Measuring Waveforms
TDS 420A, TDS 430A, TDS 460A & TDS 510A User Manual
3–79
Units is helpful for setting precise values. For example, if you are measuring
specifications on an RS-232-C circuit, set the levels precisely to RS-232-C
specification voltage values by defining the high and low references in units.
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 Delay or Phase Measurements. The default is 50%.
Figure 3–41: Measure Menu — Reference Levels
The delay measurement lets you measure from an edge on the selected waveform
to an edge on another waveform. To make 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.
Take a Delay
Measurement
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