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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
Description
Vol. 2 17−10−50
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
DISTANCE MEASURING EQUIPMENT (DME) SYSTEM (CONT'D)
MFD − VOR/DME Status Page
Figure 17−10−48
Controls and Indicators
The DME distance and station identifier are displayed in the lower left corner of the PFD. When
DME system information is not valid or unavailable, the DME distance display is removed.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−51
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
DISTANCE MEASURING EQUIPMENT (DME) SYSTEM (CONT'D)
On the PFD, the H annunciator, next to the frequency readout, indicates that the HOLD mode has
been selected.
On the MFD, DME information is displayed on the upper left corner of the HSI and NAV SECTOR
format, when VOR/LOC is selected as the NAV SOURCE.
On aircraft equipped with “Precision Plus”, DME 1 and DME 2 are continuously displayed on the
left and right sides of the MFDs.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−52
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
DISTANCE MEASURING EQUIPMENT (DME) SYSTEM (CONT'D)
DME Controls (RTU/Audio Control Panel)
Figure 17−10−49
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−53
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
DISTANCE MEASURING EQUIPMENT (DME) SYSTEM (CONT'D)
DME Displays (PFD/MFD)
Figure 17−10−50
AUTOMATIC DIRECTION FINDER (ADF) SYSTEM
Description
The automatic direction finder (ADF) system is a dual low-frequency radio navigation system (ADF
1 and ADF 2). The receivers are independently tunable in 0.5-kHz increments, in the frequency
ranges of 190.0 to 1799.5 kHz and 2179 to 2185 kHz. The transmitting stations can be
non-directional beacons (NDBs) or standard AM broadcasting stations.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−54
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
AUTOMATIC DIRECTION FINDER (ADF) SYSTEM (CONT'D)
Components and Operation
ADF Receivers
The ADF receivers supply bearing-to-station and audio outputs to the navigation and audio
systems, and digital bus outputs to the integrated avionics processing system (IAPS) and
electronic flight instrument system (EFIS).
ADF 1 is powered by the DC essential bus, and ADF 2 is powered by DC bus 2.
ADF Antenna
The ADF Antenna contains one sense antenna and two loop antennas, mounted 90° relative to
each other.
ADF Tuning
The ADF receiver is normally tuned by the on-side RTU, but may also be tuned by the
cross-side RTU, or by the FMS. The audio is controlled by ADF 1 and ADF 2 switches on the
audio control panel. A VOICE/BOTH switch filters out the station identification, or selects both
identification and voice.
When the 1/2 switch on the RTU is pushed, each RTU can control the on-side and cross-side
ADF receivers.
ADF Bearing Pointer Selection and Navigation
The BRG pushbuttons on the DCPs allow selection of pilot’s side or copilots’s side ADF
information, in the form of bearing pointers. The magenta single bearing pointer displays the
direct bearing to the ADF 1 station. The cyan double bearing pointer displays the direct bearing
to the ADF 2 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.
ADF bearings cannot be coupled to course tracking or flight guidance systems. If navigation is
being conducted using ADF information, the pilot is responsible to assign heading or course
commands using the airplane’s other navigation systems.
ADF Operation Modes
The ADF system has two selectable modes of operation: ANT and ADF.
• When ANT is selected on the ADF page of the RTU, the NDB station signal may be
received at long range, but no bearing information is available.
• When ADF is selected, the reception range for the NDB signal is reduced, but bearing to
the station is available.
NOTE
When HF communications is required and the microphone is keyed,
the ADF pointers will freeze during HF transmissions.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−55
REV 66, Feb 01/07
CL−604 Operating Manual
PSP 604−6
　
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