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multicomp pro MP720025 User Manual

multicomp pro MP720025
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User Manual
136
in the Lissajous graph form.
(8) Turn the Vertical Scale and Vertical Position rotary controls, optimizing the
waveform.
(9) With the elliptical oscillogram method adopted, observe and calculate the phase
difference (see Figure 9-6).
Figure 9-6 Lissajous Graph
Based on the expression sin (q) =A/B or C/D, thereinto, q is the phase difference
angle, and the definitions of A, B, C, and D are shown as the graph above. As a result,
the phase difference angle can be obtained, namely, q arcsin (A/B) or ± arcsin
(C/D). If the principal axis of the ellipse is in the I and III quadrants, the determined
phase difference angel should be in the I and IV quadrants, that is, in the range of
(0 - π /2) or (3π / 2 - 2π). If the principal axis of the ellipse is in the II and IV
quadrants, the determined phase difference angle is in the II and III quadrants, that is,
within the range of (π / 2 - π) or (π - 3π /2).
The signal must be
centered and kept in the
horizontal direction.

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multicomp pro MP720025 Specifications

General IconGeneral
Brandmulticomp pro
ModelMP720025
CategoryTest Equipment
LanguageEnglish

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