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 hction(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
dB).
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
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