TRAFFIC ALERT AND COLLISION AVOIDANCE SYSTEM (TCAS) (Cont)
CONTROL OPERATION
TCAS modes selection and other controls are done using the FMS CDU, MFD radio menus and the DCP.
The radio menu provides basic transponder and TCAS control. The TRANSPONDER/TCAS menu provides control dis-
play for other transponder and TCAS operations. The active beacon code, TCAS mode, and TCAS altitude limits selection
that show on the left of the TRANSPONDER/TCAS menu are identical to the TRANSPONDER/TCAS display on
the radio menu.
MFD controls using the DCP:
1. If the selection box is not displayed on the MFD radio menu, push the RADIO push button on the DCP
2. Turn the MENU knob on the DCP to position the selection box around the desired radio tune frequency/channel/
mode display.
When using the active tune method the frequency color changes from green to white. Active tuning is used for transponder
beacon code selection. Usually radio control other than frequency/channel tuning is done on the radio’s sub menu. Radio
control uses the selection box method as follows:
1. Repeat steps 1 and 2 above to position the selection box within the display for the desired radio on the MFD radio
menu.
2. Push the RADIO push button and the sub menu for the selected radio will replace the top level menu. (The process
of tuning on the MFD radio sub menu is identical to tuning on the MFD radio menu).
3. Turn the MENU knob to position the selection box around the desired radios control.
4. Turn/push the DATA knob on the DCP to select the desired state of the selected control
The selection box returns to its MFD main radio menu home position after 20 seconds of no activity on the sub menu or by
again pushing the RADIO (on the DCP) push button again. Pushing a menu push button will replace the sub menu with the
top level menu and operate as required for the push button. The selection box is immediately positioned around the tune
frequency/channel display on the sub menu and frequency/channel is tuned if the TUNE knob is turned, or the
knob is
pushed.
The beacon code entry uses active tuning control operation and any code may be entered between 0000 and 7777. The
IDENT switch is located on both control wheels and stays active for approximately 18 seconds when pushed.
The TRANSPONDER/TCAS mode selection and annunciation is on the TRANSPONDER/TCAS radio primary display
page on the MFD and on the TRANSPONDER/TCAS control radio submenu. Selections are as follows:
- When using the DATA button the possible mode selections in order of succession are STBY, TA/RA, TA ONLY,
ALT ON, ALT OFF. The order reverses if the DATA knob is turned counterclockwise
- When STBY, ALT ON or ALT OFF are selected, a 2 second delay is imposed before transmitting that mode selec-
tion to the TCAS. When STBY is selected, a 2 second delay is imposed before transmitting to ATC. The standby
command delay prevents transient selection of standby during mode selection
- The transponder reports altitude in TA/RA, TA ONLY and ALT ON modes.
- The TRANSPONDER/TCAS mode selection on the MFD display is replaced with XPDR FAIL if the transponder
is failed and the mode is not in STBY
- When ALT OFF is selected, a 2 second delay is imposed before transmitting the mode selection to
prevent transient selection during mode selection
The altitude limits selection and annunciation is on the TRANSPONDER/TCAS radio primary display and TRANSPON-
DER/TCAS radio sub menu. The selections are as follows:
- When using the DATA button the possible selections are ABV, NORM, BLW, and ABV/BLW. The order reverses
if the DATA knob is turned counterclockwise
- ABV selects the above altitude limit, BLW selects the below altitude limit. When both are selected, the unre-
stricted altitude mode is invoked. When NORM is selected, ABV and BLW are deselected
- The altitude limits selection is inoperative if XPDR FAIL is annunciated
- Relative (REL) or absolute (ABS) on the TRANSPONDER/TCAS sub menu is enlarged when selected
- An open diamond symbol represents non-threat traffic that is displayed below the TRAFFIC legend. When OFF is
selected, non threat traffic is not displayed. When ON is selected all traffic is displayed
- Transponder selection is on TRANSPONDER/TCAS radio sub menu. When ATC1 or ATC2 is the active transpon-
der, the selected transponder is enlarged
Challenger Global 300 - Navigation
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