User Manual

Network and Remote Operation
R&S
®
FPL1000
563User Manual 1178.3370.02 ─ 09
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)..........................563
● IST Flag and Parallel Poll Enable Register (PPE)................................................ 564
● Event Status Register (ESR) and Event Status Enable Register (ESE)...............564
● STATus:OPERation Register................................................................................ 565
● STATus:QUEStionable Register............................................................................566
● STATus:QUEStionable:ACPLimit Register............................................................567
● STATus:QUEStionable:EXTended Register..........................................................568
● STATus:QUEStionable:EXTended:INFO Register................................................ 568
● STATus:QUEStionable:FREQuency Register.......................................................569
● STATus:QUEStionable:LIMit Register...................................................................570
● STATus:QUEStionable:LMARgin Register............................................................570
● STATus:QUEStionable:POWer Register...............................................................571
● STATus:QUEStionable:TEMPerature Register..................................................... 572
● STATus:QUEStionable:TIMe Register.................................................................. 572
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 *STB? or a serial poll.
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 *SRE and read
using the command *SRE?.
Table 10-6: 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.
3 QUEStionable status register summary bit
The bit is set if an EVENt bit is set in the QUEStionable status register and the associated
ENABle bit is set to 1. A set bit indicates a questionable instrument status, which can be speci-
fied in greater detail by querying the STATus:QUEStionable status register.
Remote Control Basics