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Performance Verification Test
5. Calculate the time base accuracy, namely the ratio of ΔT to the horizontal position
of the oscilloscope. For example, if the offset measured is 1 ns, then the time base
accuracy is 1 ns/1 ms = 1 ppm.
6. Calculate the time base accuracy limit by using the following formula: ±(1.5 ppm +
1 ppm/year x Number of Years that the Instrument Has Been Used).
5.7.4
Test Record From
Channel
CH1
NOTE
[1]: Calculation Result = Test Result ΔT/1 ms.
[2]: For the number of years that the instrument has been used, please calculate it according to
the date in the verification certificate provided when the instrument leaves factory.
DHO4000 Performance Verification
34
Calculation
Test Result
ΔT
Result
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
Limit
[1]
±(1.5 ppm + 1 ppm/year
x Number of Years that
the Instrument Has Been
[2]
Used
)
Pass/Fail
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