Solartron 1250 - Bode and Nyquist Plots

1250 Frequency Response Analyzer Recording, Learning and Storing Facilities
SH/1250/3 12-19
12.4.7 BODE AND NYQUIST PLOTS
Different plot types may be obtained by selecting appropriate items via the ITEM soft
keys in the (PLOTTER X-AXIS] and [PLOTTER Y-AXIS] menus. See Section 4.4 above.
A Bode plot is obtained if the X-axis item is selected as [log f in Hz], and the Y-axis item
is selected as [log r in dB]. The Bode plot has a rectangular format (see Section 12.4.4
above). A typical Bode plot is shown in Fig. 12.4.
Figure 12.4 - Example plots: Bode, Nyquist, and Superimposed.
A Nyquist plot is obtained if the X-axis item is selected as [a], the real component, and
the Y-axis item is selected as [b], the imaginary component. In this case the X-axis
choice causes the plot format to be square. A typical Nyquist plot is shown in Fig. 12.4.