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10). The unit will automatically exit the
channel mode, with the channel frequency
remaining in the STANDBY window, if no
channel is selected within 5 seconds after
entering the channel selection mode. The
channel frequency is then made the
ACTIVE frequency in the normal manner
by pressing the COMM TRANSFER button.
NOTE: An optional remote mounted channel
switch may be installed that increments the
next programmed channel into the standby
window each time the switch is activated.
The unit is placed in the transmit mode
by depressing the MIC KEY button. The
unit has a stuck microphone alert feature.
If the microphone is keyed continuously for
greater than 33 seconds, the transmitter
stops transmitting and the active Comm
frequency flashes to alert the pilot of the
stuck microphone condition.
NAV Receiver
The right portion of the display is allocated
to NAV receiver information. The
frequency channeling is similar to the
COMM when operating in the frequency
mode (Figure 1A and 1B). The NAV increment/
decrement knobs are located on the
right hand side of the front panel. The
outer knob operates in 1 MHz steps and
increments/decrements the STANDBY frequency
display.
The inner knob operates in 50 kHz
steps. The NAV receiver’s lower and
FIGURE 9
Entering channel selection mode
FIGURE 10
Selecting desired channel
19
KX 155A/165A
upper frequency limits are 108.00 MHz
and 117.95 MHz. Exceeding the upper
limit of frequency band will automatically
return to the lower limit and vice versa.
Depressing the NAV frequency transfer
button for 2 seconds or more will cause
the display to go in to the ACTIVE ENTRY
mode. Only the ACTIVE frequency will be
displayed and it can be directly changed
by using the NAV inc/dec knobs. The display
will return to the ACTIVE/STANDBY
mode when the NAV frequency transfer
button is pushed.
Depressing the mode button will
cause the NAV display to go from the
ACTIVE/STANDBY format to the
ACTIVE/CDI (Course Deviation Indicator)
format as shown in Figure 11. The vertical
“needle” moves side to side similar to a
mechanical CDI. When the needle is centered,
the aircraft is on the selected OBS
course. When the active frequency is
tuned to a VOR frequency, the center of
the CDI scale displays the “TO” or “FROM”
indicator.
In the CDI mode, the increment/decrement
knob (pushed in) channels the
ACTIVE frequency window and depressing
the frequency transfer button will
cause the ACTIVE frequency to be placed
in blind storage and the STANDBY frequency
(in blind storage) to be displayed
in the ACTIVE window display.
When the ACTIVE window is tuned to
a VOR frequency, the standby frequency
area is replaced by a three digit OBS
(Omni Bearing Selector) display. The
desired OBS course can be selected by
pulling out the inner NAV frequency knob
and turning it. The CDI needle may be
automatically centered with a “TO” indication
by depressing the mode button for 2
seconds. This OBS display is independent
of any OBS course selected on an
external CDI or HSI. An “OBS” in the
middle of the NAV display will flash while
the inner NAV frequency knob is pulled
out. The CDI is displayed on the line
below the frequency/OBS.
FIGURE 11
Nav display active VOR frequency/
CDI format
20
Silver Crown Plus Pilot’s Guide
When the ACTIVE window is tuned to a
localizer frequency, the standby frequency
area is replaced by “LOC” (Figure 12).
When the received signal is too weak
to ensure accuracy the display will “flag”.
See Figure 13.
Depressing the mode button will
cause the NAV display to go from the
ACTIVE/CDI format to the
ACTIVE/BEARING format. In the BEARING
mode, the increment/decrement
knob channels the ACTIVE frequency
window and depressing the frequency
transfer button will cause the ACTIVE frequency
to be placed in blind storage and
the STANDBY frequency (in blind storage)
to be displayed in the ACTIVE window
display. In bearing mode of operation,
the right hand window of NAV display
shows the bearing TO the station.
Figure 14 illustrates the NAV side of
the display in this mode.
When a too weak or invalid VOR signal
is received the display flags as shown
in Figure 15.
Another push of the mode button will
cause the NAV display to go from the
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