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:
IF
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 hction(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
dB.
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
11
4-39
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