Measurement Parameter Definition; Taa Measurement - Agilent Technologies E5035A Operation Manual

Measurement Definition

Measurement Parameter Definition

Measurement Parameter Definition
This section provides the parameter definitions for measurements. The TAA, PW, Baseline
and Resolution parameters can be measured by a parametric module or an oscilloscope.
There is a slight difference in measurement definition between the two.

TAA Measurement

The TAA is defined as the average peak-to-peak amplitude measurement for a period.
Oscilloscope When an oscilloscope is used for TAA measurement, TAA is measured as the average
peak-to-peak amplitude for several waveform periods. The number of waveform periods is
specified by the "hpe5022_waveAverage" function.
TAA positive and TAA negative are the average amplitudes between the
real-time-measured baseline and peaks. The baseline definition is shown in Figure 5-4.
Parametric Module When parametric module is used for TAA measurement, it is measured as the average
peak-to-peak amplitude for a number of disk revolutions. The number of revolutions for
averaging is specified by the 'ave.' parameter.
TAA positive (TAA+) is the average amplitude between the baseline reference specified by
the "hpe5022_baselineReference" function and the positive peaks. TAA negative (TAA-)
is measured between the baseline reference and the negative peaks.
TAA Asymmetry is defined as :
Equation 5-1 TAA Asymmetry Definition
Modulation defined as the modulation of amplitude during one revolution. TAA data of the
last revolution of TAA measurement is used to calculate. TAA
amplitude level in the last revolution. TAA
averaged amplitude level in the last revolution.
Equation 5-2 Modulation Peak to Peak Definition
Modulation
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TAA
TAA = -------------------------------------------------------------- -
Asymmetry
TAA
TAA
= ----------------------------------------------------------------------------------- -
PeaktoPeak
Ð TAA
positive negative
+ TAA
positive negative
is a minimum one. TAA is an
RawDataMin
Ð TAA
RawDataMax RawDataMin
TAA
is a maximum
RawDataMax
Chapter 5