BendixKing SILVER CROWN PLUS System SILVER CROWN PLUS - Manual (Page 53)

KT 70/KT 71
49
shown on the display, while the
altitude display is disabled.
TST (TEST) - Replies are disabled in
test mode, and the unit illuminates all
segments of the display for at least
four seconds. A series of internal tests
is performed to check the KT 70/71’s
integrity, verifying all EEPROM data
and making hardware and squitter
checks.
Should a squitter error occur, the
transmitter is considered inoperative,
and the message “F01” will appear on
the altitude display. Should an
EEPROM error be detected, the
messages “F02” (internal) or “F03”
(external) will appear. If the KT 70 or
KT 71 detect a hardware failure that
prohibits normal operation, the
message “F04” will be shown. If no
errors are detected, the unit remains
in test mode.
GND (GROUND) - In the KT 71, all
interrogations are inhibited. In the KT
70, ATCRBS (Air Traffic Control
Radar Beacon System) Mode A&C
interrogations are inhibited, but the KT
70 will reply to all valid Mode S
interrogations, provided a Mode S
status bit is set to indicate the aircraft
is on the ground. In both units, the ID
code is shown on the right side of the
display, with altitude reported on the
left side. The letters “GND” are also
displayed in this mode.
NOTE: An optional remote
“air/ground” switch may be installed
on the aircraft’s landing gear strut to
keep the KT 70 and KT 71 in the GND
mode until the airplane is airborne.
This feature eliminates the need to
activate the unit’s ON or ALT modes
after takeoff.
ON - The KT 70 is able to reply to all
valid Mode A, C and S interrogations
(Mode A and C on the KT 71).
However, the altitude information will
not be transmitted. In the ON mode,
the altitude window is left blank, the
ID code is shown on the right and the
“ON” annunciation is shown on the
display.
ALT - In the “ALTITUDE” mode, the
KT 70 replies to all valid Mode A, C
and S interrogations (Mode A and C
on the KT 71). The ID code is
displayed in the right window and
altitude information (in hundreds of
feet) is shown on the left.
DISPLAY ADJUST MODE – The KT
70’s and 71’s displays feature three
programmable adjustments: dA 1, dA
2 and dA 3. Display Adjust 1 (dA 1) is
used to vary the dim/bright response