3. The NDB frequency associated with
the approach, if any. The NDB
frequency is the frequency of a
compass locator at the outer, middle,
or inner marker beacons.
(3) Vertical Scrolling. Vertical scrolling has
the following characteristics:
frequency data for other runways and
wrap around in both directions if more
than one page of information exists.
2. Data line 1 will remain fixed during
The frequencies will be displayed in groups of
three per page. A maximum of 12 frequencies or 4
pages may be accessed.
t. Communication Radio Control.
(1) Communication Radio Control Overview.
The FMS-800 provides control of the following
functions from the CDU, for the ARC-210 V/UHF radio:
1. V/UHF radio mode selection.
tone, and modulation control.
3. V/UHF radio scanning operation.
4. HAVE QUICK I/II function control,
selection, time synchronization, date
SINCGARS control functions.
In addition, the Flight Displays provide heads up
control and display of the communication radios.
Communication radio frequency selection is
available via the communication page by selecting the
COM function key of the CDU. The V/UHF control
pages provide the basic radio control features.
Specialized pages such as the V/UHF HAVE QUICK II
setup pages and SINCGARS control pages are also
If the FMS-800 cannot interface with a radio for
any reason (i.e., LRU failure, data bus failure, etc.), a
check mark () will be displayed to the left of the title
line of all pages corresponding to that radio. A will
also be displayed on the communication pages
adjacent to the preset number of the LRU.
Power to the communication radio is controlled
via the power pages.
The FMS-800 also has provisions for an
external, crew activated emergency mode switch for
frequencies, if installed on the aircraft.
(2) V/UHF Radio Control.
(a) V/UHF Frequency Selection. The
crew may tune the V/UHF radios by frequency,
Frequency tuning is performed directly on the
frequency in the scratchpad and pressing the channel
selection line select key. Refer to Figure 3B -118 and
Table 3B -81. A valid frequency is entered as two to
three digits followed by up to four decimals, followed
by A, AM, F, or FM to define the modulation type. An
M is displayed as the preset number to indicate the
frequency was entered manually. Possible ways of
tuning the communication radio are with manual
identifiers, or maritime channel entries), preset callsign
entry, preset number selection, or airport frequency
Figure 3B-118. Frequency Control,
Table 3B-81. Frequency Control,
Pressing the function key COM will
access the communication page.
Enter airport identifier and access the
V/UHF airport frequency page.