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7 - 14 92B/96B/99B/105B Users Manual
MEASURING PULSE RESPONSE OF AN
AMPLIFIER
In this example you will use cursors to measure the rise
time of a pulse. Rise time is an indication of the bandwidth
limitation of an analog amplifier. First you determine the 0%
and 100% reference points of the waveform to be
measured. These are the intersections of the waveform
and the cursors. This manual determination of the
reference points enables you to ignore unwanted
overshoot, undershoot, or ringing. The test tool instantly
measures the rise time between 10% and 90%. For precise
measurements, set the slope to at least four time divisions.
Figure 7-13. Measuring the rise time of a pulse.
+
Do a Reset; probe scaling factor is 10:1.
Set the test tool to Scope mode.
Select Continuous Auto Set.
Press as many times as necessary until you have a
rising slope of more than four time divisions.
Make sure that the complete slope is displayed. If
necessary you can use the trigger time delay to shift the
detail on the display.
¹
Open the TIME window.
: rise time
¹
Select the rise time measurement.
Now you are ready to do a precise rise time measurement.
92B