Remote Control Basics
R&S
®
SMBV100A
428
Operating Manual 1407.6062.32 ─ 08
Bit No.
Meaning
5
ESB bit
Sum bit of the event status register. It is set if one of the bits in the event status register is set and
enabled in the event status enable register. Setting of this bit indicates a serious error which can
be specified in greater detail by polling the event status register.
6
MSS bit (master status summary bit)
The bit is set if the instrument triggers a service request. This is the case if one of the other bits of
this registers is set together with its mask bit in the service request enable register SRE.
7
Not used.
6.5.3.2
IST Flag and Parallel Poll Enable Register (PPE)
As with the SRQ, the IST flag combines the entire status information in a single bit. It can
be read by means of a parallel poll (see
chapter 6.5.5.3, "Parallel Poll"
.
The parallel poll enable register (PPE) determines which bits of the STB contribute to the
IST flag. The bits of the STB are "ANDed" with the corresponding bits of the PPE, with
bit 6 being used as well in contrast to the SRE. The IST flag results from the "ORing" of
all results. The PPE can be set using commands
6.5.4 Event Status Register (ESR) and Event Status Enable Register (ESE)
The ESR is defined in IEEE 488.2. The event status register can be read out using com-
mand
on page 434. The ESE is the associated enable part. It can be set using the
on page 434 and read using the command
*ESE?
.
Table 6-4: Meaning of the bits used in the event status register
Bit No.
Meaning
0
Operation Complete
This bit is set on receipt of the command
*OPC
exactly when all previous commands have been
executed.
1
not used
2
Query Error
This bit is set if either the controller wants to read data from the instrument without having sent a
query, or if it does not fetch requested data and sends new instructions to the instrument instead.
The cause is often a query which is faulty and hence cannot be executed.
3
Device-dependent Error
This bit is set if a device dependent error occurs. An error message with a number between 300
and 399 or a positive error number, which denotes the error in greater detail, is entered into the
error queue.
4
Execution Error
This bit is set if a received command is syntactically correct but cannot be performed for other
reasons. An error message with a number between 200 and 300, which denotes the error in greater
detail, is entered into the error queue.
Status Reporting System
Summary of Contents for SMBV100A
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