China Electronics Technology Instruments AV3672 Series, User Manual

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Appendix
Appendix 2 Time Domain Measurement
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2.2 Resolution and Range of Time Domain Measurement
This section discusses how to observe all effective time domain data of the DUT and how to perform setting to
obtain the highest resolution and maximum measurement range.
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Response resolution ································································································ 373
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Display resolution
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Measurement range
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2.2.1 Response Resolution
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Concept of response resolution
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Factors affecting time domain response resolution
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Ways of optimization of response resolution ···································································· 375
2.2.1.1 Concept of Response Resolution
The time domain response resolution of the analyzer refers to the capability to distinguish two adjacent responses.
For the responses of the same amplitude, it is equal to the pulse width of the impact response defined at the 50%
(6dB) amplitude point, or the rising time of the step response defined at 10% to 90% of the amplitude, as shown in
Fig. 2.2.
Fig. 2.2 Time Domain Response Resolution
2.2.1.2 Factors Affecting Time Domain Response Resolution
1) Frequency span
Fig. 2.3 shows the influence of the frequency span on the response resolution.
Fig. 2.3 Influence of Frequency Span on Response Resolution
a) The response measured within the narrow frequency span is the pulse overlapping effect of separate impact
responses.
b) The analyzer can distinguish different responses during measurement within the wide frequency span.