NAVIGATION AND
COMMUNICATION
AIRPLANE
OPERATIONS
MANUAL
2-18-11
Page
12
Code
01
REVISION 31
RMU CONTROLS AND INDICATORS
RMU BEZEL PANEL
1 - FREQUENCY TRANSFER BUTTON
− When pressed, the active frequency (upper line) and the preset
frequency (lower line) in the COM or NAV windows exchange
location and function.
2 - LINE SELECT BUTTONS
− The first press of the button moves a yellow cursor box to
surround the data field associated with that particular Line Select
Button. This enables the Frequency Tuning Knobs to change the
data or the mode marked by the cursor. For some functions,
additional pressing of the Line Select Button will toggle modes or
recall stored frequencies. The Line Select Buttons, if kept
pressed, allows ADF and ATC memories to be recalled, and to
enter or exit Direct Tune Mode for COM and NAV.
3 - FREQUENCY TUNING OUTER KNOB
− Allows the data field enclosed by the cursor to be modified. The
data may be frequency setting, stored frequencies or mode,
depending upon the data field. When setting a frequency, this
knob controls the digits to the left of the decimal point.
Furthermore, this knob also controls the RMU brightness, which
is enabled by pressing the Dimming Button.
4 - FREQUENCY TUNING INNER KNOB
− Is functionally similar to the Frequency Tuning Outer Knob
except that when setting the frequency, this knob controls the
digits to the right of the decimal point.
5 - MEMORY STORAGE BUTTON
− Pressing this button will cause a temporary (TEMP) COM or
NAV pre-select frequency to be stored in the memory and
assigned numbered location, provided the cursor has first been
placed around that frequency.
NOTE: - ADF and ATC have only one memory location.
- For HF memory operation, refer to HF Memory Page
description.
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