HP 8901B Operation And Calibration Manual page 377

Performance Tests
Model 8901B
23. Tune the signal generator up another 3 kHz. The display should read -80
dB
or less.
25
kHz
Filter: Loss at 21.5 kHz Above Lower 6
dB
Comer:
-80
dB
"Narrow" Filter Test-Option Combination
032
and
033
or
032
and
035
24. Perform step 1, then 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 24.3 SPCL to read the
IF
level.
preset the instrument.
25. Slowly tune the frequency of the signal generator up and down until the peak reading is found.
26. On the Modulation Analyzer, key in 24.3 SPCL and 2 4 . 4 SPCL to establish and display the
27. Tune the signal generator down until the first minimum is found. The display should read -2
dB
current
IF
level as a level reference. (The display should read 0
dB.)
or higher (that is, between -2 and 0
dB).
12.5 kHz Filter:
Loss
at First Minimum: -2
dB
28. Tune the signal generator down until the display reads -6.00
dB.
Record the signal generator's
frequency.
12.5
kHz
Filter: Lower 6
dB
Frequency:
kHz
29. Tune the signal generator down 1 . 6 kHz. The display should read -30
dB
or less (that is, more
negative).
12.5 kHz Filter: Loss at 1 . 6 kHz Below Lower 6
dB
Comer:
-30
dB
30. Tune the signal generator down another 3 kHz. The display should read -80
dB
or less.
12.5 kHz Filter: Loss at 4 . 6 kHz Below Lower 6
dB
Corner:
-80
dB
31. Tune the signal generator up until the display reads 0
dB,
then continue on until the display reads
-6.00
dB.
Record the signal generator's frequency.
12.5 kHz Filter: Upper 6
dB
Frequency:
kHz
32. Subtract the reading of step 31 from the reading of step 28. The difference should be between 6.4
and 10.4 kHz.
12.5 kHz Filter: 6
dB
Bandwidth 6.4 10.4 kHz
33. Tune the signal generator up 12 kHz above the frequency recorded in step 28. The display should
read -30
dB
or less.
12.5 kHz Filter: Loss at 12 kHz Above Lower 6
dB
Corner:
-30
dB
34. Tune the signal generator up another 3 kHz. The display should read -80
dB
or less.
12.5 kHz Filter: Loss at 15 kHz Above Lower 6
dB
Comer:
-80
dB
4-36 Performance Test 10
rev.
I
OJUL87