Operation Manual Part 2

Aerosoft – Digital Aviation

CRJ-70 & CRJ-900

AOM PART 2

Systems Description

VOL

5-1-103

26-Jul-2017

AIR TRAFFIC CONTROL TRANSPONDER SYSTEM (ACT)

Two air traffic transponders (ATC 1 and ATC 2) do have three operating modes:

• Mode A

• Mode C

• Mode Select (S) – in this mode the transponder exchanges information with other aircraft with

transponders in mode S which feed the TCAS system.

The transponder code is tuned via the radio tuning unit, the FMS / CDU. ATC identification is selected using the

IDENT button on the radio tuning unit.