Performance Verification and Adjustments
1
Keysight 8990B Service Guide
41
12
Calculate the V
error+
and V
error–
respectively using the following equation and
record the value in
V
error
= V
DMM
– V
scope
13
Repeat
for the rest of the vertical scale setting in
14
Repeat
with the input impedance set to 1 M
Ω.
15
Repeat
Table 1-4
Test record for offset accuracy verification
Vertical scale
(V/div)
Output
voltage
V
DMM+
V
scope+
V
error+
V
DMM–
V
scope–
V
error–
V
zero-error
V
zero-error
limit (
±
)
Video input channel 2 (50
Ω
)
0.01
±
120 mV
1.8 mV
0.02
±
240 mV
2.6 mV
0.05
±
600 mV
5.0 mV
0.1
±
1.2 V
9.0 mV
0.2
±
2.4 V
17.0 mV
0.5
±
4.0 V
41.0 mV
1
±
4.0 V
81.0 mV
Video input channel 2 (1 M
Ω
)
0.01
±
5 V
1.8 mV
0.02
±
10 V
2.6 mV
0.05
±
10 V
5.0 mV
0.1
±
20 V
9.0 mV
0.2
±
20 V
17.0 mV
0.5
±
20 V
41.0 mV
1
±
100 V
81.0 mV
2
±
100 V
161.0 mV
5
±
100 V
401.0 mV
Содержание 8990B
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