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Table 10. AC Level Accuracy and Flatness (0.0007 V HIGH INPUT).
Adjustments

Calibration Procedure For Audio Analyzer, Models 8903A And 8903B Page Navigation
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TB 9-6625-160-24
(40) Record calculated value in appropriate column of table 11 and 12 below. Value
calculated in step (39) above must be within limits specified in table 11 below.
(41) Repeat technique of (37) through (40) above for remaining parameters and
limits listed in table 11 below.
Table 11. Output Level accuracy and Flatness.
TI Right
Table
TI Limits Ratio(%)
TI
Source AMPT
display
7 or 10
Frequency
Indicated
Level
Step (38)
%
Min
Max
Special Function
4
(Hz)
Step (40)
(RATIO)
1
1.9
6
20
98
102
1k2
1
98
102
1
20 k
98
102
1
50 k
96
104
1
100 k
97
103
1.14
0.7
100 k
97
103
50 k
98
102
20 k
98
102
1k2
98
102
20
98
102
1.19
0.07
20
98
102
1k2
96
104
20 k
96
104
50 k
98
102
100 k
97
103
0.007
100 k
97
103
50 k
97
103
20 k
97
103
1k2
97
103
20
97
103
0.00073
1.19
20
95
105
1k2
95
105
20 k
95
105
50 k
95
105
100 k
95
105
1
Use the 7 V rms values from step (10) (table 7) above.
2
1000 Hz Recorded REF form table 7.
3 Use the C/R from tables 9 and 10.
4 Key in the Value only then press the RATIO Button, (LED ON).
(42) Calculate source flatness in table 12 below by subtracting 1000Hz recorded REF
-
Difference Limits % = value recorded in step
Hz recorded REF table
from value recorded in step (40) above, as shown below:
(43) Recorded value from step (40) for each Source (V/Hz), when compared to 1000Hz
Recorded REF, must be within Difference Limits specified in table 12.
17


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