q
TEST mode (by pressing the TEST button)
Press the TEST key. All digits should flash on and off in both liquid crys-
tal displays (display test). At the same time, the VOR/LOC pointer (verti-
cal needle) of the connected indicator should deflect fully and the
VOR/LOC warning flag should disappear from view. In the NAV re-
ceiver NR 3320 - (1) the GS pointer (horizontal needle) of the connected
indicator should deflect fully and the GS flag should disappear from
view.
q
VOR mode
1. Set the frequency of the wanted VOR station.
2. To monitor the identification signal, press the
IDT
key (ON appe-
ars briefly in the (right indication) of the LC display). Monitor the
identification signal and compare it with the identification signal of
the wanted VOR station. Adjust the volume using the
VOL
control.
3. If an evaluable VOR signal enables a safe bearing to be establis-
hed, the vertical needle deflects and the VOR/LOC flag disappe-
ars from the field of view.
4. Rotate the omnibearing selector (
OBS
) on the display unit until
the TO/FROM display indicates TO and the vertical needle has
settled in the mid position. The heading indication then indicates
the magnetic course to the VOR station.
5. Course deviations during the approach are indicated in the directi-
on of correction by the vertical needle (course correction in the di-
rection of the needle deflection).
BECKER NR 3320 - ( ) / NR 3330 - ( )
Page 16
Issue 12/97
6. When overflying the VOR station, the TO/FROM display moves
from TO to FROM. If the flight is continued on the same heading,
the course indication shows the magnetic position line of the VOR
station which the aircraft is approaching, with the vertical needle
in the mid position.
q
Monitoring flight and weather information
1. Press the
IDT
key. The word OFF appears briefly in the (right indi-
cation) of the LC display. Identification transmissions are faded
out.
2. The fading out of the VOR/LOC indentification signal means that
flight and weather information can now be monitored.
3. Press the
IDT
key again. The word ON appears briefly in the dis-
play. The identification signal can now be monitored.
q
LOC mode
1. Set the frequency of the required localizer.
2. Switch on the VOR/LOC identification (press the
IDT
key, ON ap-
pears briefly in the display). Monitor the Morse identification signal
and compare it with the identification signal of the wanted locali-
zer.
3. The vertical needle (command needle) deflects during the appro-
ach to the localizer in the direction in which the course is to be
corrected in order to obtain the correct landing course. A mid posi-
tion of the needle means that the aircraft is on the correct line for
landing.
Operating Instructions
Issue 12/97
Page 17
