Performance Verification
TDS 200 Series Digital Oscilloscope Service Manual
4–7
9. Set the instrument Window SEC/DIV to 500 ms/div.
NOTE. Setting the Window SEC/DIV to a setting slower than the Main SEC/DIV
setting resets the main timebase. If this happens, reset the Main SEC/DIV and
then the Window SEC/DIV settings.
10. Use the horizontal POSITION control to set the window position to
10.00 ms.
11. Set the instrument Window SEC/DIV to 500 ns/div.
12. Check that the rising edge of the marker crosses the center horizontal
graticule line within ±2 divisions of center graticule.
NOTE. One division of displacement from graticule center corresponds to
a 50 ppm time base error.
13. Disconnect the test setup.
This test checks the edge trigger sensitivity for all input channels.
1. Set up the instrument using the following steps:
Press menu button Select menu item Select setting
SAVE/
RECALL
Recall
Factory
—
CH 1 Probe 1X
TRIGGER Mode Normal
ACQUIRE Sample —
MEASURE
Source An unchecked channel
Type Pk-Pk
Check Edge Trigger
Sensitivity
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