Tektronix, Inc. P6240, User Manual

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Measuring Waveforms Automatically
3–70
TLS 216 User Manual
Table 3–3: Measurement Definitions (Cont.)
Name Definition
Positive Width Timing measurement of the first pulse in the waveform or gated region. The distance (time) between
MidRef (default 50%) amplitude points of a positive pulse.
Rise time Timing measurement. Time taken for the leading edge of the first pulse in the waveform or gated
region to rise from a Low Ref value (default = 10%) to a High Ref value (default = 90%) of its final
value.
RMS Voltage measurement. The true Root Mean Square voltage over the entire waveform or gated
region.
Setup
Timing measurement. The time between the last transition to a legal state for all waveforms in a
group (except the clock) and the clocking edge of the waveform specified as the clock. The clock can
be any channel. It does not have to be included in the measured group. Logic levels are dictated by
High Ref and Low Ref.
Skew Timing measurement. The time between the first transition to an illegal state for all waveforms in a
group and last transition to a legal state for the same waveforms. Logic levels are dictated by High
Ref and Low Ref.
To Measure a Single Waveform
To take an automatic measurement, you must do the following steps.
1. Obtain a stable display of the waveform to be measured. Pressing AUTO-
SET may help.
2. Select a group and channel. The article Selecting Groups and Channels on
page 3–117 explains how to do these tasks.
3. Access the Measure menu, and turn on a measurement.
Do the following procedures to take single channel automatic measurements.
To select your single channel measurement, do the following steps.
1. Use the group selection buttons to select a group. Then use the Group menu
to select a channel.
2. Press MEASURE
➞
Select Measrmnt (main). (See Figure 3-32.)
3. Select a measurement from the side menu.
When taking measurements, consider the following hints.
H
To determine the channel on which the logic scope takes the measurement,
check the measurement readout.
Select a Measurement