Agilent Technologies 5000 Series manual Mss

Commands by Subsystem 3

Table 28 Common (*) Commands Summary (continued)

Command	Query	Options and Query Returns
n/a	*STB? (see page 81)	<value> ::= 0 to 255; an integer
		in NR1 format, as shown in the
		following:
		Bit Weight		Name "1" Indicates
		--- ------		---- ---------------
		7	128	OPER Operation status
					condition occurred.
		6	64	RQS/ Instrument is
				MSS	requesting service.
		5	32	ESB	Enabled event status
					condition occurred.
		4	16	MAV	Message available.
		3	8	----	(Not used.)
		2	4	MSG	Message displayed.
		1	2	USR	User event
					condition occurred.
		0	1	TRG	A trigger occurred.
*TRG (see page 83)	n/a	n/a
n/a	*TST? (see page 84)	<result> ::= 0 or non-zero value;
		an integer in NR1 format
*WAI (see page 85)	n/a	n/a

Introduction to The common commands are defined by the IEEE 488.2 standard. They are Common (*) implemented by all instruments that comply with the IEEE 488.2 standard. Commands They provide some of the basic instrument functions, such as instrument

identification and reset, reading the instrument setup, and determining how status is read and cleared.

Common commands can be received and processed by the instrument whether they are sent over the interface as separate program messages or within other program messages. If an instrument subsystem has been selected and a common command is received by the instrument, the instrument remains in the selected subsystem. For example, if the program message ":ACQuire:TYPE AVERage; *CLS; COUNt 256" is received by the instrument, the instrument sets the acquire type, then clears the status information and sets the average count.

In contrast, if a root level command or some other subsystem command is within the program message, you must re- enter the original subsystem after the command. For example, the program message ":ACQuire:TYPE AVERage; :AUToscale; :ACQuire:COUNt 256" sets the acquire type, completes the autoscale, then sets the acquire count. In this example, :ACQuire must be sent again after the :AUToscale command in order to re- enter the ACQuire subsystem and set the count.

Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Reference 63