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Performance Tests
4–44
TDS 684A, TDS 744A, & TDS 784A Service Manual
Check long–term sample
rates and delay time
accuracies against limits.
4
Align the trigger T to the
center graticule line.
1
Set
horizontal
mode.
2
Set horizontal scale
and delayed time.
3
Figure 4–12: Measurement of Accuracy — Long-Term and Delay Time
3. Disconnect the hookup: Disconnect the cable from the generator output at
the input connector of CH 1.
Trigger System Checks
These procedures check those characteristics that relate to the Main and Delayed
trigger systems and are listed as checked in Specifications.
Equipment
Required
One medium-frequency leveled sine wave generator (Item 11)
One 10X attenuator (Item 1)
One 50 W, precision coaxial cable (Item 5)
Prerequisites See page 4–15
Check Accuracy (Time) for
Pulse-Glitch or
Pulse-Width Triggering