Tektronix TDS7054, Руководство по обслуживанию

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Performance Tests
TDS7104 & TDS7054 Service Manual
4- 71
H
Adjust the Trigger LEVEL knob so that there is a stable trigger.
CHECK that the trigger is stable for the test waveform on the
positive slope.
H
Press the Trigger SLOPE button to select the negative slope. Adjust
the Trigger
LEVEL
knob so that there is a stable trigger.
H
CHECK that the trigger is stable for the test waveform on the
negative slope.
H
Enter pass/fail result for trigger on the test record.
H
Leave the trigger system triggered on the positive slope of the
waveform before continuing to the next step.
Check if stable trigger.
Figure 4- 32: Measurement of trigger sensitivity - 50 MHz results shown
c. Check Delayed trigger system for stable triggering at limits: Do the
following subparts in the order listed.
H
From the button bar touch Trig , select the A Event tab, and set the
Source to Line.
H
Select the A-->B Seq tab, and touch the A then B Trig After Time
button.
H
Select the B Event tab, and touch the Set 50% button.
CHECK that a stable trigger is obtained for the test waveform for
both the positive and negative slopes of the waveform. Use the
TRIGGER
LEVEL knob to stabilize the Main trigger. Touch B Trig
Level
and use the keypad or the multipurpose knob/FINE button to