Technical data

9-6
Understanding the CITIfile Data Format
CITIfile Keywords
BEGIN
4.45404E-1,4.31518E-1
8.34777E-1,-1.33056E-1
-7.09137E-1,5.58410E-1
4.84252E-1,-8.07098E-1
END
When an instrument’s frequency list mode is used, as it was in Example 4, a list of frequencies is stored in
the file after the VAR_LIST_BEGIN statement. The unsorted frequency list segments used by this
instrument to create the VAR_LIST_BEGIN data are defined in the #NA ARB_SEG statements.
CITIfile Keywords
Keyword Explanation and Examples
CITIFILE CITIFILE A.01.01 identifies the file as a CITIfile, and indicates the
revision level of the file. The CITIfile keyword and revision code must
precede any other keywords. The CITIfile keyword at the beginning
of the package assures the device reading the file that the data that
follows is in the CITIfile format. The revision number allows for
future extensions of the CITIfile standard. The revision code shown
here following the CITIfile keyword indicates that the machine
writing this file is using the A.01.01 version of CITIfile as defined
here. Any future extensions of CITIfile will increment the revision
code.
NAME NAME CAL_SET allows the current CITIfile "package" to be named.
The name of the package should be a single word with no embedded
spaces. A list of standard package names follows:
Label Definition.
RAW_DATA Uncorrected data.
DATA Data that has been error corrected.When only a single data array
exists, it should be named DATA.
FORMATTED Corrected and formatted data.
MEMORY Data trace stored for comparison purposes.
CAL_SET Coefficients used for error correction.
CAL_KIT Description of the standards used.
DELAY_TABLE Delay coefficients for calibration.
VAR VAR FREQ MAG 201 defines the name of the independent variable
(FREQ), the format of values in a VAR_LIST_BEGIN table (MAG, if
used), and the number of data points (201).Typical names for the
independent variable are FREQ (in Hz), TIME (in seconds), and
POWER (in dBm). For the VAR_LIST_BEGIN table, only the "MAG"
format is supported at this point. # #NA POWER1 1.0E1 allows
variables specific to a particular type of device to be defined. The
pound sign (#) tells the device reading the file that the following
variable is for a particular device. The "NA" shown here indicates that