Remote Control Basics
R&S
®
SMB100A
235Operating Manual 1407.0806.32 ─ 13
●
Standard Event Status, i.e. the Event status Register (ESR) and the Event Status
Enable (ESE), see chapter 6.5.4, "Event Status Register (ESR) and Event Status
Enable Register (ESE)", on page 237.
● Questionable Status and Operation Status, the (SCPI status registers, see chap-
ter 6.5.2, "Structure of a SCPI Status Register", on page 235, chapter 6.5.5, "Ques-
tionable Status Register (STATus:QUEStionable)", on page 238 and chapter 6.5.6,
"Operation Status Register (STATus:OPERation)", on page 239.
●
Output-Queue
The output queue contains the messages the instrument returns to the controller. It
is not part of the status reporting system but determines the value of the MAV bit in
the STB and thus is represented in the overview.
●
Error- /Event-Queue
The error-/event-queue contains all errors and events that have occurred in the past.
When reading the queue the instrument starts with the first occurred error/event.
All status registers have the same internal structure.
SRE, ESE
The service request enable register SRE can be used as ENABle part of the STB if the
STB is structured according to SCPI. By analogy, the ESE can be used as the ENABle
part of the ESR.
6.5.2 Structure of a SCPI Status Register
Each standard SCPI register consists of 5 parts. Each part has a width of 16 bits and has
different functions. The individual bits are independent of each other, i.e. each hardware
status is assigned a bit number which is valid for all five parts. Bit 15 (the most significant
bit) is set to zero for all parts. Thus the contents of the register parts can be processed
by the controller as positive integers.
Fig. 6-2: The status-register model
Status Reporting System
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