MAINTENANCE
PERFORMANCE TESTS
REQUIREMENT
The Generator’s measured and programmed
frequencies agree
within
± one count.
TEST EQUIPMENT
Frequency Counter
REMARKS
Failing this test indicates the
need
to repair and/or
recalibrate
the Synthesizer A2A1
assembly.
PROCEDURE
a.
Connect
the UUT 10 MHz
OUT
to the Frequency Counter 10-MHz reference
input, and connect
the
UUT RF OUTPUT to the Counter
input.
b.
Set
the
UUT
REF
INT/EXT
Switch
to INT.
c. Program the UUT to [RCL]
[9][8].
d. Program the UUT frequency
to 111,1111 MHz,
e.
Program
the UUT frequency step
to 111.1111 MHz.
f. As the frequency
is stepped from
111,1111
MHz, 222.2222 MHz,
etc., to
999.9999 MHz, verify that the
Counter reading agrees
with
the UUT frequency
± one count.
4A-5. HIGH-LEVEL ACCURACY
TEST
The output power is measured with
a power meter at various
frequencies,
first with the
step attenuator set for
zero
attenuation, then with
each
attenuator section individually
programmed,
the output level accuracy and
attenuator section errors
are computed.
REQUIREMENT
The output
level
accuracy, the attenuator
section
errors, and the sum of the attenuator
section errors at each test
frequency
are less than ±
1.0
dB, frequency > 0.4MHz.
TEST EQUIPMENT
Power Meter with a Sensor
REMARKS
Failing this
performance
test indicates the need
to replace
the Output (A2A4) and
/
or the
Attenuator/ RPP A2A5
assemblies. To determine which
assembly
is at fault, use Section
4D in this manual for Troubleshooting
procedures.
The test
frequencies
of this procedure provide
reasonable
confidence of the amplitude
accuracy of the UUT. However, additional
test frequencies may
be
included in this test.
4A-4
To Next Page
Loading...
