Agilent Technologies N3280A manual Programming the Status Registers, DC Source Status Model

Programming the DC Source - 5

Programming the Status Registers

Status register programming lets you determine the operating condition of the dc source at any time. For example, you may program the dc source to generate an interrupt (SRQ) when an event such as a current limit occurs. When the interrupt occurs, your program can act on the event in the appropriate fashion.

Figure 5-5 shows the status register structure of the dc source. Table 5-1 defines the status bits. The Standard Event, Status Byte, and Service Request Enable registers and the Output Queue perform standard GPIB functions as defined in the IEEE 488.2 Standard Digital Interface for Programmable Instrumentation. The Operation Status and Questionable Status registers implement functions that are specific to the dc source.

QUESTIONABLE STATUS (IDENTICAL REGISTERS FOR EACH CHANNEL)

CONDITION PTR/NTR EVENT ENABLE

OV+ 0 1 OV - 1 2

PCLR 2 4

OT 4 16

UNR 10 1024

OSC 12 4096 Meas Ovld 14 16384

1

2

4

16

1024

4096

16384

1

2

4

16

1024

4096

16384

1

2

4

16

1024

4096

16384

LOGICAL

OR

	CHAN 1QSUM
	QSUM	LOGICAL
	CHAN 2	OR
SAME	QSUM
AS	CHAN 3
	QSUM
CHAN 1
	CHAN 4

					STANDARD EVENT																				SERVICE
																					STATUS BYTE REQUEST
						STATUS
			0	EVENT				ENABLE					OUTPUT QUEUE							WTG	2				ENABLE
	OPC			1				1						DATA		QUEUE				QUES	3	8				8
														DATA		NOT
	QYE		2	4				4								EMPTY				MAV	4
														DATA								16				16	LOGICAL
			3
	DDE			8				8		LOGICAL										ESB	5	32				32	OR
			4
	EXE			16				16			OR									MSS	6			RQS
	CME		5	32				32
			7																	OPER	7	128				128
	PON			128				128
						OPERATION STATUS
		(IDENTICAL REGISTERS FOR EACH CHANNEL)
	CONDITION PTR/NTR								EVENT		ENABLE
																								SERVICE
CV	0	1					1		1			1												REQUEST
CL+	1	2					2		2			2			LOGICAL		CHAN 1OSUM						GENERATION
		4
CL - 2							4		4			4			OR
CC	3	8					8		8			8						OSUM	LOGICAL
VL+ 4		16					16		16			16					CHAN	2		OR
																	CHAN 3OSUM
VL - 5		32					32		32			32
	6	64					64		64			64					CHAN 4OSUM
OFF
																SAME
																AS
																CHAN 1

Figure 5-5. DC Source Status Model

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