Performance Verification
Check DC B alance
This test check
s the DC balance. You do not need to connect any equipment (other
than a 50Ω terminator) to the oscilloscope to perform this check.
1. Attach a 50 Ω te
rminator to the oscilloscope channel 1 input.
2. Push the front-panel Default Setup button.
3. Set the input impedance to 50 Ω as follows:
a. Push the channel 1 button.
b. Set the Termination (input impedance) to 50 Ω.
4. Setthebandwidthto20MHz:
a. Push the l
ower-bezel Bandwidth button.
b. Push the side-bezel button for 20 MHz.
5. Set the Horizontal Scale to 1msper division.
6. Set the Acquisition mode to Av erage as follows:
a. Push the front-panel Acquire button.
b. Push the Average side bezel button.
c. Ensur
e that the number of averages is 16.
7. Set the trigger source to AC line as follows:
a. Push the Trigger Menu front-panel button.
b. Select the AC Line trigger source with the Multipurpose a knob.
8. Set the Vertical Scale to 1mVper division.
9. Select the mean measurement (if not already selected) as follows:
a. Pu
sh the front-panel Wave Inspector Measure button.
b. Push the Add Measurement lower bezel button.
c. Use the Multipurpose b knob to select the Mean measurement.
d. Push the OK Add Measurement side-bezel button.
e. View the Mean
measurement value in the display.
10. Enter the mean value as the test result in the test record.
11. Repeat steps 8 through 10 for each vertical scale setting in the test record.
12. Push the channel 1 button and then repeat steps 4 thorough 11 for each
bandwidth setting.
MSO4000B and DPO4000B Series Specifications and Performance Verification 57
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