HP 8901B Operation And Calibration Manual page 365

Model 8901B Performance Tests
POWER REFERENCE
Power Output
Power Output Accuracy
Performance Test 6
1 mW
3 t l . 2 7 0
worst case: for
1
year: 0 to
55OC
POWER REFERENCE TEST (USING REFERENCE COMPARISON)
Specification
Characteristic
I
Performance Limits
1
Conditions
Description
The power from an external 1 mW power reference is measured with a power sensor and the power
meter of the Modulation Analyzer. The same power meter and sensor are then used
to
measure the
power from the Modulation Analyzer's power reference.
NOTE
Due
to accuracy limitations of this test method, the power level can only
be verified to within
&1.9%.
Greater accuracy can be obtained by using a
recently calibrated external power reference or by following the procedure in
Performance Test 7-Power Reference Accuracy
( U s i n g
DC Substitution).
Equipment
Power Reference
..........................................................
HP 435A Opt KO5
Sensor Module
..................................................................
H P 11722A
Procedure
1. Connect the input of the sensor module (or a compatible power sensor connected to the
2. On the Modulation Analyzer, press RF POWER. Press RATIO and check that LOG/LIN is in
3. Connect the power sensor/input switch to the CALIBRATION RF POWER OUTPUT connector
Modulation Analyzer's SENSOR input) to the output of the external power reference.
the linear mode. (The display should read between 99.9 and 100.1% REL.)
of the Modulation Analyzer. The display should read 98.1 and 101.9% REL.
RF Power Reference Accuracy: 98.1 101.9% REL
Performance Test 6 4-25