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Cross Side Operation
Either RMU can be used to control the left or
right COM/NAV units. With the cursor in any
window except the ATC or TCAS display,
pressing the 1/2 function key at the bottom of
the RMU transfers the entire RMU operation
to the cross-side system. If the cursor is in
the ATC or TCAS display window, pressing
this key selects which transponder will be in
operation.
RMU Display Color Coding
The digits displaying frequency for COM,
NAV, ADF, and ATC code are white when they
have been tuned by that RMU. They are yel-
low when they were remotely tuned by the
opposite RMU, the FMS, or the Clearance
Delivery Head. The modes for ATC/TCAS,
ADF, and TCAS range will be displayed in
green when selected by that RMU but will be
yellow when selected on the opposite side
RMU. For example, if the transponder mode
is selected to “1 ATC ON” using the right
RMU, “1 ATC ON” will be green on the right
RMU and yellow on the left RMU.
When the 1/2 function key is depressed to se-
lect cross-side operation on either RMU, the
color of the legends at the top of each window
will change to magenta to make it apparent to
the operator that cross-side is selected.
COM Tuning Operation
Normal operation of the RMU is with the radio
tuning page displayed (Figure 16-8). A section
for COM is located in the upper left corner. The
COM window has two lines, displaying COM
frequencies. The top line displays the active
frequency of the COM, while the line below
it displays a preset frequency. Upon pressing
the line select key adjacent to the lower (pre-
set) frequency, a yellow cursor (box) will
move to enclose that frequency. This step is
not always necessary since the cursor nor-
mally “parks” over the preset frequency box.
Anytime the cursor has been moved to an-
other spot on the main radio tuning page, it will
automatically return to the COM preset fre-
quency after 20 seconds of inactivity on that
page. When the cursor is overlaying the pre-
set frequency, the frequency can be changed
by adjusting the tuning knobs. The preset fre-
quency can then be changed (flip-flopped)
with the active frequency by depressing the
transfer key (top, left key).
When the preset frequency is changed with the
tuning knobs, the nomenclature, which pre-
viously said MEMORY, with a number fol-
lowing it, changes to TEMP, indicating that the
preset frequency has not been stored in the
main memory of the RMU.
The storage function can be accomplished by
pressing the STO (store) button located at the
bottom of the RMU. When the STO button is
depressed, the nomenclature beneath the pre-
set COM frequency will change back to MEM-
ORY, and the digit following “MEMORY”
will indicate in which memory location the fre-
quency is stored (Figure 16-8).
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
16-15
FOR TRAINING PURPOSES ONLY
FlightSafety
international
Honeywell
TUNE
SQ
DIM
1/2
STO
DME
TST
PGE
ID
PAGE MENU SYSTEM 1
RADIO PAGE
NAVIGATION
ENGINE PG1
ENGINE PG2
MAINTENANCE
COM MEMORY
NAV MEMORY
ATC/TCAS
RETURN
MLS
Figure 16-9. Page Menu on RMU