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Programming the Status Register System

Status Groups

Chapter 3 113

Status Groups

The Standard Operation Status Group and the Data Questionable Status Group each consist

of the following registers; the Standard Event Status Group is similar but does not have

negative or positive transition filters.

Condition

status of the signal generator. There is no latching or buffering for a

condition register; it is updated in real time.

Negative

Transition

Filter A negative transition filter specifies the bits in the condition register that

will set corresponding bits in the event register when the condition bit

changes from 1 to 0.

Positive

Transition

Filter A positive transition filter specifies the bits in the condition register that

will set corresponding bits in the event register when the condition bit

changes from 0 to 1.

Event

specified by the positive and negative transition filters. Bits in the event

querying the register contents or sending the *CLS command.

Event

Enable

summary bit. The signal generator logically ANDs corresponding bits in the

event and enable registers and ORs all the resulting bits to produce a

summary bit. Summary bits are, in turn, used by the Status Byte Register.

In general, a status group is a set of related registers whose contents are programmed to

produce status summary bits. In each status group, corresponding bits in the condition

enable register and the result is logically ORed to produce a status summary bit in the Status

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Agilent Technologies PSG Manual de instrucciones Pagina 127