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Measurement Definition
Measurement Parameter Definition
Baseline Measurement
Baseline positive (baseline+) is the amplitude half way between a positive peak and a
negative peak. Baseline negative (baseline-) is the amplitude measured half way between a
negative peak and a positive peak. Baseline is the average amplitude level between
baseline+ and baseline-. Baseline Separation is the amplitude level between baseline+ and
baseline-.
Figure 5-4
Baseline Definition
The Agilent E5022/E5023 can measure the baseline by a parametric module or
oscilloscope.
Oscilloscope
When an oscilloscope is used to measure a baseline, the above definition is used.
Parametric Module When parametric module is used to measure a baseline, it has a specified threshold level
which is defined as a percentage of TAA+ or TAA- . The threshold level is defined by
"hpe5022_baselinePllThreshold". The default is a threshold level of 50%. In general it is
not necessary to change this.
The module observes points on the positive slopes at the threshold level. (Points A and B in
the Figure 5-5).
Baseline+ is defined as the amplitude level at the center (point C in the Figure 5-5) of
points A and B in the time domain. (the position of point C can be changed, explained in
the latter part of this section)
Baseline- is defined as the amplitude level at the center of baseline+ and the next baseline+
points (point D in the Figure 5-5) in the time domain.
Baseline is the average amplitude between baseline+ and baseline-.
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Chapter 5
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