User Manual

Network and Remote Operation
R&S
®
FPL1000
561User Manual 1178.3370.02 ─ 09
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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.
10.1.7.2 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.
Figure 10-3: The status-register model
Description of the five status register parts
The five parts of a SCPI register have different properties and functions:
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CONDition
The CONDition part is written into directly by the hardware or the sum bit of the
next lower register. Its contents reflect the current instrument status. This register
Remote Control Basics