Agilent Technologies 8753ET User Manual page 251

If
DATA ARRAY ON
saved 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
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
•
DATA ARRAY ON
•
SAVE USING ASCII
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)
, or
DATA ONLY ON
or
DATA ONLY ON
is selected
Printing, Plotting, and Saving Measurement Results
, or
FORMAT ARY ON
is selected using
DEFINE DISK SAVE
Saving Measurement Results
is selected, a CITIfile is
RAW ARRAY ON
4-45
is