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Chapter 9
Measurement Applications (Sample Programs)
Reading Measurement Results Using Data Buffer
Reading Measurement Results Using Data Buffer
This application program reads measurement data in ASCII format using data buffer.
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 Data buffer memory to 5 points. Sets the
trigger conditions of the E4981A.
Measurement
Reads the measurement data using the :FETCh? command for 5
memory data points, separates the returned ASCII format character
string data with commas, and displays the Primary and Secondary
Measurement data for all memory points.
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.