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ADJUSTMENTS
MODEL
8559A
ADJUSTMENTS
5
-
19.
LOG AMPLIFIER LOG AND LINEAR ADJUSTMENTS
(Cont'd)
TABLE
5-6.
LOG FIDELITY CHECK
Test
Limits
(mV)
Step
Attenuator
Setting
(dB)
Theoretical
Reading
(mV)
Theoretical
Reading Subtracted
from Corrected
DVM Reading
(mV)
DVM
Reading
(mV)
*
DVM reading minus offset recorded in step
4.
'*All values in the Difference Between Adjacent Readings column must be less than or equal to
f
10 mV.
Corrected
DVM
Reading*
(mV)
Difference
Between
Adjacent
Readings*
"
(mv)
Example
(
+
5
mV
offset):
**All values in the Difference Between Adjacent Readings column must be less than or equal to
*
10 mV.
TABLE 5-7.
SAMPLE COMPUTATIONS OF AMPLITUDE LOG DISPLAY ACCURACY
Difference
Between
Adjacent
Readings*
"
(mV)
Theoretical
Reading Subtracted
from Corrected
DVM Reading
(mV)
0
+3
-
6
-
8
+
1
*
DVM Reading minus offset recorded in step
4.
Theoretical
Reading
(mV)
+800
+700
+600
+SO0
+400
Corrected
DVM
Reading*
(m V)
+800
+703
+594
+492
+401
Step
Attenuator
Setting
(dB)
0
10
20
30
40
DVM
Reading
(mv)
+805
+708
+599
+497
+406