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Defhition
of
CITIfl.le
Terms
This section will
dehne
the following terms:
n
package
n
header
n
data array
8
keyword
A
CZTIfile
Package
A typical package is divided into two parts: The
hrst
part, the header, is made up of keywords
and setup information. The second part, the data,
usua.Ry
consists of one or more arrays of
data. Example 1 shows the basic structure of a
CITIlile
package:
Example 1, A
ClTIiile
package
The “header” part
CITIFILE
A.0190
NAME MEMORY
VAR
F’REQ
MAG
3
DATASRI
The “data” part
BEGIN
-3.54545E-2,-1.38601E-3
0.23491E-3,-1.39883E-3
2.00382E-3,-1.40022E-3
END
When stored in a disk
fiIe
there may be more than one
CITIfile
package. With the 8510 network
analyzer, for example, storing a “memory
all”
wiU
save
aR
eight of the memories held in the
instrument. This results in a single
fiie
which contains eight
CITIfIIe
packages
The CITIfile Header
The header section contains information about the data that
will
follow.
It may
also
include
information about the setup of the instrument that measured the data. The
CITIiile
header
shown in Example 1 has just the bare
minimum of information necessary; no instrument setup
information was included.
An
Array
of
Data
An array is numeric data that is arranged with one data element per
line.
A
CITIIile
package
may contain more than one array of data. Arrays of data start after the BEGIN keyword, and
the END keyword
wilI
follow the last data element in an array.
A
CITIfiIe
package does not
necessarily
need to include data arrays; for instance,
CITIfiIe
could
be used to store the current state of an instrument. In that case the keywords VAR, DATA,
BEGIN, and END would not be required.
A-2 The
ClTlfile
Data Format and Keyword Reference