Agilent Technologies 75000 SERIES B, E1301B, E1300B Operation Status Group Condition Register

Reading the Condition Register

Unmasking the

Operation Event

Register Bits

Table 4-3. Operation Status Group - Condition Register

Bit	Decimal
Number	Weight	Description
0	1	Calibrating
1	2	Settling
2	4	Ranging
3	8	Sweeping
4	16	Measuring
5	32	Waiting for TRG
6	64	Waiting for ARM
7	128	Correcting
8	256	Interrupt acknowledged (System Instrument)
9-12		Instrument Dependent
13-14		Reserved
15		Always zero

When an event monitored by the Condition register has occurred or is occurring, a corresponding bit in the register is set. The bit which is set can be determined with the command:

STATus:OPERation:CONDition?

The data which is returned is the decimal weighted sum of the set bit. Since bit 8 is the only bit used by system instrument, 256 is returned if the bit is set.

Bit 8 in the Condition register is cleared with the command:

DIAGnostic:INTerrupt:RESPonse?

When a condition monitored by the condition register occurs, a corresponding bit in the Operation Status Group Event register is automatically set. In order for this condition to generate a service request, the bit in the Event register must be unmasked using the Operation Status Group Enable register. This is done using the command:

STATus:OPERation:ENABle < event>

where event is the decimal weight of the bit to be unmasked. Since the system instrument only uses bit 8, the only useful value of event is 256.

When bit 8 is set and is unmasked, it sets bit 7 in the Status Byte register in the Status Byte Group.

Bits in the Operation Status Group Event register which are unmasked can be determined with the command:

STATus:OPERation:ENABle?

The command returns the decimal weighted sum of the unmasked bit(s).

6-8 Controlling Instruments Using GPIB