Performance Verification
e. Push the bottom
-bezel More button to select Statistics.
f. Use the Multipurpose a knob to set the Mean & Std Dev Samples to
100,asshowni
n the side menu.
6. Set the signal source to 240 MHz and 40 mV as shown in the test record.
NOTE. To pro
vide consistent results, set the signal source frequency such that the
zero crossing does not occur at the beginning or end of the record.
7. Set the Hor
izontal Scale to 4nsper division.
8. Set the Vertical Scale to 5mVper division.
9. Record the Std Dev value as follows:
a. Push the side-bezel Reset Statistics button.
b. Push the Menu Off button to remove the side-bezel menu.
c. Wait five or 10 seconds for the oscilloscope to acquire all of the samples.
d. Verify
that the Std Dev is less than the upper limit shown in the test record.
e. Enter the reading in the test record.
10. Repeat steps 6 through 9 for each setting combination shown in the test record.
11. Repeat the procedure for all remaining channels as follows:
a. Push the front-panel button to deselect the c hannel that you have already
tested.
b. Connect the signal source to the input for the next channel to be tested.
c. Repeat the procedure from step 3 until all channels have been tested.
74 MSO4000B and DPO4000B Series Specifications and Performance Verification
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