OPERATION MANUAL
NAV-402AP-3
1-2-3
Page 3
Sep 1/04
3.9 MARKER OPERATION
(TYPICAL CONTROL SETTINGS)
STEP PROCEDURE
1. MONITOR METER FUNCTION Switch
RF to verify proper leveling of internal
Signal Generator on the MONITOR
Meter.
100% to verify 95% modulation of Signal
Generator on the MONITOR Meter.
2. FREQUENCY MODE Switch
MKR FIXED is mandatory in ramp
operation and is used on bench for
standard Marker center frequency.
MKR VAR Set VAR FREQ Controls to
select the desired channel in 25 kHz
steps.
3. COUNTER MODE Switch
GEN to read out the Signal Generator
frequency on the DIGITAL Display when
operating in fixed (FIXED) or variable
(VAR) modes.
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 desired tone: 1020 (Ident tone),
400, 1300 or 3000 Hz.
9. MASTER MOD LEVEL Control
Set to CAL for 95% or variable from 3%
to 96%.
STEP PROCEDURE
10. PWR/BAT Switch
PWR to use external ac line power
through the AC IN Connector.
BAT to initiate operation using internal
battery.
