BendixKing KXP 756 - Manual (Page 20)

19
KFS 579A TACAN
Control Unit
Rotate the “VOL” control knob
clockwise from the “OFF” position. The
display will light.
Display Modes
Standby Entry
Two Tacan channels are
displayed; one in the Active display
and the other in the Standby display.
Select desired channel in standby
display by rotating the tuning knobs
either clockwise or counterclockwise.
The larger knob will change the 10's
and 100's digits of the standby display.
When changing display past either
end of specified frequency range the
display will roll over to the other end of
the frequency range. The small knob
will change the unit's ending digit in
the standby display. It also selects X
or Y channel; with knob out,either X or
Y channels are present and with knob
in either X or Y channels are present
depending on which was displayed
prior to pushing the small knob in.
Channels 0 and 127 thru 129 X
or Y are displayed but are not valid
Tacan channels and will flash to
indicate their invalidity. The Tacan
receiver will tune to the invalid
frequency.
To tune the receiver to the
desired channel the desired channel
must first be entered into the Standby
display, and then the Transfer button
must be pushed for less than 2
seconds. This will trade the channel of
the Active and Standby window. The
Tacan receiver is always tuned to the
channel in the Active window.
Active Entry
The Active Entry mode is entered
by pushing the Tranfer button for
longer than 2 seconds. The tuning
knobs operate as in Standby Entry,
but as the active channel display
changes so does the tuned frequency
of the Tacan receiver. The standby
entry will be blanked.
Momentarily pushing the Transfer
button causes the standby entry to
reappear and the Standby channel
prior to Active Entry mode remains
unchanged.
Remote Transfer
(Optional Remote Installation)
Operates identically as front
panel Transfer button. Grounding
indicated pin actuates transfer,
however, holding the pin at ground for
more than 2 seconds will not change
the mode of the unit to Active Entry.
Control Disable
By grounding Pin 8, the front
panel and remote controls are made
nonfunctional. The transceiver is tuned
to the frequency in use prior to
disabling.
TACAN
VOL
OFF
S
B
Y
PUSH
TST
99
109
ACTIVE WINDOW
STANDBY WINDOW
ON/OFF/VOL/TEST
PHOTOCELL
TRANSFER
BUTTON
FREQUENCY
CONTROL KNOBS
ı
x
y