HP 8901B Operation And Calibration Manual page 383

Model 8901B
Performance Tests
Actual
2 . On the Modulation Analyzer, key in the following:
a. Press the blue key then press INSTR PRESET (the AUTOMATIC OPERATION key) to
b. Key in 100 MHz
to
inhibit automatic tuning.
c. Key in 24.0 SPCL to initialize the high-selectivity level measurement.
d. Key in 3 . 1 SPCL to remove the
RF
input high-pass filter.
e. Key in 24.1 SPCL to read the IF level.
f. Key in 50.6 SPCL to select and display the output of the
IF
rms detector and to inhibit
IF
preset the instrument.
ranging.
3. Adjust the level of the signal generator for a displayed reading of 2.500.
4.
Decrease the signal generator level by exactly 5
dB.
Divide the displayed reading by 1.406 and
record the result.
Upper
1.059
1.059
1.059
1.059
1.059
1.059
1.059
IF
RMS Detector Linearity:
I F
Gain Accuracy
5. On the Modulation Analyzer, key in 0.250 SPCL, 0 . 2
S
(Shift) 4 S 4 SPCL, and 0.2 S 30 SPCL
6. Increase the signal generator level for a displayed reading of 1.000.
7 . Decrease the signal generator level by the exact amount indicated in the following table. For each
setting, key in the Special h c t i o n ( s ) indicated, then key in 50.6 SPCL. Multiply the displayed
result by the result of step 4. The computed result should be between 0.944 and 1.059 (that is,
k0.5
dB).
to set the IF gain to 0
d B .
Key in
50.6
SPCL.
Decrease in
Signal Generator
Level (dB1
Special
Function
0.2
s
4
s
3
0.2
s
4
s
1
0.2
s
4
7
0.2 S
4
S 4, 0.251
0.252
0.254
0.250, 0.2 S 31
- -
Displayed
Level
Limits
Lower
0.944
0.944
0.944
0.944
0.944
0.944
0.944
of Computed Result
I
rev.1 OJUL87
Performance Test 1 1
4-39