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@@ -3,6 +3,8 @@
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This chapter introduces the theory and facts that are related to this project. It describes the necessary parts of the ISO standards, measurement theory and analysis of acquired data.
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+\todo[ta bort denna todo]
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+
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\section{Previous research}
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No previous research relevant to the reuse of test equipment was found. Though there is research available on smaller specific topics that are covered by this project, such as measurement techniques and curve fitting. Such findings are used in this theory chapter.
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@@ -60,7 +62,7 @@ This pulse simulates the event of a load, parallel to the DUT, is disconnected.
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\todo[Två bilder, en på kurvan och en på kretsen som orsakar den. En tabell med parametervärden.]
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\subsection{Test pulse 3a and 3b}
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-Test pulse 3a and 3b simulates switching activity of devices in the system, causing either negative or positive voltage transients. These transients are very short, compared to the other pulses, and the repetition time is very high frequent. The pulses are sent in bursts, grouping a number of pulses together and separating groups by a fixed time.
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+Test pulse 3a and 3b simulates transients ``which occur as a result of the switching process'' as stated in \cite{iso-7637-2}. The formulation is not very clear, but is interperted and explained by Frazier and Alles \cite{comparison_iso_7637_real_world} to be the result of a mechanical switch brekaking an inductive load. These transients are very short, compared to the other pulses, and the repetition time is very short. The pulses are sent in bursts, grouping a number of pulses together and separating groups by a fixed time.
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These pulses contain high frequency components, up to 100~MHz, and special care must be taken when running tests with them as well as when verifying them.
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@@ -245,7 +247,7 @@ Resistive attenuators.. \todo[fyll på]
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The shortest rise time is xxx ns, which can roughly be compared to yyy MHz. \cite{source}
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The relationship and requirements, addition of rise time limitations etc
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-Combined rise time \cite{source den där boken}.
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+Combined rise time \cite{vilken_bok_menar_jag}.
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high speed digital design 83
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