Measurement
355
• Comment line is preceded by an exclamation mark (!), and includes
returned value of *IDN?, file created date, calibration state, list of all
S parameters of a specified port, and port impedance setting when
saving the data.
• Option line includes format information.
The header parts of s1p and s4p are shown below.
Header of s1p
Header of s1p
!Agilent Technologies,E5071C,<ID>,<FW Revision>
!Date <Date>
!Data & Calibration Information
!Freq Sww:Method(Stat)
!PortZ PORT-w:R+jX
!Above PortZ is port Z conversion or system Z0 setting when saving the data.
!When reading, reference impedance value at option line is always used"
# Hz S FMT R Z0
Header of s4p
!Agilent Technologies,E5071C,<ID>,<FW Revision>
!Date <Date>
!Data & Calibration Information
!Freq Sww:Method(Stat) Sxw:Method(Stat) Syw:Method(Stat) Szw:Method(Stat)
.
.
Swz:Method(Stat) Sxz:Method(Stat) Syz:Method(Stat) Szz:Method(Stat)
!PortZ PORT-w:R+jX Port-x:R+jX Port-y:R+jX Port-z:R+jX
!Above PortZ is port Z conversion or system Z0 setting when saving the data.
!When reading, reference impedance value at option line is always used"
# Hz S FMT R Z0
Comment line
Touchstone data files include comments. Comments are preceded by an
exclamation mark (!).
Each item has the following meaning:
Parameter Description
Sww to Szz
S parameters of the selected test port; corresponds in
ascending order, beginning with w to z.
Method Calibration type applied to S parameter.
Stat
State of S parameter calibration and error correction
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