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65
WARNING
Do not move/ delete/ rename factory data files
All factory data files in D:\S1465data\ sys\ directory cannot be moved, deleted and renamed by the
user. Otherwise, the factory will not be responsible for any serious consequence caused by output
errors of the instrument. If the user deletes any one by mistake, either system recovery or
recalibration in the factory can be conducted.
All user data files in D:\S1465data\user\ directory can be operated by the user with caution, and
note that the data saved by the user cannot be recovered anymore after being deleted by mistake.
2.4.2.2 File input/output method
The S1465 series signal generator provides data file input/output function. File input refers to
opening the selected data file and refreshing the parameter display of controls (including list, etc.), for
ease of observation and evaluation; while file output refers to storing the configuration data in the file
in the agreed format (such as ASCII, *.dat). The signal generator provides input/output of debugging
information files. The user only needs to enter the corresponding menu to pop up the dialog box and
select the dialog box key or menu item to perform the file operations.
The S1465 series signal generator has the instrument debugging function. This function is only
open to the factory for maintenance instead of users. Important debugging data includes: Amplitude
flatness data, I/Q modulation calibration data and reference frequency response calibration data.
Relevant information files can be loaded to display the parameter component information in a list for
ease of observation, and these debugging data can also be stored in default files.
2.4.2.3 File format description
The file formats stored in the signal generator are described here to help users to analyze
configuration data. There are two types of these file formats: Direct storage and storage of additional
file header information.
1)
Direct storage
During storage of such files, the configuration result data structure can be directly stored in the
files (*.dat), such as the instrument debugging information. Such files are poorly readable after being
directly opened and are not used as a means for reference analysis by users. They are usually
recovered to the controls for viewing through the file input/output function.
2)
Storage of additional file header information
According to design requirements, some files need additional file headers, which occupy 256
Bytes and are used for storing associated parameter information. For example: For any random
waveform segment data file, the associated parameter information is firstly stored in the agreed
format, such as symbol length, sampling clock, factory identification and other information, and then
the waveform data is stored. Relevant user files involved with additional file header information are
listed in the following table (Table 2.9):
Table 2.9 Storage Format of Files with Additional File Headers
Waveform segment file (.seg)
File header composition
Description
Reservation (Byte4-Byte7)
Sampling rate (Byte8-Byte15)
INT64 type
Sampling rate = Symbol rate × Number of
oversampling points
Symbol length (Byte16-Byte23)
INT64 type Number of waveform segment
symbols saved currently.
Number of oversampling points
INT64 type Number of interpolation points for
