Agilent Technologies E4406A VSA manual Board, Instr

Programming Fundamentals

C Programming Using VTL

	The following describes the parameters used above:
	board	This optional parameter is used if you have more than
		one interface of the same type. The default value for
		board is 0.
	VSI logical
	address	This is the logical address of the VXI instrument.
	primary
	address	This is the primary address of the GPIB device.
	secondary
	address	This optional parameter is the secondary address of the
		GPIB device. If no secondary address is specified, none
		is assumed.
	INSTR	This is an optional parameter that indicates that you
		are communicating with a resource that is of type
		INSTR, meaning instrument.
	If you want to be compatible with future releases of VTL and VISA, you
NOTE
	must include the INSTR parameter in the syntax.
	The following are examples of valid symbolic names:
	XI0::24::INSTR	Device at VXI logical address 24 that is of VISA type
		INSTR.
	VXI2::128	Device at VXI logical address 128, in the third VXI
		system (VXI2).
	GPIB-VXI0::24 A VXI device at logical address 24. This VXI device is
		connected via a GPIB-VXI command module.
	GPIB0::7::0	A GPIB device at primary address 7 and secondary
		address 0 on the GPIB interface.

The following is an example of opening a device session with the GPIB device at primary address23.

ViSession defaultRM, vi;

.

.

viOpenDefaultRM (&defaultRM);

viOpen (defaultRM, “GPIB0::23::INSTR”, VI_NULL,VI_NULL,&vi);

.

.

viClose(vi); viClose (defaultRM);

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