Testing The Trigger - Fluke 5500A Operator's Manual

5500A
Operator Manual

8-109. Testing the Trigger

The oscilloscope's ability to trigger on different waveforms can be tested using the wave
generator. When the wave generator is used, a square, sine, or triangle wave is
transmitted and the wave's output impedance, offset, and voltage can be varied in order
to test the triggering capability at different levels.
The wave generator should not be used for checking the accuracy of your
oscilloscope. The question mark in the Output Display indicates the
amplitude values are not accurate enough to use for checking the
oscilloscope's accuracy.
The wave generator is available through the Wavegen menu, shown below. To access
this menu, press the softkey under MODE until "wavegen" appears.
Each option in the Wavegen menu is described below.
8-82
OUTPUT @ SCOPE Indicates the location of the signal output. If the signal does
not appear on the oscilloscope, press
WAVE Scrolls through the three types of waveforms that are available. You can
select a square, sine, or triangle wave as the output.
SCOPE Z Toggles the calibrator's output impedance setting between 50
1 M .
OFFSET Displays the offset of the generated wave. To change the offset, key in
the new value, and press
it changes the actual voltage output.
When you change the offset, you must remain within certain limits to avoid clipping
the peaks. The limit depends on the wave's peak-to-peak value. Specifically, the
maximum peak excursion equals the offset plus half of the wave's peak-to-peak
value. See "Wave Generator Specifications" at the beginning of this chapter.
MODE Indicates you are in Wavegen mode. Use the softkey to change modes and
open the corresponding menus for the other four oscilloscope calibration modes.
Note
. To disconnect the signal, press
. Using the rotary knob does not change the offset;
gl035i.eps
.
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