Tektronix 071-0957-03, User Manual

Page: 58 / 254

Application Examples
2- 6
TDS3000B Series User Manual
Customizing Your Measurements
In this example you want to verify that the incoming signal to a
piece of digital equipment meets its specifications. Specifically, the
transition time from a low logic level (0.8 V) to a high logic level
(2.0 V) must be 10 ns or less.
2.0 V
≤
10 ns
0.8 V
To select the rise time measurement, do these steps:
1. Push the MEASURE button to see the measurement menu.
2. Push the CH 1 button and then the Select Measurement for Ch1
screen button.
3. Select the Rise Time measurement.
Rise time is typically measured between the 10% and 90% amplitude
levels of a signal; these are the default reference levels the
oscilloscope uses for rise time measurements. However, in this
example you need to measure the time the signal takes to pass
between the 0.8 V and 2.0 V levels.
You can customize the rise time measurement to measure the signal
transition time between any two reference levels. You can set each of
those reference levels to a specific percent of the signal amplitude or
to a specific level in vertical units (such as volts or amperes).