rotated clockwise, or a 5.0 +/- 0.1 second timeout
period stops if none of the two items has occurred.
Function
34-45-47
Page 103
1 Dec 2003