How to - Set Transponder (XPDR) / TCAS Modes?

[richboy2307]

If using the in-sim ATC menu functions to change the squawk code, the transponder will automatically adjust to this change, however you can manually tune the required code using the keypad (4). To enter a new code the previous one has to be cleared first using the CLR key.

The Transponders are powered on by setting the Mode Selector knob (1) to AUTO (activates airborne) or ON (activates immediately) position. 

The Altitude Reporting Switch (3) in the ON position sends barometric altitude data, equivalent to Mode C. In the OFF position no altitude data is transmitted and the upper ECAM displays "TCAS STBY" in green.

The TCAS Traffic Selector Switch (6) is used to filter out traffic. 

• THRT only shows potential threats (TA or RA targets).
• ALL shows traffic within 2700ft above or below.
• ABV shows traffic between 2700ft below and 9900ft above.
• BLW shows traffic between 9900ft below and 2700ft above.

The TCAS Mode Selector switch (7) controls the behaviour modes for TCAS.

• TA/RA: Normal position.
• TA: The TCAS does not generate any vertical orders. This mode should be used, in case of degraded aircraft performance (engine failure, landing gear extended, or approach on parallel runways).
• STBY: The TCAS is on standby.

Use the Transponder Ident button (8) to 'squawk ident' when requested by ATC.