Performance Ver
ification
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 Default Setup on the front panel to set the instrument to the factory default settings. This sets the oscilloscope to
Channel 1, Full Bandwidth, 1 M input termination, 100 mV/div, and 4.00 s/div.
3. Set Horizontal to 10 ms/div.
4. Set CH1 Vertical Channel Setting to 50 termination and the desired bandwidth.
5. Set up the measurements to do RMS and Mean measurement of selected channel and record the measurement.
6. Calculate RMS noise voltage = Square root of (RMS
2
– Mean
2
), and record the result.
7. The calculated RMS noise voltage from step 6 should be less than the high limit in the test record (the calculated
maximum RMS noise).
8. Repeat the above test for all other input channels. Channels 3 and 4 are only available on three or four channel
oscilloscopes.
This completes the procedure.
86 MDO3000 Series Specifications and Performance Verification
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