Remote Control Basics
R&S
®
SMU200A
480Operating Manual 1007.9845.32 ─ 15
Fig. 6-1: Graphical overview of the status registers hierarchy
●
STB, SRE
The STatus Byte (STB) register and its associated mask register Service Request
Enable (SRE) form the highest level of the status reporting system. The STB provides
a rough overview of the instrument status, collecting the information of the lower-level
registers.
●
ESR, SCPI registers
The STB receives its information from the following registers:
- The Event Status Register (ESR) with the associated mask register standard
Event Status Enable (ESE).
- The STATus:OPERation and STATus:QUEStionable registers which are
defined by SCPI and contain detailed information on the instrument.
●
IST, PPE
The IST flag ("Individual STatus"), like the SRQ, combines the entire instrument status
in a single bit. The PPE fulfills the same function for the IST flag as the SRE for the
service request.
●
Output buffer
The output buffer 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.
Status Reporting System
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