HP 8901B Operation And Calibration Manual page 385

Model 8901B Performance Tests
Special
Function
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 49.C SPCL (C is yellow shift key and digit 2) to select and display the output of the
preset the instrument.
IF rms detector and to inhibit IF' 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.
Limit!
Displayed
Level Lower
IF
RMS
Detector Linearity:
IF Gain Accuracy
5. On the Modulation Analyzer, key in 0.390 SPCL, 0.3 S (Shift) 4 S 4 SPCL, and 0.3 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 49.C SPCL. Multiply the displayed
result by the result of step 4. The computed result should be between 0.944 and 1.059 (that is,
10.5
d B ) .
to set the
IF
gain to 0
dB.
Key in 49.C SPCL.
Decrease in
Signal Generator
Level (dB)
0.3 S 4 S 3
0.3 S 4 S 1
0.3 S 4 7
0.3 S 4 S 4, 0.391
0.392
0.394
0.944
0.944
0.944
0.944
0.944
0.944
-
S
of Computed Result
1.059
1.059
1.059
1.059
1.059
1.059
rev.02FEB88
Performance Test
11
4-40.1