To perform a curve fit
1 Setup the curve fit.
2 Press [
Analys
][
CURVE FIT
][
START FIT
].
3 To overlay the results,
press [
Disp Format
][
SINGLE FRNT/BACK
].
4 To view the curve fit table, press [
TABLE ON OFF
] to highlight ON.
The curve fit table displays the number of poles and zeros that the curve fitter selected
to characterize the original frequency response measurement.
The curve fitter does not use coherence data for the curve fit calculation unless you
have coherence assigned to trace B. The analyzer replaces coherence data with the
curve fit trace after the initial pole-zero and variance calculations are completed.
If you overlay the results in step 3, the vertical scaling for trace B is automatically set
to match trace A.
0Hz 3.2kHzAVG: 50
A: D1FreqResp X:0 Hz Y:-1.314 dB
50
dB
-50
dB
dBMag
10
dB
/div
X:0 Hz Y:-7.5083dBB: D6CurveFit
35
dB
-15
dB
dBMag
5
dB
/div
0Hz 3.2kHzAVG: 50
Curve Fit trace appears
in Trace B.
0Hz 3.2kHzAVG: 50
A: D1FreqResp X:0 Hz Y:-1.314 dB
50
dB
-50
dB
dBMag
10
dB
/div
X:0 Hz Y:-7.5083dBB: D6CurveFit
35
dB
-15
dB
dBMag
5
dB
/div
Use [SINGLE FRNT/BACK]
to overlay results.
Agilent 35607A
Operator's Guide Curve Fit Option 1D3
16-33