Download AFG 3.0 AT SERIES Specifications

Status and Events
Standard Event Status Register (SESR). The SESR records eight types of events
that can occur within the instrument as shown in Figure 3-3.
7
6
5
4
3
2
1
0
PON URQ CME
ME EXE DDE QYE RQC O PC
Figure 3-3: The Standard Event Status Register (SESR)
Table 3-2: SESR bit functions
Bit
Function
7 (MSB)
PON
Power On. Indicates that the power to the instrument is on.
6
URQ
User Request. Indicates that an application event has occurred. The
arbitrary/function generator does not use this bit.
5
CME
Command Error. Indicates that an error occurred while the
arbitrary/function generator was parsing a command or query.
4
EXE
Execution Error. Indicates that an error occurred while the
arbitrary/function generator was executing a command or query.
Execution errors occur for one of the following reasons:
„ A value designated in the argument is outside the allowable
range of the instrument, or is in conflict with the capabilities of the
instrument.
„ The command was not executed properly because the conditions
for execution is differed from those required.
3
DDE
Device Error. An instrument error has been detected.
2
QYE
Query Error. Indicates that a query error has been detected by the
output queue controller. Query errors occur for one of the following
reasons:
„ An attempt was made to retrieve messages from the output
queue when the output queue is empty or in pending status.
„ The output queue message was cleared while it was being
retrieved from the output queue.
3-6
1
RQC
Request Control. The arbitrary/function generator does not use this
bit.
0
OPC
Operation Complete. Indicates that the operation is complete. This bit
is set when all pending operations complete following the *OPC
command.
AFG3000 Series Arbitrary/Function Generators Programmer Manual