Keysight U3606A, Programmer'S Reference Manual

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1 Introduction to SCPI
SCPI Status System
12 U3606A Programmer’s Reference
SCPI Status System
The status system records various instrument conditions and states in
several register groups. Each register group is made up of several
low- level registers called the Condition register, Event register, and Enable
register which control the action of specific bits within the register group.
• A Condition register continuously monitors the state of the instrument.
The bits in the condition register are updated in real- time and the bits
are not latched or buffered. This is a read- only register and the bits are
not cleared when you read the register.
•
An Event register latches the various events from the changes in the
condition register. There is no buffering in this register; while an event
bit is set, subsequent events corresponding to that bit are ignored. This
is a read- only register. Once a bit is set, it remains set until cleared by
a query or clear status (
*CLS ) command.
• An Enable register defines which bits in the event register will be
reported to the Status Byte register group. You can write to or read
from an enable register.
The relationship between various registers in the U3606A SCPI status
system is shown in
Figure 1- 1 .