Appendix 1

Sampling Techniques

There are two sampling techniques:

 series (sequential) sampling with interpolation, and

 parallel sampling with holding network [79, Chapter 2].

Series Sampling with Interpolation

The derating measurements as described in Section 2.8 are based on sequential sampling utilizing the soft- and hardware specified by the UCDAS-16G Manual of the Keithley Corporation [80, Chapter 2]. The software program is written in Quick BASIC language. Sampling programs for two and five channels have been used [81, Chapter 2]. Some of the frequently asked questions concerning sequential sampling are addressed as follows.

1.1 What criterion is used to select the sampling rate (see line 500 of two-channel program [81, chapter ...

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