OPERATION MANUAL
NAV-402AP-3
1-2-3
Page 2
Sep 1/04
3.5 BENCH OPERATION
Bench testing dictates the use of direct coaxial
cable connections between the Test Set and
UUT. The Attenuator Dial readout is the RF
level in dBm present at the RF OUT Connector
into 50 Ω. To conduct accurate sensitivity
measurements, the loss in dBm of the
connecting coaxial cables must be known.
CAUTION: MOST COM RECEIVER
ANTENNA CONNECTORS ARE
ALSO USED FOR THE COM
TRANSMITTER CONNECTOR.
THE TRANSMITTER SHOULD BE
KEYED ONLY WHEN THE COM
ANTENNA CONNECTOR IS
DISCONNECTED FROM THE
TEST SET RF OUT
CONNECTOR. DAMAGE TO THE
ATTENUATOR AND SIGNAL
GENERATOR SYSTEM MAY
RESULT.
3.6 COUNTER OPERATION
With the TONE SELECT Switch in the CTR IN
position, the Test Set Counter may be utilized
as a general utility Counter. Frequencies from
1 to 300 MHz can be measured. The Counter
Mode Switch can be used in any of the four
time base positions: Hz, kHz, KHz or MHz.
3.7 BATTERY PARAMETERS
The battery permits completely portable ramp
operation for up to two hours.
In battery operation, an automatic timer turns
the Test Set OFF after 6 to 10 minutes. The
Test Set can be recycled by pressing the
PWR/BAT Switch to the BAT position.
With the MONITOR METER FUNCTION switch
in the BAT position, the MONITOR meter 0 to
30% scale displays battery voltage. Normal
battery charged condition is indicated as ≥15 V
or greater. Battery voltage <12.5 V indicates a
discharged battery. An automatic low voltage
cutoff circuit turns the Test Set OFF when the
battery voltage drops under 12.5 V.
NOTE: If the Test Set is used only for bench
operation, the battery can lose
storage ability. The Test Set should
be periodically operated on battery
power to allow the battery to partially
discharge.
3.8 OPERATE LOC AND G/S
SIMULTANEOUSLY
To operate the LOC and G/S outputs
simultaneously:
O Adjust all controls for normal G/S operation
(G/S FIXED mode, only). The Output
Attenuator varies the RF level of the G/S
signal, and G/S DDM controls vary the DDM
of the G/S signal.
O Select LOC with the AVG/PEAK LOC XMTR
ON Switch to activate a separate Localizer
generator in the Test Set. This generator
output is combined with the G/S output at
the RF Output Connector at the fixed level
of -18 dBm (approx.). LOC DDM Controls
vary the DDM of the Localizer signal.
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals