Operating Instructions
TCAS791
2-4
Pilot’s Guide
Table 2-1. Controls and Indicators (Continued)
No
Description
9
Range Button
The range button (labeled RNG) is on the front of the CD605. If
you’re using an alternate display, display range selection is usually
controlled from a discrete button in the cockpit. If you are using the
CD605 and an alternate display, you can use both range buttons.
The avionics dimming input from your aircraft controls the
brightness of the light inside the range button on the CD605.
Pressing the range button when in standby switches the TCAS791
out of standby and into the 10 nmi range and the above display
mode. (Alternate displays may switch into some other range and
altitude display mode.)
Pressing the range button repeatedly when not in standby toggles
the display through the available display ranges. Figure 2-2 lists the
CD605 display ranges. (Display ranges on alternate displays may
vary.) The selected range is indicated on the screen.
Pressing and holding the range button when on the ground and not
in standby changes the range and then switches the TCAS791 into
standby. Pressing and holding the range button in flight has no
effect other than changing the range.
10
Power/Brightness Control
Rotating the DIM/OFF knob on the CD605 clockwise turns on the
CD605 and the TRC and increases the brightness of the display. If
you’re using an alternate display, you’ll use a discrete TCAS
ON/OFF switch to turn on the TRC.
Some alternate displays have a built-in photocell that automatically
controls the display’s brightness. (See figure 2-3.) Other alternate
displays use the cockpit dimming input to control display
brightness. Other alternate displays have no display dimming
controls.
11
Other Traffic
This symbol represents traffic within the selected display range and
altitude display mode that is not proximate traffic nor traffic
generating a TA. Non-altitude reporting intruder aircraft are
considered to be at the same altitude as your aircraft.
On some alternate displays, other traffic symbols will disappear
when a TA occurs and will reappear (if still in range) once the TA
goes away. Some alternate displays can also be strapped to filter out
all other traffic.
