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

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
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
know which file extension is needed for your particular job.
Raw Arrays
On the analyzer, press the
Data created the first time in this manner will be saved as filename "FILE00.r1". The file extension .r1
indicates the data was created while channel 1 was active and stored in the analyzer's raw data array. If you
save the data again, but while channel 2 is active, you will get a new file called "FILE01.r2". RAW data are
not commonly used unless sophisticated data processing is to be performed in an external PC. As an
example, multi-port calibration is created by exporting raw data to a PC where error-correction for each of
the multi-port paths is applied to them.
DEFINE DISK-SAVE
Save/Recall DEFINE DISK-SAVE
Printing, Plotting, and Saving Measurement Results
Saving Measurement Results
Figure 4-13 on page 4-38.
menu. When using these files, it is important to
RAW ARRAY ON
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