User Guide

139
To use your prestored channels, press briefly on the “chan”
button. The inner tuning knob will now scroll through the preset
channels, displaying them in the standby frequency window.
When you reach the one you want, press the double-arrow trans-
fer button to make it active.
VOR NAVIGATION
The right side of each KX-155 is the “nav” side, and while it
operates in conjunction with a separate nav indicator in the panel,
it can also display navigation information directly.
ADVANCED OPERATION
Like the comm side, the nav side of the KX-155 has some
nifty extra features, accessible via the little white “mode” button
below the frequency display.
Don’t want to use the VOR indicator (or, perhaps, it’s in use
by another unit like the GPS receiver, of which more later)? Push
the mode button once, and the standby side of the nav frequency
display changes to an electronic OBS which can be set by pulling
out the inner nav frequency knob, while an electronic version of
the left-right CDI needle appears below it.
You can still change back and forth between the active and
“blind” standby frequency using the double-arrow transfer switch;
and as long as the inner knob is pushed back in, you can tune the
active frequency directly. Tune a localizer frequency, and the let-
ters LOC appear in the OBS area. If the received frequency for
either VOR or a localizer is too weak, the word “FLAG” will
appear and the “needle” of the electronic CDI will disappear.
COMMUNICATIONS
Your airplane is equipped with
two KX-155A “nav-comm” radios. The
name indicates that each radio incorpo-
rates both navigation and communica-
tions functions; in fact, for all practical
purposes each of these units comprises
two completely separate systems, one
for navigation and one for communica-
tions.
The left side of the radio is the
“comm” side. It displays two frequen-
cies: the “active,” the one actually in
use, at the extreme left side of the unit, and the “standby,” or pre-
selected frequency, to its right. In normal use, frequency selection
affects only the standby frequency; the outer knob changes whole
megahertz (mHz), while the inner knob changes the figure to the
right of the decimal in steps of .05 mHz. If you need to tune one
of the more recent “split” frequencies, in steps of .025 mHz, pull
the inner knob out, then turn it.
To make your new setting the active frequency, push briefly
on the double-headed arrow button to the left of the tuning knob.
The standby and active frequencies will “flip-flop;” thus, the for-
mer active frequency is now maintained on the standby side in
case you need to change back to it quickly. It’ll be overwritten
next time you make a frequency input.
ADVANCED OPERATION
The comm radio can be preset to store often-used frequen-
cies in a series of preset “channels.” To program these, press and
hold the small white “chan” button for two seconds. The unit will
now display a flashing channel number, indicating that the chan-
nel can be programmed.
Select which channel number you want to enter by turning
the inner knob. Then press the double-arrow transfer button; the
standby frequency will flash, and can be changed by using the
inner and outer knobs in the usual fashion. Press the transfer but-
ton again to store the frequency and, if you wish, select another
channel to program. When you’re done programming, press the
“chan” button again to return to normal operation and save all the
channels you’ve loaded.
Flight Instruction
Flight Instruction
138