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Network Operation and Remote Control
R&S
®
FPL1000
554
User Manual 1178.3370.02 ─ 11
STATus:QUEStionable:SYNC register
The
STATus:QUEStionable:SYNC
register is used by the R&S
FPL1000 applica-
tions and is described in the individual sections (manuals) for each application.
Status Byte (STB) and Service Request Enable Register (SRE)
IST Flag and Parallel Poll Enable Register (PPE)
................................................ 555
Event Status Register (ESR) and Event Status Enable Register (ESE)
................................................................................ 556
............................................................................557
STATus:QUEStionable:ACPLimit Register
............................................................558
STATus:QUEStionable:EXTended Register
.......................................................... 559
STATus:QUEStionable:EXTended:INFO Register
................................................ 560
STATus:QUEStionable:FREQuency Register
....................................................... 560
STATus:QUEStionable:LIMit Register
...................................................................561
STATus:QUEStionable:LMARgin Register
............................................................561
STATus:QUEStionable:POWer Register
...............................................................562
STATus:QUEStionable:TEMPerature Register
..................................................... 563
STATus:QUEStionable:TIMe Register
.................................................................. 563
9.2.2.1
Status Byte (STB) and Service Request Enable Register (SRE)
The
STatus Byte
(STB) is already defined in IEEE 488.2. It provides a rough over-
view of the instrument status by collecting the pieces of information of the lower regis-
ters. A special feature is that bit 6 acts as the sum bit of the remaining bits of the status
byte.
The STB can thus be compared with the
CONDition
part of an SCPI register and
assumes the highest level within the SCPI hierarchy.
The STB is read using the command
The
STatus Byte
(STB) is linked to the
Service Request Enable
(SRE) register.
Each bit of the STB is assigned a bit in the SRE. Bit 6 of the SRE is ignored. If a bit is
set in the SRE and the associated bit in the STB changes from 0 to 1, a service
request (SRQ) is generated. The SRE can be set using the command
and read
using the command
*SRE?
.
Table 9-2: Meaning of the bits used in the status byte
Bit No.
Meaning
0...1
Not used
2
Error Queue not empty
The bit is set when an entry is made in the error queue. If this bit is enabled by the SRE, each
entry of the error queue generates a service request. Thus an error can be recognized and
specified in greater detail by polling the error queue. The poll provides an informative error mes-
sage. This procedure is to be recommended since it considerably reduces the problems
involved with remote control.
Status Reporting System