HP 8901B Operation And Calibration Manual page 359

Model
8901B
Performance Tests
0 0
0
0
INPUT
000000
O
noon
0
-
F W 4
O D
:
E B B
0
OUTPUT
0
0 0 0 0 0
0
0 0
0 0 0 0 0 0 0
0000
0
AUD I O
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 A M F M 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. T h e 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 H P 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 ( H t )
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