Performance Verification
10. Use the Multipu
rpose a knob to select the High measurement.
11. Push the OK Add Measurement side bezel button.
12. Record the high and low measurements (for example, low = 200 mV and
high = 3.52 V).
13. Repeat the p rocedure, using 50 Ω instead of 1 MΩ in step 4.
Check Random Noise,
Sample Acquisition Mode
This test checks random noise. You do not need to connect any test equipment to
the oscilloscope for this test.
1. Disconnect everything connected to the oscilloscope inputs.
2. Push the front-panel Default Setup button to set the instrument to the factory
default settings. This sets the oscilloscope to Channel 1, Full Bandwidth,
1MΩ input impedance, 100 mV/div, and 4.00 μs/div.
3. Set Gating to Off:
a. Push the front-panel Wave Inspector Measure button.
b. Push the bottom-bezel More buttontoselectGating.
c. Push the side-bezel Off (Full Record) button.
4. Select the RMS measurement:
a. Push the bottom-bezel Add Measurement button.
b. Use t he Multipurpose a knob to select the RMS measurement.
c. If necessary, use the Multipurpose b knob to select the channel being
tested as the source for the RMS measurement.
d. Push the side-bezel OK Add Measurement button.
5. Push the bottom-bezel More button to select Statistics, and then push the
side-bezel Reset Statistics button.
6. Push the front-panel Menu Off button to remove the menus from the display.
7. Read the RMS Mean value. This is the Sampled Mean Value (SMV).
8. Push the Horizontal Acquire button and then, if necessary, push the
bottom-bezel Mode button to display the Acquisition Mode menu.
9. Push the side-bezel Average button and, if necessary, use the multipurpos
e a
knob to set the number of averages to 16.
10. Push the front-panel Wave Inspector Measure button and then, if necessary,
push the bottom-bezel More button to select Statistics, and then push the
side-bezel Reset Statistics button.
11. Push the front-panel Menu Off
button to remove the menus from the display.
12. Read the RMS Mean value. This is the Averaged Mean Value (AMV).
46 MSO4000 and DPO4000 Series Specifications and Performance Verification
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