13. Compare the rising edge of the marker with the center horizontal graticule
line. The rising edge should be within ±0.8 divisions of center graticule.
Enter the deviation in the test record.
NOTE. A 5 ppm time base error is 400 ns or 0.8 divisions of displacement.
14. Press the Menu Off button.
Check delta time measurement accuracy
This test checks the Delta-time measurement accuracy for a given instrument
setting and input signal.
1. Connect a 50 Ω coaxial cable from the signal source to the oscilloscope
channel 1, as shown in the following illustration.
WARNING.
The generator is capable of providing dangerous voltages. Be
sure to set the generator to off or 0 volts before connecting, disconnecting,
and/or moving the test hookup during the performance of this procedure.
2.
Push the oscilloscope front-panel Default Setup button.
3. Set the Horizontal Scaleto one of the unchecked values listed in the test
record. For example, set the scale to 4 ns/divas follows:
a. Turn the Horizontal Scale knob to set the time per division as close as
you can to the desired setting. In this case, set the scale to 5 ns/div.
b. Push the front-panel Acquire button.
c. Select Manual Mode.
d. Click the Sample Rate field and set the sample rate to one of the
unchecked values listed in the test record.
e. Click the Record Length field to bring up the on screen keypad.
f. Reduce the record length until the correct Horizontal Scale is set.
Performance verification (MSO/DPO5000/B series)
332 MSO70000C/DX, DPO70000C/DX, DPO7000C, MSO5000/B, DPO5000/B Series
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