KX 155A and KX 165A VHF Communication/Navigation Transceivers

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15
KX 155A/165A
KX 155A and KX 165A
VHF Communication/Navigation Transceivers
FIGURE 1A
KX 155A and KX 165A (25 kHz Versions) CONTROL FUNCTION
Active Comm
Frequency
Standby Comm
Frequency
Active Nav
Frequency
Standby Nav
Frequency
“T” Indicates Mic Button is Being Depressed
“R” Indicates Squelch is Open by Received Signal
Photocell Provides
Automatic Display
Dimming
Nav Frequency
Select Knob
Nav Mode
Button
Nav Frequency
Transfer Button
Nav Audio
Volume Control.
Pull to Hear
Morse Code
Nav Ident.
Comm Frequency
Select Knobs
Comm Frequency
Transfer Button
Channel
Button
On/Off Comm
Volume Knob.
Pull to disable
Comm Receiver
Automatic Squelch.
Push in for
Automatic Squelch.
Active Comm
Frequency
Standby Comm
Frequency
Active Nav
Frequency
Standby Nav
Frequency
“T” Indicates Mic Button is Being Depressed
“R” Indicates Squelch is Open by Received Signal
Photocell Provides
Automatic Display
Dimming
Nav Frequency
Select Knob
Nav Mode
Button
Nav Frequency
Transfer Button
Nav Audio
Volume Control.
Pull to Hear
Morse Code
Nav Ident.
Comm Frequency
Select Knobs
Comm Frequency
Transfer Button
Channel
Button
On/Off Comm
Volume Knob.
Pull to disable
Comm Receiver
Automatic Squelch.
Push in for
Automatic Squelch.
8.33K
6
FIGURE 1B
KX 165A (8.33 kHz Versions) CONTROL FUNCTION
NOTE: The 25 kHz and 8.33 kHz versions of the KX 165A are distinguishable
from one another in two ways. The 25 kHz version has “PULL 25K” nomenclature
below the Comm Frequency Select Knobs while the 8.33 version has
“PULL 8.33K”. In addition, the 25 kHz version has two digits to the right of the
decimal in the Comm frequency while the 8.33 kHz version has three digits to
the right of the decimal. The 8.33 kHz channel spacing is required for flight in
certain European (ICAO EUR Region) airspace.
KX 155A and KX 165A Operation (25 kHz Versions)
All controls required to operate the KX 155A and KX 165A are located on the unit front
panel.
16
Silver Crown Plus Pilot’s Guide
FIGURE 2
Frequency entered in
standby display
FIGURE 3
Active/standby frequencies toggle
FIGURE 4
Frequency entered in active entry mode
COMM Transceiver
Rotate the VOL knob clockwise
from the OFF position. Pull the VOL
knob out and adjust for desired listening
level. Push the VOL knob back in to
actuate the automatic squelch.
The left portion of the digital display
readout is allocated for COMM ACTIVE
and COMM STANDBY frequencies with
a “T” between them to indicate TRANSMIT
and an “R” to indicate RECEIVE
modes of operation.
Select the desired operating frequency
in the standby display by rotating
the Frequency Select Knobs either
clockwise or counterclockwise. A clockwise
rotation will increment the previous
frequency while a counterclockwise
rotation will decrement the previous frequency.
The outer knob will change the
MHz portion of the standby display. At
one band-edge (118 or 136 MHz) the
following 1 MHz change will wrap
around to the other band-edge.
KX 155A and KX 165A 25 kHz Versions
The inner knob will change the kHz
portion of the standby display. It will
change in increments of 50 kHz when
the knob is pushed in and 25 kHz when
the knob is pulled out. The frequency
wrap around at the edge of the band is
also utilized when incrementing or
decrementing the kHz portion of the
standby display.
KX 165A 8.33 kHz Version
The inner knob will change the kHz
portion of the standby display. It allows
selection of 25 kHz frequencies only
when the knob is pushed in and both
8.33 kHz and 25 kHz frequencies when
the knob is pulled out. The frequency
wrap around at the edge of the band is
also utilized when incrementing or
decrementing the kHz portion of the
standby display.
To tune the radio to the desired
operating frequency, the desired frequency
must be entered into the standby
display (Figure 2) and then the
transfer button must be pushed. This
will trade the contents of the active and
standby displays (Figure 3).
NOTE: An optional remote mounted
transfer switch may also be installed in a
convenient location (such as the control
yoke) to perform the transfer operation.
The operating frequency can also
be entered by accessing the ACTIVE
ENTRY (direct tune) mode which is
done by pushing and holding the
COMM TRANSFER button for 2 or
more seconds. In the direct tune mode,
only the active part of the display is visible
(Figure 4). The desired frequency
can be directly entered into the display.
Push the COMM TRANSFER button
again to return to the active/standby
display.
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KX 155A/165A
The desired channel can be selected
by turning the comm kHz knob (Figure 6).
The channel frequency can be entered by
pushing the COMM TRANSFER button
which will cause the standby frequency to
flash. The comm frequency knobs are
then used to enter the desired frequency
(Figure 7). If dashes (displayed when
rotating the outer knob between 136 MHz
and 118 MHz) are entered instead of a frequency,
the corresponding channel is
skipped in channel selection mode (Figure
8). Additional channels may be programmed
by pressing the COMM TRANSFER
button and using the same procedure.
