Saving Data In Touchstone Format - Agilent Technologies ENA Series User Manual

Saving data in Touchstone format

You can also save trace data of a E5070B/E5071B active channel to a Touchstone format
file, based on 1- to 4-port models.
Touchstone file data format
You can save data in "log magnitude - angle", "linear magnitude - angle", or "real number
- imaginary number."
When AUTO is selected, the data format is automatically set according to the display
format of the active trace. However, when the display format of the active trace is set to
one other than log magnitude format (LogMag), linear magnitude format (LinMag), or
real-imaginary number format (Real/Imag), the data format is automatically set to
real-imaginary number.
You can use data saved in Touchstone format for a circuit simulator such as Agilent
Advanced Design System (ADS) on your PC (personal computer) or workstation. For
more information on the ADS, refer to the operation manual that comes with the system.
NOTE The fixture simulator function enables you to recall to the E5070B/E5071B the s2p (2-port
Touchstone file) file type used to save user-defined matching circuit information. However,
no other type of file saved in Touchstone format can be recalled to the E5070B/E5071B.
The function for saving data in Touchstone format is available from the front panel with the
firmware version A.06.50. or higher. Accordingly, the function for saving data in
Touchstone format by using VBA macro has been deleted.
When using the E5070B/E5071B with a firmeware version A.06.00 or lower, you can save
data in Touchstone format using VBA macro. For details, refer to Appendix A, "Manual
Changes," on page 583.
File types of Touchstone files
File types of the E5070B/E5071B Touchstone files are s1p, s2p, s3p, and s4p. The file type
indicates the number of ports of the data structure that is output to the Touchstone file.
Data structure in Touchstone file
Data structure of the Touchstone file consists of a header part and a data part. The contents
of the file is text data, which is ready to be read with a general text editor.
The header part consists of the returned value of *IDN?, file created date, calibration state,
list of all S parameters of a specified port, and format information.
The header parts of s1p and s4p are shown below.
Table 10-2 Header of s1p
!Agilent Technologies,E5071B,<ID>,<FW Revision>
!Date <Date>
!Data & Calibration Information
!Freq Sww:Method(Stat)
# Hz S FMT R Z0
Chapter 10
Data Output
Saving Trace Data to a File
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