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No. 2 Bearing Pointer
Pointer removed if bearing source failed.
VOR 1
LOC 1
FMS 1
FMS 3
VOR 2
LOC 2
FMS 2
FMS 3
VOR 1
LOC 1
FMS 1
FMS 3
VOR 2
LOC 2
FMS 2
FMS 3
MFD 1 MFD 2
VOR 1
ADF 1
FMS 1
FMS 3
VOR 2
ADF 2
FMS 2
FMS 3
VOR 1
ADF 1
FMS 1
FMS 3
VOR 2
ADF 2
FMS 2
FMS 3
MFD 1 MFD 2
To/From Indicator
Indicates direction to or from a tuned VOR or selected
waypoint. Color matches navigation source.
Course Pointer
Indicates the active NAV course. The value is
numerically repeated in the course display.
Course Display
COURSE/DESIRED TRACK POINTER
BEARING POINTER
Lateral Deviation Scale
Indicates relative deviation.
Lateral Deviation Bar
Indicates airplane deviation from VOR or localizer
beam.
P604_17_026
Bearing Source Indicator
Indicates navigation source selected to obtain
bearings.
BRT
VOR1 VOR2
LX/WX+TRB+GCS
UTC11 : 42
TTG11 : 07
VOR1
CID
CRS 350 FMS2 DTK 030
TAS 250 GS 240 SAT 15C TAT–15C
TGT
30.0NM VIN 104.0NM
TTG11 : 26
50
100
340
G+3 USTB T+10.7
ALO
CID
DBQ
NAVIGATION SYSTEMS
For Training Purposes Only
Sept 04
17-61
P I LOT T R A I N I N G GU I D E
PFD - VHF NAV - Failure Displays
Figure 17-46
Navigation
Source Flag
BRT
VOR1
N
33
30
W
24
E
6
3
FD
ATT
G
S
RA
DCP2 TRU
FMS1 LOC1
VOR2
ALT
V
S
IAS
DTK
29.4NM
VIN
MSG1
MSG2
072
Display
Control Panel
Source Flag
Glidescope
Vertical
Deviation
Flag
Heading
Flag
Excessive
Lateral
Deviation/
Localizer
Comparator
Indicator
Will be absent if system is
not functioning
P604_17_027
NAVIGATION SYSTEMS
17-62 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
Distance Measuring Equipment (DME) System
Description
There are two Distance Measuring Equipment (DME) receivers installed on the
Challenger 604, DME 1 and DME 2. The DME systems measure the slant distance
between the aircraft and a ground station to a maximum range of 300 nautical miles.
Distance information is supplied to the FMSs, the PFDs and the MFDs.
Components and Operation
DME Transceivers
The DME transceivers compute distance for display on PFDs and MFDs and also
provide position updating data to the FMSs.
The transceivers transmit, receive and process RF signals to produce slant range to a
ground station. The DME frequency range consists of 252 channels in the frequency
band of 962 to 1213 MHz, designated as X and Y channels 1 to 126.
DME 1 is powered by DC Bus 1, and DME 2 is powered by DC Bus 2.
Tuning
Each DME is a three-channel transceiver. Channel one is manually tuned by the onside
RTU, the cross-side RTU or by the FMS. Channels two and three are
automatically tuned by the FMS and are used for multisensor navigation.
DME Hold
Pushing the DME-H key (on the right side of each RTU) holds the last DME
frequency. This permits changing to, and working with, another VOR/LOC station
while still receiving DME distance information from the last DME station.
DME Aural Identification
The DME three-letter Morse code identifier is supplied to the audio integrating
system. Audio outputs are monitored using the DME 1 and DME 2 switches on the
audio control panels. When listening to other NAV idents simultaneously, the DME is
recognizable by its higher pitch.
NAVIGATION SYSTEMS
For Training Purposes Only
May 03
17-63
P I LOT T R A I N I N G GU I D E
DME Status Page Selection
The DME status page can be selected by pushing the MFD MENU switch on the FMS
Control Display Unit, followed by pressing the VOR STATUS line select key. For
each DME channel, the following data is displayed:
• received DME ident
• received DME frequency
• received DME slant range
The identifier shown adjacent to the DME label corresponds to the ident received from
the DME sensor. The display of an identifier adjacent to the VOR label is determined
by the FMS. If a DME is in Hold mode, its frequency is followed with an amber “H”.
NAVIGATION SYSTEMS
17-64 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
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