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Chapter 9
Measurement Applications (Sample Programs)
Executing OPEN/SHORT/LOAD Correction
Executing OPEN/SHORT/LOAD Correction
This application program executes the OPEN/SHORT/LOAD correction in the E4981A.
The program of
is described in detail below. Each explanation below is
inserted as a comment line in the program. For details on the VISA functions, refer to the
I/O Library Suite manual.
Configuration
Define Variables and initialize the program.
Open Instrument Assigns a USB address or GPIB address to the I/O bus.
Setup Start
Presets the E4981A. Sets the measurement conditions and the LCD
display.
Setup End
Closes the I/O bus.
ErrorProc
Displays an error number when an error occurs.
ErrorCheck
A subroutine to check whether an error occurs when the IO Library
Suite function is executed.
SelectMode
A subroutine to change assignment of the I/O bus and address setting
according to the connection type i.e. USB or GPIB between the
E4981A and a PC.
FnComp
A function which performs OPEN/SHORT/LOAD correction and
returns 1 on success and 0 on failure.
Save_Corr_File A function which reads the E4981A correction data such as Frequency,
Primary and Secondary parameters correction values for
Open/Short/Load, Standard values for Open/Short/Load, Cable length
and Phase Shift and then saves this data in a text file.