*
Left and right VOR/ADF switches.

Navigation Display Mode Selector
Use the mode selector to select the display mode. To see VOR data, set the mode selector to the VOR position.
VOR/ADF Switch
The VOR/ADF switches select the VOR or ADF receivers as the source of data for the left and right bearing pointers on the ND. There are two switches for the left and right bearing pointers. When the VOR/ADF switches are in the VOR position, VOR data shows in the approach (APP), VOR, and map modes. When the switches are set to the off position, the VOR data goes out of view.
Alternate or Backup EFIS Control Panel
You access the EFIS control page from the MENU page on the control display unit (CDU). The EFIS control page on the CDU permits alternate or backup controls for the VOR system displays.
The left CDU is the alternate or backup control for the left EFIS control panel and the right CDU is the alternate or backup for the right EFIS control panel.
When you select EFIS control from the CDUs, the onside EFIS control panel does not operate.
On the EFIS control page you can select the ND mode display for:
*
APP

*
VOR

*
MAP.

There is no VOR display for PLAN mode. To select VOR data for the bearing pointers, you must push the OPTIONS line select key on the EFIS control page. This brings up the EFIS OPTIONS page.
The line select key next to the OFF-ADF-VOR data line on the EFIS OPTIONS page permits you to toggle between ADF or VOR data as the source of data for the bearing pointers.
OFF selection removes the bearing pointer and data.
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VOR -ND VOR DISPLAYS

General
When the navigation display mode selector on the EFIS control panel is in the VOR position and the VOR/ADF switch is set to VOR, these displays show:
*
VOR deviation bar and scale

*
NAV data source

*
VOR frequency or identifier

*
Selected course

*
Bearing pointers

*
To/from pointer and indicator

*
VOR data.

VOR displays show in the centered mode or expanded mode.
VOR Display Source
The VOR display source for the VOR mode is the onside VOR receiver only. If the left VOR receiver fails, the captain’s VOR mode will not show VOR deviation. If the right VOR receiver fails, the first officer’s VOR mode will not show VOR deviation.
VOR Deviation Bar and Scale
The deviation bar and scale shows deviation from the selected course.
NAV Data Source
The NAV data source display shows at the top right corner of the ND. The NAV data source shows which VOR system supplies the navigation data on the ND.
VOR Frequency or Identifier
The frequency or identifier shows at the top right of the ND next to the NAV data source. If the receiver gets a valid VOR ground station signal and the station identifier is present, then the station identifier replaces the frequency.
VOR Selected Course
The VOR selected course shows below the frequency or identifier. Selected course shows when there is a manual selection of the VOR station on the CDUs. The selected course becomes dashes when the AIMS cabinets autotunes the VOR stations.
Bearing Pointers
The left and right pointers show when the VOR/ADF switches are in the VOR or ADF position. The pointers show in APP, VOR, and MAP display modes. The pointers go out of view when the switches are in the off position. The pointers show around the compass arc. In the expanded mode, the pointers show if the bearing of the station is within the range of the compass arc.
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VOR -ND VOR DISPLAYS

To/From Pointer and Indicator
The to/from indications show if the selected course will take the airplane to or from the VOR station.
VOR/ADF Switch Data
The VOR/ADF data shows the data source for the left and right bearing pointers and their frequencies. The data shows at the lower corners of the ND in the APP, VOR, and MAP display modes.
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