Network and Remote Operation
R&S
®
FSVA3000/ R&S
®
FSV3000
667
User Manual 1178.8520.02 ─ 01
●
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.
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.
13.1.7.2
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 13-3: The status-register model
Description of the five status register parts
The five parts of a SCPI register have different properties and functions:
●
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
