3
Device Dependent Error
(DDE)
Set to indicate that a device-dependent error has occurred.
Device-dependent errors have SCPI error codes from
–399 to
–300 and 1 to 32767.
4
Execution Error (E)
Set to indicate that a parameter exceeds its allowed range.
Execution errors have SCPI error codes from
–299 to –200.
5
Command Error (CME)
Set to indicate that a command error has occurred.
Command errors have SCPI error codes from
–199 to –100.
6
not used
This bit is always 0.
7
Power ON (PON)
Set once upon power-up. This bit has no effect on the Error /
Event Available (EAV) bit in the Status Byte Register.
Operational Status (OSR) Register
The OSR is a 16-bit register that is used to determine the state of operation. It is read by
issuing a
:STATus:OPERation[:EVENt]?
command.
Bit
Name
Description
0-3
not used
These bits are not used and is always 0.
4
Measuring (MEAS)
Set to indicate that a query has been made for which no
response is available.
Query errors have SCPI error codes from
–499 to –400.
5-15
not used
These bits are not used and is always 0.
Output Queue
The RTSA7500 has an Output FIFO Queue that is structured as a FIFO and holds the
response messages to queries. The SBR's MAV bit is set when there are messages in
the queue. The unread results of a previous command are cleared from the queue when
a new command or query is received.
Error and Event Queue
The RTSA7500 has an Error and Event FIFO Queue that holds up to 16 errors and
events. It is queried using the :SYSTem:ERRor[:NEXT]?
command. The *CLS
command
clears all entries from the queue.
