OPERATION MANUAL
NAV-402AP-3
1-2-3
Page 5
Sep 1/04
3.11 LOCALIZER OPERATION
(TYPICAL CONTROL SETTINGS)
STEP PROCEDURE
1. MONITOR METER FUNCTION Switch
RF to verify proper leveling of internal
Signal Generator on the MONITOR
Meter.
30% to verify or set 20% modulation of
each modulating tone and set course
centering on the MONITOR Meter.
2. COUNTER MODE Switch
GEN to read out the Signal Generator
frequency on the DIGITAL Display when
operating in fixed (FIXED) or variable
(VAR) modes.
3. FREQUENCY MODE Switch
LOC FIXED is mandatory in ramp
operation and is used on bench for a
fixed channel center frequency.
LOC VAR to check all channel bench
operation. Set VAR FREQ Controls to
select the desired channel in
25 kHz steps.
4. TUNE Control
Adjust until TUNE Indicator stops
illuminating, indicating Signal Generator
is in the fine tune range.
5. FINE TUNE switch
Press and adjust TUNE Control until
MONITOR Meter indicates least
deflection from left.
6. OUTPUT ATTENUATOR Control
Use as needed to establish Receiver
sensitivities.
7. RF OUT Connector
Connect to Receiver Antenna Connector,
or attach Antenna in ramp operation.
8. TONE SELECT Switch
Select audio tone: 1020 (Ident tone),
400, 1300 or 3000 Hz as desired.
STEP PROCEDURE
9. LOC DDM Control
Use steps for precise amounts of
deflection and flag tests.
10. LOC DDM/DDM SWEEP AMPLITUDE
Control
Use to check Auto-pilot Servos, meter
stickiness, etc. or to set DDM sweep
amplitude.
11. LOC DDM SWEEP Switch
Use to select initial direction of DDM
sweep.
12. MASTER MOD LEVEL Control
Set to CAL for 20% each course tone and
30% audio tone or variable from 3% to
35% each course tone and 3% to 55%
audio tone.
13. PWR/BAT Switch
PWR to use external ac line power
through the AC IN Connector.
BAT to initiate operation using internal
Battery power.
