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Printing, Plotting, and Saving Measurement Results
Saving Measurement Results
for each displayed channel with the suffix letter “D”, or “F”, followed by a number. The number following
“D” and “F” files is the channel number. When
is selected, an “r1” file is saved for
channel 1/channel 3, and an “r5” file is saved for channel 2/channel 4. For more information on the CITIFile
data format as well as a list of CITIFile keywords, refer to the “Understanding the CITIFile Data Format”
chapter in the reference guide.
S2P Data Format
This format creates component data files that describe frequency dependent linear network parameters for
2 port components. These files are assigned a file name with the suffix "S" and are only output (that is, they
cannot be read in by the analyzers).
Up to two S2P files are saved: S1 for channel 1, and S2 for channel 2. S2P files are not stored for channel 3 or
channel 4 because the data would be redundant. Each S2P file contains all four S-parameter data.
An S2P file is only output when the all of following conditions are met:
• a full two-port or TRL two-port correction is turned on
• or is selected using
• is selected
Error-corrected data CITI files are always saved along with S2P files.
The template for component data files is as follows:
! comment line
# <frequency units> <parameter> <format> <Rn>
<data line>
..
<data line>
where
! indicates that all following on this line is a comment
# indicates that entries following on this line are parameters that are being specified
frequency units GHz, MHz, kHz, Hz
parameter S for S-parameters
format DB for dB magnitude and angle in degrees
MA for linear magnitude and angle in degrees
RI for real and imaginary pair
Rn the reference impedance in ohms for the analyzer making the measurement (R 50 or R
75)
The "format" choice is selected by the current selection under the FORMAT menu. To select the DB format,
the FORMAT must be LOG MAG. For MA, the FORMAT must be LIN MAG (unlike CITIfile), and all other
FORMAT selections will output RI data.
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