Measuring Waveforms
3–94
TDS 684A, TDS 744A, & TDS 784A User Manual
2. Press High Ref, Mid Ref, Low Ref, or Mid2 Ref (side).
High Ref — Sets the high reference level. The default is 90%.
Mid Ref — Sets the middle reference level. The default is 50%.
Low Ref — Sets the low reference level. The default is 10%.
Mid2 Ref — Sets the middle reference level used on the second waveform
specified in the Delay or Phase Measurements. The default is 50%.
The delay measurement lets you measure from an edge on the selected waveform
to an edge on another waveform. To take a delay measurement, do the following
steps:
1. Press MEASURE ➞ Select Measrmnt (main) ➞ Delay (side) ➞ Delay
To (main) ➞ Measure Delay to.
2. Press Measure Delay to (side) repeatedly to choose the delay to waveform.
The choices are Ch1, Ch2, Ch3, Ch4, Math1, Math2, Math3,Ref1, Ref2,
Ref3, and Ref4.
The steps just performed select the waveform you want to measure to; note
that the waveform you are measuring delay from is the selected waveform.
(See Figure 3–56.)
Figure 3–56: Measure Delay Menu — Delay To
Take a Delay
Measurement
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