Performance Tests
4-46
TDS 420A, TDS 430A & TDS 460A Service Manual
NOTE. Refer to the Sine Wave Generator Leveling Procedure on page 4--55 if
your sine wave generator does not have automatic output amplitude leveling.
2. Confirm the Trigger input:
a. Display the test signal:
H Set the generator for a 10 MHz, four division signal.
b. Check the Main trigger system for stable triggering at limits:
H Read the following definition: A stable trigger is one that is
consistent; that is, one that results in a uniform, regular display
triggered on the selected slope (positive or negative). This display
should not have its trigger point switching between opposite slopes,
nor should it “roll” across the screen (see Figure 4--16).
Set a signal with a four
division amplitude and a
10 MHz frequency.
Check for a stable trigger
at both the positive and
negative slope settings.
1
2
Figure 4- 16: Confirming Auxiliary Triggering at Maximum Triggering Frequency
3. Disconnect the hookup: Disconnect the cable from the generator output at
the input connector of the channel last tested.
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