Figure 5-46 Graph Plotted From Example. Wayne Kerr 3260B

Advanced Operation 5–47

Figure 5-46 Graph Plotted From Example

14) By stepping the marker along the graph with the and navigation keys, the measurement result and frequency can be seen at the marker position in the bottom-left corner of the screen.

15) Pressing the FUNCTION soft key will display the other soft key functions available. These are described in section 5.15.2—Parameters Available when the Graph is Displayed

5.16 RESONANCE MODE

RESONANCE MODE identifies and analyses either series or parallel resonances in the component under test. These are typically caused by the self-inductance of capacitors or the self-capacitance of inductors respectively. For analysis purposes, the equivalent circuits shown below are assumed.

Figure 5-47 Series Equivalent Circuit Figure 5-48 Parallel Equivalent Circuit

At the selected resonant frequency, the capacitive and inductive reactances are equal and opposite, giving a measured impedance that is purely resistive. By making measurements above and below this frequency, the exact resonant characteristics are found by interpolation. For resonances with reasonably high Q factors, accurate results are returned for the resonant frequency (fo), self inductance (Ls) or self capacitance (Cp). The Q value and effective resistance at resonance (Zo) are also indicated.