Chapter 9
119
Measurement Applications (Sample Programs)
Reading Measurement Results in ASCII Format Using *TRG Command
9.
M
easu
rem
ent
Applica
tio
ns
(S
amp
le
Prog
ra
ms)
Reading Measurement Results in ASCII Format Using
*TRG Command
This application program reads measurement data in ASCII format using the *TRG
command.
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 trigger conditions of the E4981A.
Measurement
Reads the measurement data using the *TRG command, separates the
returned ASCII format character string data with commas, and
displays the Primary and Secondary Measurement data.
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.