Performance verification Test
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Copyright © Qingdao Hantek Electronics Co., LTD DPO7000 Performance Verification Guide
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4.2.3 Test Procedure
1. Connect the active signal probe of Fluke5000 to the CH1 channel of the
oscilloscope, as shown in the above figure.
2. Set the impedance of Fluke5000 to 1 M Ω.
3. Output a DC signal with a voltage V1 of+3mVDC through Fluke5000.
4. Configure oscilloscope:
⚫ Open the CH1 channel on the oscilloscope interface.
⚫ Click on the Attenuation menu and set the probe attenuation ratio to 1X, with
a default value of 1X.
⚫ Set the vertical gear to 1mV/div.
⚫ Set the horizontal time base to 1 μs/div。
⚫ Set the vertical offset to 0.
5. Click on [Acquire] -> Acquisition -> Average, and then click on the Averages
menu button to set the average frequency to 32.
6. Adjust the trigger level to prevent the signal from being mistakenly triggered.
7. Click on [Meas], select the data source as CH1, select the measurement item as
the average value, and set the read average value to Vavg1.
8. Adjust Fluke5000 to output a DC signal with a voltage V2 of -3mVDC.
9. Turn on the average measurement function, read and record Vavg2.
10. Calculate the relative error of the vertical gear: | (Vavg1- Vavg2) - (V1- V2) |/full
scale × 100%。
11. Keep the other settings of the oscilloscope unchanged:
12. Set the vertical gears to 500uV/div, 2 mV/div, 5 mV/div, 10 mV/div, 20 mV/div, 50
mV/div, 100 mV/div, 200 mV/div, 500 mV/div, 1 V/div, 2 V/div, 5 V/div, and 10 V/div.
13. Adjust the output voltage of Fluke5000 to 3 times and -3 times the current vertical
gear in sequence.
14. Repeat steps 3 to 7 above and record the test results.
15. Calculate the relative error of each vertical gear: | (Vavg1- Vavg2) - (V1- V2) |/full
scale × 100%。
16. Close CH1. Test the relative errors of CH2, CH3, and CH4 gears in sequence
using the above method and record the test results.
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