Agilent Technologies 54830 Series Service Manual page 72

Figure 3-16
Acquisition Setup for Trigger Sensitivity Test
Set horizontal time/div to 5 ns/div.
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Turn on Channel 1 and turn off all other channels.
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You can do this by using the channel keys above each input BNC or by using the check boxes at
the top of the waveform display area.
Set vertical scale for channel 1 to 200 mV/div. Select dc coupling and 50 Ω input
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impedance.
With an N cable and N-to-BNC adapter, connect the signal generator to the channel 1
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input.
Set the signal frequency to 100 MHz and output level for 0.5 divisions of vertical
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deflection.
You can use the markers to set a 0.5 division reference. Select Markers from the Measure menu
and select Manual Placement in the dialog that appears. Both Markers should be set to the same
channel. Set the Y value for Marker A to +50.0 mV and the Y value for Marker B to –50.0 mV,
then click Close. (If the markers do not appear on the screen, press the Marker A and Marker B
keys on the front panel.) See Figure 3-17.
Figure 3-17
Setting the Markers for a 0.5 Division Reference
Press the Sweep key (Trigger section of the front panel controls) to select Trig'd.
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The oscilloscope's Armed and Trig'd LEDs (in the Horizontal section of the front panel) should
flash. However, the waveform display may not be stable.
Chapter 3: Testing Performance
To test trigger sensitivity
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