Agilent Technologies 5000 Series manual Poll, Mss

3Commands by Subsystem

Table 32 Status Byte Register (STB) (continued)

Bit	Name	Description	When Set (1 = High = True), Indicates:
6	RQS	Request Service	When polled, that the device is requesting service.
	MSS	Master Summary Status	When read (by *STB?), whether the device has a
			reason for requesting service.
5	ESB	Event Status Bit	An enabled condition in the Standard Event Status
			Register (ESR) has occurred.
4	MAV	Message Available	There are messages in the Output Queue.
3	---	---	(Not used, always 0.)
2	MSG	Message	An advisory has been displayed on the
			oscilloscope.
1	USR	User Event	An enabled user event condition has occurred.
0	TRG	Trigger	A trigger has occurred.

N O T E	To read the instrument's status byte with RQS reported on bit 6, use the interface Serial
	Poll.
See Also • "Introduction to Common (*) Commands" on page 63
	• "*SRE (Service Request Enable)" on page 79

82 Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Reference