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Bearing Pointer Selection
The BRG pushbuttons on the DCPs allow selection of pilot’s side or copilot’s side VOR
information in the form of bearing pointers. The single magenta bearing pointer displays the
direct bearing to the NAV 1 VOR station. The cyan double bearing pointer displays the direct
bearing to the NAV 2 VOR station.
Both pointers may be displayed simultaneously on either PFD’s HSI, and on the HSI, NAV
SECTOR, and FMS MAP formats of the MFD.
NAVIGATION SYSTEMS
Description
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CL−604 Operating Manual
PSP 604−6
VHF NAVIGATION SYSTEM (CONT'D)
Cross-Side Course Display
The PUSH X-SIDE inset button on the NAV SOURCE knob may be used to display cross-side
course information on the HSI and NAV SECTOR MFD formats.
Controls and Indicators
The figures that follow outline the controls and indications relevant to VHF navigation. Refer to
Chapter 6, Communications, and Chapter 11, Flight Instruments, for additional information on the
radio tuning unit (RTU) and EFIS displays.
NAVIGATION SYSTEMS
Description
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CL−604 Operating Manual
PSP 604−6
VHF NAVIGATION SYSTEM (CONT'D)
VHF Navigation RTU Display
Figure 17−10−42
NAVIGATION SYSTEMS
Description
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PSP 604−6
VHF NAVIGATION SYSTEM (CONT'D)
Audio and Display Control Panel
Figure 17−10−43
Flight Control Panel Course Knobs
Figure 17−10−44
NAVIGATION SYSTEMS
Description
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PSP 604−6
VHF NAVIGATION SYSTEM (CONT'D)
PFD Navigation Display
Figure 17−10−45
NAVIGATION SYSTEMS
Description
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PSP 604−6
VHF NAVIGATION SYSTEM (CONT'D)
MFD Navigation Display
Figure 17−10−46
NAVIGATION SYSTEMS
Description
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PSP 604−6
VHF NAVIGATION SYSTEM (CONT'D)
PFD − VHF NAV − Failure Displays
Figure 17−10−47
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
1,213 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.
NAVIGATION SYSTEMS
Description
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DISTANCE MEASURING EQUIPMENT (DME) SYSTEM (CONT'D)
Tuning
Each DME is a three-channel transceiver. Channel one is manually tuned by the on-side 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.
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
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