Model
8901B
Performance Tests
0
0
0
0
INPUT
000000
O
noon
0
-
FW4
OD
:
EBB
0
OUTPUT
0
0
0
0
0
0
0
0 0
000000
0
0000
0
AUD
IO
INPUT
I
AUDIO SYNTHESIZER
OUTPUT
Figure
4-4.
Audio Filters Performance Test Setup
Lower
1.
Connect the equipment
as
shown in Figure
4-4.
2.
On the AMFM test source, set the
test
mode
to
FM.
3.
Set the audio synthesizer
to
200
Hz
at
+6
dBm.
4.
On the Modulation Analyzer, press the blue key then press INSTR PRESET (the AUTOMATIC
OPERATION key)
to
preset the instrument. Press FREQ and TRACK MODE. The the AM/FM
test
source’s carrier frequency
to
approximately
100
MHz. Press TRACK MODE again
to
turn
it
off.
5.
On the Modulation Analyzer, press MHz
to
center the instrument’s tuning. Set the other controls
as
follows:
Actual Upper
Measurement
.................................................................
FM
Detector.
....................................................................
AVG
6.
Set the audio synthesizer level
to
give a display of approximately
25
kHz average deviation.
7.
Set the audio synthesizer frequency
to
the frequencies shown in the following table. For each
setting, set RATIO on the Modulation Analyzer
to
off,
set all HP or LP FILTERS
to
off,
then set
RATIO
to
on (with LOG/LIN set for
a
linear display),
and
insert the filter indicated. For each
setting, the Modulation Analyzer’s display should read between the limits indicated in the table.
Audio
Synthesizer
Frequency
(Ht)
200
2
000
1 000
10
000
1
000
100
10
000
1
000
10
000
1
000
50
Hz HP FILTER
50
Hz HP FILTER
300
Hz
HP FILTER
300
Hz HP FILTER
3
kHz LP FILTER
3
kHz LP FILTER
15 kHz LP FILTER
15 kHz LP FILTER
>20
kHz LP FILTER
>20
kHz LP FILTER
98.99
98.99
98.99
98.99
98.99
98.99
98.99
98.99
98.99
98.99
101.01
101 -01
101.01
101.01
101.01
101.01
101.01
101.01
101.01
101.01
I
I
I
Performance Test
4
4-19
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