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Remote Interface Reference
The SCPI Status System
This section describes the structure of the SCPI status system used by the
function generator. The status system records various conditions and states of the
instrument in several register groups as shown on the following page. Each of the
register groups is made up of several low-level registers called Condition
registers, Event registers, and Enable registers which control the action of specific
bits within the register group.
What is a Condition Register?
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 bits are not cleared when you read the
register. A query of a condition register returns a decimal value which corresponds
to the binary-weighted sum of all bits set in that register.
What is an Event Register?
An event register latches the various events from 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 query command (such as STAT:QUES:EVEN?) or a
*CLS (clear status) command. A query of this register returns a decimal value
which corresponds to the binary-weighted sum of all bits set in that register.
What is an Enable Register?
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. A
*CLS (clear status) command will not clear the enable register but it does clear all
bits in the event register. A STAT:PRES command clears all bits in the enable
register. To enable bits in the enable register to be reported to the Status Byte
register, you must write a decimal value which corresponds to the
binary-weighted sum of the corresponding bits.
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Keysight 33210A User's Guide
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