Performance Ver
ification
Check Delta Time Measurement Accuracy
This test checks the Delta time measurement accuracy (DTA) for a given instrument setting and input signal.
1. Set the sine wave generator output impedance to 50 .
2. Push the o scilloscope front-panel Default Setup button, and then push Menu Off.
3. Connect a 50 coaxial cable from the signal source to the oscilloscope channel being tested.
4. Push the channel 1 button to display the channel 1 menu.
5. Push Termination on the lower menu to set the channel to 50 Ω.
6. Push the Trigger Menu button on the front panel, and then, if necessary, set the trigger source to the channel being tested:
a. Push Source on the lower menu.
b. Use the Multipurpose a knob to select the channel being tested.
7. On the front panel, push the Measure button on the Wave Inspector, and then push Add Measurement on the lower
menu.
8. Use Multip urp ose Kno b “b” to select the Burst Width measurement, and then push OK Add Measurement on the
side me
nu. Use Multip urpose Knob “a” to select the input channel to be tested.
9. Push M
ore on the lower menu to select Statistics and, if necessary, use Multipurpose Knob “a” to set the Mean &
Std Dev Samples to 100, as shown in the side menu.
10. Push Menu Off on the front panel to remove the Statistics menu.
11. Refer to the Test Record Delta Time Measurement Accuracy table. (See page 57, Delta Time Measurement Accuracy
Tests (MDO310X models).) Set the oscilloscope and the signal source as directed there.
12. Push More on the lower menu to select Statistics, and then push Reset Statistics. Wait five or 10 seconds for the
osci
lloscope to acquire all the samples before taking the reading.
13. Ver
ify that the Std Dev is less than the upper limit shown for each setting, and note the reading in the Test R ecord.
14. Rep
eat steps 11 through 13 for each setting combination shown in the Test Record for the channel being tested.
15. Pus
h the channel button on the front panel for the current channel to shut off the channel. Push the channel button for
the next channel to be tested, and move the coaxial cable to the appropriate input on the oscilloscope. Only the channel
being tested should be enabled
16. Repeat steps 5 through 15 until all channels have been tested.
MDO3000 Series S pecifications and Performance Verification 87
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