Saving Time Gated Frequency Data; Differences Between Raw, Data, And Format Arrays - Agilent Technologies 8753ET User Manual

Files with .g0 File Extension
FileXX.g0, produced only when
containing the active measurement trace and display graticule. The contents of this file are
not meant to be read in an external computer, so this file is only of use in the instrument.
Binary Files
The size of the data files is very small, about one tenth the size compared to the ASCII
format. Binary is the format to use when you want to store and recall instrument states on
the analyzer quickly, but do not need to read the data in an external computer.
Viewing Files Within the Analyzer
All these files are rolled up into a single instrument state, so the analyzer shows only the
"FileXX" part of the name, without an extension. The file description will say ISTATE,
followed by parentheses with letters in them, such as (CDG). These letters are explained
on the bottom of the analyzer screen, and indicate some of what is included in that
instrument state. In this example, the state includes the Calibration Array, Data, and
Graphics.
The only way to see all the file extensions previously described is to save the instrument
state to a disk and view the file structure on an external computer.

Saving Time Gated Frequency Data

Internal data processing is done sequentially beginning with raw data and ending with
error correction and all formatting applied. The time domain processing occurs near the
end of this processing chain, so data showing the effects of time domain processing is only
available in "formatted arrays."

Differences between Raw, Data, and Format Arrays

The following discussion explains the data processing flow in the network analyzer. This
information is very important if you will be utilizing data from your analyzer for use in
computer applications such as spreadsheets, word processing, programs, etc. Refer to
Figure 4-13 on page
The analyzer receives data from its A, B, and R or Aux-in inputs. Notice the three
highlighted blocks. They represent the raw, data, and format arrays. You can save your
measurement data in any or all of these format arrays each time the data is saved. Select
the arrays of interest based on the factors discussed in this section.
For this discussion, only DISK saves will be described. Data can be saved to internal
non-volatile memory or transferred over GPIB as well as to a floppy disk. You will find
multiple files saved depending on the arrays chosen under the analyzer's
DEFINE DISK-SAVE
extension is needed for your particular job.
GRAPHICS on OFF
4-43.
menu. When using these files, it is important to know which file
Printing, Plotting, and Saving Measurement Results
Saving Measurement Results
is turned ON, is a binary file
4-49