In a gain measurement the following result formats are available:
Gain Result Formats
Magnitude: Displays the magnitude of the measured
Gain.
Magnitude (dB): Displays the magnitude of the
measured Gain in dB
Phase (°): Displays the phase of the measured Gain in
degrees.
Phase (rad): Displays the phase of the measured Gain
in radians.
Tg: Displays the group delay of the measured Gain in
seconds (see Gain result format equations for details).
Polar: Displays the measured Gain in a polar chart.
Real: Displays the real part of the measured Gain.
Imaginary: Displays the imaginary part of the measured
Gain.
Nyquist: Displays the measured Gain in a Nyquist
chart.
Nichols: Displays Gain over Phase in the Nichols
chart. Right-click into the chart to activate closed-loop
gridlines.
Q(Tg): Displays the Q-factor derived from group delay.
This value is used for NISM (see cursor calculations on
page 143 for details).
Gain result format equations
The Gain results are calculated based on the following equations:
Gain H:
where h is the magnitude of gain H and φ the phase of H.
ω is the angular frequency
with the frequency f.
Group delay Tg is calculated by symmetric difference quotient
Q(Tg) is the quality factor derived from the group delay
38
OMICRON Lab
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