6. C.
(15) (b)
TCAS Mode Selection
The DC-884 provides two places to select TCAS pages: the
navigation map mode menu and the system mode menu. The
navigation map mode menu allows the on-side pilot or copilot to
select TCAS display for the on-side navigation display. The
system mode menu allows selection of the TCAS format on the
system menu. The TCAS system
menu is selectable by either the
pilot or copilot from their DC-884.
Also, the TCAS computer
can automatically select the TCAS system page for display
whenever it determines an intruder to be a traffic advisory
(TA) or a resolution advisory (RA). This is accomplished
through tying the TCAS TA and RA (preventive and corrective)
lamp driver discretes to a system page select discrete on the
DC-884.
Navigation Map Mode Menu (See figure 6-22.3)
While TCAS is installed, the navigation
map menu provides a
TCAS selection on right line select key No. 3 The TCAS
selection will be ON when
boxed and OFF when unboxed.
Power-up default for the navigation page menu will be to
the ON (boxed) selection. On the ND map menu, TCAS
selection will not deselect any other mode.
System Mode Menu (See figure 6-22.4)
While TCAS is installed, the system mode menu provides a
TCAS page
selection on left line select key No. 5. TCAS
selections will be ON when boxed and OFF when unboxed.
Selection of the TCAS system page by either the pilot or
copilot causes it to be displayed on both DCS. TCAS system
page will be selected on a last entered basis. Power-up
default for the system page menu will be to the OFF
(unboxed) selection.
When TCAS is selected on the system
menu, all other selections will be unboxed.
Navigation Display Compass and Plan Modes
TCAS selections will not be available in the ND compass
mode. TCAS selections will not be available in the ND plan
mode.
Automatic TCAS System Page Select
When the TCAS system page select pin (J1-m) transitions to
ground (falling edge), the TCAS select mode on the system
mode menu will be boxed.
The TCAS selection on the system
page shall be capable of being deselected (another mode
selected - checklist, waypoint list, etc.) even if the
discrete remains in the grounded state. This discrete will
be debounced 200 msec.
DC Pin Assignments for TCAS
Pin 115/Cl15Jl-j is TCAS installed. Pin 115/Cl15Jl-m is
TCAS system page select.
22-14-00
Page 196.4
Apr 15/93
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