BendixKing CNI 5000 - Manual (Page 11)

10
Outside the United States some sta-
tions are unmodulated and use an inter-
rupted carrier for identification purposes.
The BFO mode, activated and annunciated
when the “BFO” button is depressed, per-
mits the carrier wave and the associated
morse code identifier broadcast on the car-
rier wave to be heard.
ADF Test (Pre-Flight or In-Flight).
Select ANT mode. This will cause the
bearing pointer to move directly to the
parked 90° position. Make sure the unit is
tuned to a usable frequency. Now select
ADF mode and the needle should move
without hesitation to the station bearing.
Excessive sluggishness, wavering or rever-
sals indicate a signal that is too weak or a
system malfunction.
Operating the Timers.
The flight timer will always be automati-
cally reset to :00 whenever power is inter-
rupted either by the avionics master switch
or the unit’s ON/OFF switch. An optional
external switch may be installed which,
when activated, will stop or start the flight
timer. This switch would be of use during a
non-refueling stop when resetting the flight
timer is not desired. On some aircraft it may
be desirable to use the aircraft strut switch
instead of a manual switch to stop and start
the flight timer. It should be emphasized
that the start/stop function will only operate
with power applied to the unit. Always read
flight time prior to power shutdown.
Flight time or elapsed time are dis-
played and annunciated alternately by
depressing the FLT/ET button. The flight
timer continues to count up until the unit is
turned off or stopped with an external
switch. The elapsed timer may be reset
back to :00 by pressing the SET/RST but-
ton. It will then start counting up again.
(NOTE: pressing the SET/RST button will
reset the elapsed timer whether it is being
displayed or not).
The elapsed timer also has a “count-
down” mode. To enter the countdown
mode, the SET/RST button is depressed
for about two seconds, or until the “ET”
annunciation begins to flash. It is now in
the ET set mode, and a time up to 59 min-
utes, 59 seconds may be preset into the
elapsed timer with the concentric knobs.
The preset time will be displayed and remain
unchanged until SET/RST is pressed again,
which will start the elapsed timer counting
down from the preset time. When the timer
reaches :00 it will start to count up as the
display flashes for 15 seconds and an aural
alarm, if installed, is activated for about 1
second.
NOTE: The standby frequency which is
in memory while flight time or elapsed time
modes are being displayed may be called
back by pressing the FRQ button, then
transferred to active use by pressing the
FRQ button again.
While FLT or ET is displayed the “in use”
frequency on the left side of the window may
be changed, by using the frequency select
knobs, without any effect on the stored
standby frequency or the other modes. This
feature is especially useful when searching
for stations with unknown frequencies.
ERRONEOUS ADF BEARINGS DUE TO
RADIO FREQUENCY PHENOMENA
Station Overlap.
In the U.S., the FCC, which assigns AM
radio frequencies, occasionally will assign
the same frequency to more that one sta-
tion in an area. Certain conditions, such as
Night Effect, may cause signals from such
stations to overlap. This should be taken
into consideration when using AM broad-
cast stations for navigation.
Sunspots and atmospheric phenomena
may occasionally distort reception so that
signals from two stations on the same fre-
USE STBY/TIMER
FLT
OFF
VOL
ADF
ADF ET/FLT BFO FRQ
ANT
ET
SET RST
USE STBY/TIMER
BFO FLT
OFF
VOL
ADF
ADF ET/FLT BFO FRQ
FRQ
ANT
SET RST
USE STBY/TIMER
BFO
OFF
VOL
ADF
ADF ET/FLT BFO FRQ
FRQ
ANT
ET
SET RST