R&S ESR Series

Remote Control
R&S
®
ESR
575User Manual 1175.7068.02 ─ 12
vides a rough overview of the instrument status, collecting the information of the
lower-level registers.
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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
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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.
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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.
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.
11.1.6.2 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.
Remote Control - Basics