5520A
Operators Manual
8-82
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.
Note
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.
gl035i.eps
Each option in the Wavegen menu is described below.
• OUTPUT @ SCOPE Indicates the location of the signal output. If the signal does
not appear on the oscilloscope, press O. To disconnect the signal, press Y.
• 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 50Ω and
1 MΩ.
• OFFSET Displays the offset of the generated wave. To change the offset, key in the
new value, and press E. Using the rotary knob does not change the offset; 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 p-p value. Specifically, the maximum
peak excursion equals the offset plus half of the wave’s p-p 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.
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