Agilent Technologies 8753ET Especificações descarregar pdf (Página 246)

9-12

Understanding the CITIﬁle Data Format

Useful Calculations

Expressing CITIﬁle Data in Other Data Formats

CITIﬁle data is represented in real and imaginary pairs. Equations can be used to express

this information in logarithmic magnitude, phase, polar, and Smith chart formats. Refer to

the following table for these equations.

Desired Format

Mathematical Equation

a. Re = real. Im = imaginary.

Microsoft Excel Command

b. The references to ReCell 1, ImCell 1, and Z Cell 1 refer to the real and imaginary data pair numeric values

that have been entered into speciﬁc cells in the Microsoft Excel spread sheet.

Log Magnitude

20*Log10((Re2 + Im2)) 1/2 =20*LOG10(SQRT((SUMSQ(ReCell 1,Im Cell 1)))) (dB)

Phase

tan-1(Im/Re) or arctan (Im/Re) ATAN2(ReCell 1, ImCell 1)*180/PI() (Degree)

Polar

Magnitude = ((Re2 + Im2)) 1/2 Magnitude = (SQRT((SUMSQ(ReCell 1,Im Cell 1)))

Phase = tan-1(Im/Re) or Phase = ATAN2(ReCell 1, ImCell 1)*180/PI()

arctan (Im/Re)

Smith Chart

Resistance = Resistance =

(Marker)

(1 - Re2-Im2) / ((1-POWER(ReCell 1,2)-POWER(ImCell 1,2)) /

((1 -Re) 2+Im2)) * Z0 (POWER((1- ReCell 1),2)+POWER(ImCell 1,2))) * Z Cell 1

Reactance = Reactance =

(2*Im) / (2*ImCell 1) /

((1 - Re) 2+Im2)) * Z0 (POWER((1- ReCell 1),2)+POWER(ImCell 1,2)))*Z Cell 1

1 2 ... 241 242 243 244 245 246 247 248 249 250 251 ... 261 262

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Agilent Technologies 8753ET Especificações Página 246