Model
8901B
Performance Tests
11.
Tune the
signal
generator up
12
kHz above the frequency recorded in step
6.
The display should
read
-30
dB
or less.
12.5
kHz
Filter:
Loss
at
12
kHz Above Lower
6
dB
Comer:
-30
dB
12.
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
“Wide” Filter Test-Option Combination
032
and
033
or
033
and
037
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
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
24.1
SPCL
to
read the
IF
level.
preset the instrument.
Slowly tune the frequency of the signal generator up and down until the peak reading
is
found.
On the Modulation Analyzer, key in
24.1
SPCL and
24.2
SPCL
to
establish and display the
current
IF
level
as
a
level reference. (The display should read
0
dB.)
Tune the signal generator down until the
first
minimum
is
found. The display should read
-2
dB
or higher
(that
is, between
-2
and
0
dB).
25
kHz Filter:
Loss
at
First
Minimum:
-2
dB
Tune the signal generator down until the display reads
-6.00
dB.
Record the signal generator’s
frequency.
25
kHz Filter: Lower
6
dB
Frequency:
kHz
Tune the signal generator down
1.6
kHz.
The display should read
-30
dB
or less
(that
is,
more negative).
25
kHz Filter: Loss at
1.6
kHz
Below Lower
6
dB
Comer:
-30
dB
Tune the signal generator down another
3
kHz. The display should read
-80
dB
or less.
25
kHz
Filter: Loss
at
4.6
kHz Below Lower
6
dB
Comer:
-80
dB
The 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.
25
kHz
Filter: Upper
6
dB
Frequency:
kHz
Subtract the reading of step
20
from the reading of step
17.
The difference should be between
12.4
and
16.9
kHz.
25
kHz Filter:
6
dB
Bandwidth
12.4
16.9
kHz
Tune the signal generator up
18.5
kHz above the frequency recorded in step
17.
The display should
read
-30
dB
or
less.
25
kHz Filter:
Loss
at
18.5
kHz Above Lower
6
dB
Corner:
-30
dB
rev.lOJUL87
Performance Test
10 4-35
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