Reference Information for Remote Control
R&S
®
SMW200A
1328User Manual 1175.6632.02 ─ 30
OPER = Operation Status Summary Bit
RQS/MSS = Service Request Generation
ESB = Standard Event Status Summary Bit
MAV = Message Available in Output Queue
QUES = Questionable Status Summary Bit
2 = Error- /Event-Queue
1, 0 = not used
Note: This legend explains the abbreviations to the Status Byte Register.
The R&S SMW uses the following status registers:
●
Status Byte (STB) and Service Request Enable (SRE), see Chapter D.1.5.3,
"Status Byte (STB) and Service Request Enable Register (SRE)", on page 1330.
●
Standard Event Status, i.e. the Event status Register (ESR) and the Event Status
Enable (ESE), see Chapter D.1.5.4, "Event Status Register (ESR) and Event Sta-
tus Enable Register (ESE)", on page 1331.
●
Questionable Status and Operation Status, the (SCPI status registers, see
Chapter D.1.5.2, "Structure of a SCPI Status Register", on page 1328, Chap-
ter D.1.5.5, "Questionable Status Register (STATus:QUEStionable)", on page 1332
and Chapter D.1.5.6, "Operation Status Register (STATus:OPERation)",
on page 1332.
●
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.
D.1.5.2 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.
Additional Basics on Remote Control
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