Manual

ciated. When appropriate Flight Level data is available, current aircraft
Flight Level is displayed.
The lower left-hand corner annunciates the TCAS mode and TCAS
flag condition. See the list of Mode & Failure Annunciations below.
Two blocks are reserved in the lower center of the screen to display No
Bearing TA traffic. Occasionally TCAS can compute range and range
closure but not relative bearing to Intruder aircraft. “No Bearing” traffic
will be depicted as text and not a traffic symbol. A message such as
“2.0NM/-020” in yellow is a No Bearing TA for an Intruder 2.0 nm away
200 Ft. above and descending.
TA/VSI & TID CONTROLS
RANGE SELECT
Pressing the “UP” or “DN” buttons on the front bezel will
increase or decrease the selected display range. The “04”
software versions of the TA/VSI and all TID 66A/D units will
have selectable ranges of 3, 5, 10, 15, 20, and 40 nm. The
range selections on earlier TA/VSI units will be 3, 5, 10,
15 nm OR 5, 10, 20, & 40 nm, depending upon aircraft
wiring.
BRT CONTROL
This knob controls the brightness of the traffic display
screen.
TA SEL MODE ( IVA 81A/C/D ONLY)
Depending on the configuration strapping of the display,
the TA SEL MODE button will respond in one of two ways.
LIGHT SENSOR
The light sensor in the lower left corner controls the auto-
matic dimming function that adjusts the display brightness
to compensate for changing ambient lighting levels.
Controls and DisplaysCAS 66A Pilot's Guide
Effective Date 2/06006-08746-0000 Rev 7
33
Configuration Operation
Traffic Sel Traffic is only shown when a “TA” intruder is present. If the
display is “decluttered” and a “TA” becomes present, traffic
is displayed. Pressing the button “declutters” the display of
traffic. Traffic is again displayed upon any of the following
events:
1. The button is pressed again while a “TA” intruder is still
present.
2. A new “TA” intruder becomes present.
3. An existing intruder turns into a “TA.”
TCAS I Pilots Guide 2/8/06 3:52 PM Page 33