MAINTENANCE
PERFORMANCE
TESTS
I
It is convenient to use the
OUT
RF
ON/OFF
control when zeroing the power meter
function of the Measuring
Receiver,
PROCEDURE
a. Connect the UUT 10 MHz OUT to the
10
MHz
timebase
input of the Measuring
Receiver.
b. Set the UUT REF INT/EXT
switch to INT.
c. Program the UUT to [RCL]
[9][8],
and then
program the UUT to 0.4 MHz, +1
1
dBm and program the
Amplitude Step to 6 dB.
d. Calibrate the Measuring Receiver and connect
it
to
the
UUT RF OUTPUT,
e. Verify that the level
measured
with the Measuring Receiver agrees with the
UUT
programmed
level to within ±1.0 dB, as the UUT level is stepped down
from
+11
dbm to
-127
dBm in six
dB steps at
each of
the
following frequencies;
0.4 MHz,
120
MHz, 244 MHz,
245 MHz, 850 MHz, and 1050 MHz.
4A-9. OUTPUT LEAKAGE
TEST
The output signal
leakage
is
verified
with a
two-turn
loop by measuring
the
induced signal
with a spectrum
analyzer and comparing it to
a
1
juV
reference established at each
frequency from the
UUT.
REQUIREMENT
The radiated
emissions induce less than
1
juV
of the Generator’s output signal into a
1-
inch diameter,
two-turn loop, 1 inch away
from any surface of the Generator as
measured
into
a 50-ohm receiver.
TEST
EQUIPMENT
Wideband Amplifier
RF Spectrum Analyzer
Two-Turn Loop
Type-N Termination
A screen room may be required depending on the
RF environment.
REMARKS
Failing
this test probably indicates a broken feed-through filter or improper mechanical
assembly, i.e.; loose screws and/or damaged or misplaced gaskets.
PROCEDURE
a. Connect the UUT RF OUTPUT to the Wideband Amplifier input, and connect
the Amplifier output to the Spectrum
Analyzer input. Use well shielded
cables
to
avoid leakage
which could affect the measurement.
b. Program the UUT to the Instrument Preset
State, [RCL]
[9][8].
c. Program the
UUT
to
-107
dBm.
4A-9
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