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audio integrating system.
VHF Navigation System Components
Figure 17−10−37
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−34
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
VHF NAVIGATION SYSTEM (CONT'D)
VHF Navigation Radio Audio
The NAV 1 and NAV 2 controls on the audio control panel are used to turn ON or OFF, and
adjust the audio volume of, the navigation radios. The VOICE/BOTH switch filters the tone from
the NAV ground station beacons when the VOICE position is selected.
Marker beacon audio may also be monitored through the MKR 1 and MK 2 switches. The outer
marker provides a 400 Hz tone, the middle marker provides a 1300 Hz tone, and the inner
marker provides a 3000 Hz tone.
VHF Navigation Radio Audio Control
Figure 17−10−38
VHF Navigation Radio Tuning
Tuning of the VHF Nav radios may be carried out using the control display units (CDUs)
associated with the flight management system (FMS). Alternatively, the cursor control panels
(CCPs) may be used to control a tuning menu presented on the MFDs.
The VHF Nav radios may also be automatically tuned by the FMS. The radios include circuitry
that automatically identifies navigation ground stations. This makes it possible for the FMS to
query its navigation database, and automatically tune the navigation radios.
All tuning input is provided directly to the associated navigation radio, as well as to the
integrated avionics processing system (IAPS). The IAPS echoes the display of radio tuning
information on all MFDs and CDUs, regardless of the tuning method used.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−35
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
VHF NAVIGATION SYSTEM (CONT'D)
CDU Tuning
Tuning and control of the VHF Nav radios may be carried out from the CDU TUNE page. The
page is accessed by selection of the TUN function key on the CDU. The TUNE page provides
primary control of all installed radios, including the VHF navigation radios.
VHF navigation radio titles, NAV1 and NAV2, are shown on page 1 of the TUNE page. Active
frequencies appear in green on the data line directly below the corresponding radio title. There
is no recall frequency line key on the CDU for the VHF Nav radios.
A new frequency may be entered by direct tuning, selecting a numbered preset frequency, or by
permitting the FMS to carry out automatic tuning.
Direct tuning from the CDU is carried out by first keying in the desired frequency on the
scratchpad, followed by pushing the radio’s line key. This moves the scratchpad frequency to
the active frequency line.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−36
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
VHF NAVIGATION SYSTEM (CONT'D)
CDU TUNE Page
Figure 17−10−39
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−37
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
VHF NAVIGATION SYSTEM (CONT'D)
NAV CONTROL Page
The VHF Nav radio’s CONTROL page (NAV 1, 2 CONTROL) is accessed from the TUNE page
by pressing the key adjacent to the radio title.
The control page provides access to the following functions:
• Active frequency selection;
• Preset frequency selection;
• Test;
• Nav autotune enable;
• DME hold; and
• Marker beacon sensitivity.
Preset frequencies are shown at the bottom of the control page. Up to 20 preset frequencies
may be stored for the VHF Nav radios. Changing a preset frequency is possible by keying in a
new frequency on the scratchpad, then selecting a line key to place it on the preset list. A preset
frequency can be made active by selecting a preset line key (with the scratchpad empty). As a
result, the selected preset frequency is moved to the active frequency line.
Pushing the TEST line key causes the VHF Nav and DME radios to simultaneously perform a
self-test. The test lasts for 10 seconds, during which the TEST annunciator enlarges, and the
following indications are shown on the flight displays:
• If VOR frequency tuned – bearing shows 0°;
• If LOC/GS frequency tuned – fly left and fly up indications;
• Marker beacon – 400 Hz audio tone is enabled on the audio system;
• DME shows 100 NM;
• Time to Go (TTG) shows 60 minutes;
• Station ID shows ‘AOK’; and
• Ground speed (GS) shows 100 kt.
A cyan AUTO annunciation is displayed when FMS autotune is enabled. Autotuning allows the
　
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