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
24.4
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
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