4. Configure the oscilloscope:
a. To enable CH1, perform any of the following operations:
- Click or tap the channel status label at the bottom of the screen to enable
CH1.
- Press the front-panel key to enable the channel.
- In the Vertical menu, select the CH1 tab. Select ON for the Display item to
turn CH1 on.
b. Click or tap the channel status label at the bottom of the screen. Then the
Vertical menu is displayed. Click or tap Probe to enter the Probe setting menu.
Set the probe attenuation ratio to "1X".
c. Set the vertical scale to 1 mV/div.
d. Set the horizontal time base to 1 μs/div.
e. Set the vertical offset to 0.
f. In the
Horizontal menu, select "Average" for the Acquisition item. Then click or
tap the input field of Averages to set the number of averages to 32 with the
pop-up numeric keypad.
g. Adjust the trigger level to prevent the signals from being triggered by mistake.
5. In the
Measure menu, click or tap Vertical measurement item to select "Vavg". The
Vavg result is displayed in the "Result" sidebar at the right side of the screen. Read
and record the measurement result of Vavg1.
6. Adjust Fluke 9500B to make it output a DC signal with -3 mVdc voltage (Vout2).
7. Enable the average measurement function. Read and record Vavg2.
8. Calculate the relative error of this vertical scale: |(V
avg
1 - V
avg
2) - (V
out
1 - V
out
2)| /
Fill Scale x 100%.
9. Keep the other settings of the oscilloscope unchanged.
a. Set the vertical scale to 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.
b. Adjust the output voltage of Fluke 9500B to 3 x the current vertical scale and -3
x the current vertical scale respectively.
c. Repeat Step 3-7 and record the test results.
Performance Verification Test
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DHO1000 Performance Verification
17
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