Instructions

This test checks the sample rate and delay time accuracy (time base).
1. Set up the oscilloscope using the following table:
Push menu button Select menu option Select setting
Default setup - -
Channel 1 Probe 1X
2. Connect the oscilloscope to the time mark generator as shown in the following figure:
3. Set the time mark generator period to 10 ms.
4. Set the oscilloscope Vertical Scale (volts/division) to 500 mV/div.
5. Set the oscilloscope Main Horizontal Scale (seconds/division) to 1 ms/div.
6. Push the Trigger Level knob to activate the Set To 50% feature.
7. Use the Vertical Position control to center the test signal on screen.
8. Use the Horizontal Position control to set the position to 10.00 ms.
9. Set the oscilloscope Horizontal Scale (seconds/division) to 200 ns/div.
10. Check that the rising edge of the marker crosses the center horizontal graticule line within ±2 divisions of the vertical
center graticule line, as shown in the following figure:
Note: One division of displacement from graticule center corresponds to a 25 ppm time base error.
11. Disconnect the test setup.
Check edge trigger sensitivity
This test checks the edge trigger sensitivity for all input channels.
Performance verification
TBS1000 Series Oscilloscopes Series Digital Storage Oscilloscope Technical Reference 17