Performance Verification
4-14
TDS3000B Series Service Manual
This test checks the time base accuracy.
1. Connect the output of the time mark wave generator to the oscilloscope
channel 1 input as shown below.
Time mark
generator
Ch 1
Oscilloscope
2. Push the SAVE/RECALL menu button.
3. Push the Recall Factory Setup screen button and then push the OK
Confirm Factory Init screen button.
4. Push the DELAY buttontoturndelayoff.
5. Push the vertical MENU button.
6. Push the Coupling screen button and select 50 Ω input resistance.
7. Set the time mark generator period to 100 ms. Use a time mark waveform
with a fast rising edge.
8. If adjustable, set the time mark amplitude to approximately 1V
p-p
.
9. Set the vertical SCALE to 500 mV/div.
10. Set the horizontal SCALE to 20 ms/div.
11. Adjust the vertical POSITION control to center the time mark signal on the
screen.
12. Adjust the trigger LEVEL as necessary to obtain a triggered display.
13. Adjust the horizontal POSITION control t o move the trigger location to the
center of the screen (50%).
14. Push the DELAY button to turn delay on.
Check Sample Rate and
Delay Time Accuracy
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