NF FRA51615, Инструкция по эксплуатации

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9.4 Analysis processing section
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FRA 51615
9.4.2 GAIN
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Analysis modes
Ratio CH1/CH2, CH2/CH1
Amplitude CH1, CH2
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Graph types
Bode plot A graph with the frequency on the X axis
Nyquist plot A graph with the real part on the X axis and the imaginary part on the Y axis
Nichols plot A graph with gain on the X axis and phase on the Y axis
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Measurement data items and display range
The actual measured values and display range for each parameter are constrained by the measurement
range and the frequency, etc.
dBR (gain dB) ±999.999 dB, resolution 0.001 dB
θ (phase)
±180° -180.000° to 179.999°, resolution 0.001°
0 to 360° 0.000° to 359.999°, resolution 0.001°
-360 to 0° -360.000° to -0.001°, resolution 0.001°
UNWRAP -9999.999° to + 9999.999°, resolution 0.001°
GD (group delay) ±(1 a to 999.999 G)s or 0 s, resolution 6 digits or 1 as
(when the analysis mode setting is CH1/CH2 or CH2/CH1)
R (absolute gain) 0 to 999.999 G (ratio, unitless number), resolution 6 digits or 1 a
a (real part of gain) ±(1 a to 999.999 G) or 0 (ratio, unitless number), resolution 6 digits or 1 a
b (imaginary part of gain)
±(1 a to 999.999 G) or 0 (ratio, unitless number), resolution 6 digits or 1 a
(when the analysis mode setting is CH1 or CH2)
R (amplitude) 0 Vrms to 999.999 GVrms, resolution 6 digits or 1 aVrms
a (real part of amplitude)
±(1 a to 999.999 G) Vrms or 0 Vrms, resolution 6 digits or 1 aVrms
b (imaginary part of amplitude)
±(1 a to 999.999 G) Vrms or 0 Vrms, resolution 6 digits or 1 aVrms

Measurement accuracy for other than R and θ
Accuracy of measurement items other than R (absolute gain) and θ (phase). Where defined the accuracy
of R as Ra %, the accuracy of θ as θa, and the measurement value of θ as θx, specified in " 9.4.1
Common items , ● Measurement accuracy (fixed range) and ● Measurement accuracy (AUTO range)".
GD (group delay)
±{θa / (APT × 360)} s
APT: The unit for aperture in the group delay display is hertz
a (real part of gain) ±(Ra / cos θx)%
b (imaginary part of gain) ±(Ra / sin θx)%

Error correction function
Equalizing This function obtains the characteristics for the measurement target alone by
measuring the frequency characteristics of the measurement system (sensors,
cables, etc.) in advance and then eliminate that error component for the
measurement system when the actual measurements are performed later.