BendixKing CNI 5000 - Manual (Page 13)

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The CNI 5000 has two identical
Modes S Transponders. A special interna-
tional version of the CNI 5000 is available
with standard ATCRBS transponders.
Operating instructions are the same for
both, except that only one transponder can
be active at a time. Therefore, a “XPDR
1/XPDR 2” switch is provided to select one
transponder or the other for active opera-
tion. See Page 13 for 1/2 Switch operation.
FRONT PANEL OPERATION
IDENT- Press the “IDT” push button when
asked by ATC to “squawk Ident” or “Ident.”
During this period, the reply light “R” will
annunciate for approximately 18 seconds..
Note: An optional External Ident switch
may be installed that performs the same
function.
ID Code- The 4096 Transponder
Identification code (squawk code) for the
aircraft is displayed in the right hand posi-
tion of the display, the Ident window. There
are four code selector knobs, each knob
selects a separate digit of the 4096 code.
Reply- The reply indicator, “R”, is illuminat-
ed for 750 msec ± 100 msec when the
transponder is replying to a valid interroga-
tion, and for 18 seconds after the initiation
of an “Ident.”
Altitude Display- The CNI 5000 displays
Flight Level altitude on the left side of the
display. The display is in hundreds of feet.
“FL” is annunciated to indicate Flight Level
altitude. Flight Level is a term used to indi-
cate that the altitude is not true altitude, but
barometric altitude which is not corrected
for local pressure. For example, “FL 040”
corresponds to an altitude of 4000 feet,
meaning sea level pressure of 29.92 inches
of mercury.
The Flight Level altitude is only dis-
played when the altitude reporting is
enabled, Altitude and Ground mode The
altitude range is -1000 to 99900 feet. If an
invalid code from the altimeter is detected,
dashes will appear in the altitude window.
Altitude reporting will be disabled if the win-
dow is blank or has dashes.
VFR- Momentarily depressing the Function
Selector Knob causes the preprogrammed
VFR code to supersede whatever code
was previously entered. The ID code will
immediately be accepted for interrogation
reply sequence.
The VFR code is programmed by the fol-
lowing sequence:
1. Place the unit in Standby (SBY).
2. Select the desired VFR code.
3. Depress the “VFR” pushbutton (Function
Select Knob) while holding the “IDT”
button in its depressed position.
If the VFR pushbutton (Function Selector
Knob) is inadvertently pressed, the previ-
ous non-programmed 4096 code may be
retrieved by pressing the VFR pushbutton
again for 3 seconds.
Operating Instructions - XPDR
FL
XPDR 1
PUSH
VFR
SBY
OFF
GND
TST ON
ALT
Flight Level—
indicates altitude.
Display is in 100 ft.
increments and is
referenced to
29.92 in. Hg. Transponder Code
selector knobs Function Selector
(Push for VFR code)
Ident
button Photocell for
automatic
dimming ALT/ON/GND/SBY
mode annunciation Reply
indicator Transponder
code readout
IDT