Performance Verification
17. Set the DC Volta
ge Source to V
positive
. (See Table 13.) Push Statistics in the
lower-bezel menu and Reset Statistics in the side-bezel menu. Enter the
meanreadinginthefollowingtableasV
positive-measured
.
Table 13: Gain Expected worksheet
Oscilloscope
Vertical Scale
Setting V
diffExpected
V
negative
V
positive
V
negative-measured
V
positive-measured
V
diff
Test
Result
(Gain
Accuracy)
1 m V/div
9 mV -4.5 mV +4.5 mV
2 m V/div
18 mV -9 mV +9 mV
4.98 mV 44.82 mV -22.41 mV +22.41 mV
5 mV 45 mV -22.5 mV +22.5 mV
10 mV 90 mV -45 m V +45 mV
20 mV 180 mV -90 mV +90 mV
49.8 mV 448.2 mV -224.1 mV +224.1 mV
50 mV 450 mV -225 mV +225 mV
100 mV 900 mV -450 mV +450 mV
200 mV 1800 mV -900 mV +900 mV
500 mV 4900 mV -2450 mV +2450 mV
1.0 V 9000 mV -4500 mV +4500 mV
18. Calculate V
diff
as follows:
V
diff
=|V
negative-measured
- V
positive-measured
|
Ente
r V
diff
as shown in the table. (See Table 13.)
19. Calculate GainAccuracy as follows:
GainAccuracy =((V
diff
- V
diffExpected
)/ V
diffExpected
) ≥ 100%
Write down GainAccuracy in a table and in the test record. (See Table 13.)
20. Repeat steps 15 through 19 for each volts/division value in the test record.
21. Change the oscilloscope impedance to 1 MΩ and repeat steps 15 through 20.
2
2.
R
epeat steps 3 through 21 for each channel of the oscilloscope that you want
to check.
42 MSO4000 and DPO4000 Series Specifications and Performance Verification