Operation Manual Part 2

Aerosoft – Digital Aviation
CRJ-70 & CRJ-900
AOM PART 2
Systems Description
VOL
5
5-1-101
26-Jul-2017
DISTANCE MEASURING EQUIPMENT ( DME)
Most of the time the DME signal is tuned automatically corresponding to the tuned VOR station. The DME
system then computes the straight-line distance between aircraft and ground station. Furthermore, it provides
information on ground speed, time to station and station identification.
The CRJs two DME systems operate with three channels each. Normally the first channel is tuned automatically
corresponding to the tuned VOR station. Channels 2 and 3 are tuned automatically by the system to support
the FMS multisensory navigation.
Nevertheless, the systems allows the pilot to tune channel 2 manually first for distance measuring and then
tune a VOR station on channel 1 for bearing information.
Tuning is performed on the radio tuning unit, backup radio tuning unit. Visual indications of tuned stations,
distance readouts and DME hold indication are provided on the PFD and MFDs.