Appendix B: Performance Verification
TDS 340A, TDS 360 & TDS 380 User Manual
B–11
7. Adjust the horizontal POSITION to move the trigger T to the right and on
to the screen. Continue to position the trigger T to align it to the center
vertical graticule line.
8. Press the main menu button Time Base; then press the side menu button
Delayed Only.
9. Set the horizontal SCALE of the D (delayed) time base to 1 ms/div. Then
use the General Purpose knob to set delay time to 10 ms.
10. Set the horizontal SCALE of the D (delayed) time base to 500 ns/div.
NOTE. When you change the SEC/DIV in step 10, the delay time readout
changes to 10.00001 or 9.99999. This is normal and has no effect on the
verification
11. Check that the rising edge of the marker crosses the center horizontal
graticule line at a point within ±2.0 divisions of the graticule center.
NOTE. One division of displacement from the center graticule corresponds to
a 50 ppm time base error.
12. Disconnect the test hookup.
Delta time measurement accuracy is verified by successful completion of the
previous procedure.
Trigger System Checks
These procedures check those characteristics that relate to the trigger system and
are listed as checked under Warranted Characteristics in the Specifications
section.
Equipment Required: One leveled sine wave generator (Item 7 or 8), two
precision 50 W coaxial cables (Item 2), one 50 W termination (Item 1), and one
BNC T connector (Item 4).
Time Required: Approximately 10 minutes.
Prerequisites: See page B–5.
Delta Time Measurement
Accuracy
Check Edge Trigger
Sensitivity, DC Coupled
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