To exit the program mode and save
the channel information, momentarily push
the CHAN button. This will cause the unit
to return to the previous frequency entry
The transceiver is always tuned to the
frequency appearing in the ACTIVE display.
It is therefore possible to have two
different frequencies stored in the
ACTIVE and STANDBY displays and to
change back and forth between them at
the simple push of the transfer button.
During the transmit mode of operation,
a “T” will appear between the
ACTIVE and STANDBY displays. An “R”
will appear between the ACTIVE and
STANDBY displays if a detected signal is
strong enough to open the squelch, signifying
that the transceiver is in the receive
mode of operation.
A non-volatile memory stores the
comm ACTIVE and STANDBY frequencies
on power down. When the unit is
turned on again, the COMM ACTIVE and
STANDBY windows will display the same
ACTIVE and STANDBY frequencies that
were displayed before power down.
The KX 155A and KX 165A also have
provisions to program 32 channels.
Pressing the CHAN button for 2 or more
seconds will cause the unit to enter the
channel program mode. Upon entering
the channel program mode, “PG” is displayed
next to the channel number and
the channel number will flash indicating
that it can be programmed (Figure 5).
FIGURE 6
Selecting desired channel
FIGURE 7
Selecting desired frequency
FIGURE 8
Corresponding channel is skipped in
channel selection mode
FIGURE 5
Entering channel program mode
18
Silver Crown Plus Pilot’s Guide
mode. The unit will also exit the channel
program mode if there is no button or knob
activity for 20 seconds.
The channel selection mode can then
be entered by momentarily pushing the
CHAN button (Figure 9). “CH” is displayed
next to the last used channel number.
NOTE: If no channels have been programmed,
channel 1 appears with dashes
displayed.
The comm frequency knobs can be
used to select the desired channel (Figure
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
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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
ACTIVE/BEARING format to the
ACTIVE/RADIAL format as shown in
Figure 16. In the RADIAL 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
radial mode of operation, the right hand
window of NAV display shows the radial
FROM the station. Figure 16 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 17.
FIGURE 17
VOR mode
active/radial flag display
FIGURE 12
Nav display Active localizer frequency/
CDI format
FIGURE 13
VOR flag display
FIGURE 14
VOR mode bearing to function
FIGURE 15
VOR mode active/bearing,
flag display
FIGURE 16
VOR mode
radial from function
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KX 155A/165A
Another push of the mode button will
cause the unit to go into the TIMER
mode. See Figure 18. When the unit is
turned on the elapsed timer begins
counting upwards from zero. The timer
can be stopped and reset to zero by
pushing the NAV frequency transfer button
for 2 seconds or more causing the
ET on the display to flash. In this state
the timer can be set as a countdown
timer or the elapsed timer can be restarted.
The countdown timer is set by using
the NAV inc/dec knobs to set the desired
time and then pushing the NAV frequency
transfer button to start the timer. The
outer knob selects minutes, the inner
knob in the “in” position selects ten second
intervals, and the inner knob in the
“out” position selects individual seconds.
After the countdown timer reaches zero,
the counter will begin to count upwards
indefinitely while flashing for the first 15
seconds. Or the elapsed timer can also
be reset to zero and started again after it
has been stopped and reset to zero by
pushing the NAV frequency transfer button.
The Audio Alert, if installed, is then
sounded.
The NAV ACTIVE and STANDBY frequencies
are stored in the memory on
power down and return on power up.
When the smaller increment/decrement
knob is pushed in, depressing the
NAV TRANSFER button will interchange
the ACTIVE and STANDBY frequencies.
The NAV IDENT knob is active in the
pulled out position so that both voice and
ident can be heard. When this knob is
pushed in, the ident tone is attenuated.
The volume of voice/ident can be adjusted
by turning this knob.
FIGURE 18
Timer mode
22
Silver Crown Plus Pilot’s Guide
Pilot Configuration
This mode can be accessed by
pressing and holding the Nav Mode
Button for more than 2 seconds and then
pressing the Nav Frequency Transfer
Button for an additional 2 seconds, while
continuing to hold the Nav Mode Button.
When the Pilot Config Mode is entered
the unit will show the “SWRV” mnemonic
which is the unit software revision level.
Adjustment pages can be accessed by
MODE button presses.
The pilot may adjust two parameters
in the pilot configuration, the display minimum
brightness and sidetone volume
level.
Minimum Brightness (BRIM) will have
a range of 0 - 255. The dimmest is 0
and the brightest is 255.
Sidetone volume level is adjusted
when SIDE is displayed. Values from 0 -
255 may be selected with 0 being least
volume, 255 being the greatest.
Subsequent presses of the MODE
button sequences through SWRV, BRIM,
SIDE, and then back to SWRV.
Momentarily pressing the Nav
Transfer Button exits Pilot configuration
mode. The Nav returns to its pre-Pilot
Config state with the new brightness and
sidetone levels stored in non-volatile
memory.
Default Mode
Turning on the KX 155A or KX 165A
while pressing either the COMM or NAV
frequency transfer button will bring the
unit up in the Direct Tune Mode.
120.00MHz (120.000MHz in 8.33 kHz
KX 165A) will be the active COMM frequency
and 110.00 MHz will be the
active NAV frequency. This will aid the
pilot in blind tuning the radio in the
unlikely event of display failure.