AIRPLANE
OPERATIONS
MANUAL
NAVIGATION AND
COMMUNICATION
MARCH 30, 2001
2-18-13
Page
3
Code
01
On airplanes Post-Mod. SB 145-23-0003 or with an equivalent
modification factory incorporated, it also changes the
frequencies in the VHF sub-band that contains the 8.33 kHz
spaced channels according to appropriate selection on the
RMU. These frequencies are identified in voice communications
by the channel names as exemplified below:
Frequency (MHz) Spacing Channel Name
132,0000 25 132,000
132,0000 8.33 132,005
132,0083 8.33 132,010
132,0166 8.33 132,015
132,0250 25 132,025
132,0250 8.33 132,030
132,0333 8.33 132,035
132,0416 8.33 132,040
132,0500 25 132,050
132,0... 8.... 132,...
− Outer knob changes the frequency non-decimal digits in steps of
1 MHz for both VHF and VOR/LOC.
11 - NORMAL/EMERGENCY MODE SELECTOR KNOB/BUTTON
− When knob rotated clockwise selects normal Mode.
− When knob rotated counterclockwise selects Emergency Mode.
− On airplanes Post-Mod. SB 145-23-0003 or with an equivalent
modification factory incorporated, the EMRG button toggles the
Emergency mode on and off.
12 - TRANSFER BUTTON
− Alternately selects between the COM frequency (top) or the NAV
frequency (bottom) to be connected to the Tuning Knobs.
− In the NAV only or COM only configurations, toggles the active
(top) frequency with the preset (bottom) frequency. In addition,
holding the button down for two seconds will remove the preset
frequency and place the unit in the Direct Tuning Mode. To
return to the Active/Preset Tuning Mode, hold down the transfer
key for two seconds.
13 - RADIO TUNING ANNUNCIATION
− Identifies the frequency at the top and bottom lines.
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