Status and Event Reporting
4-2
VX4792 User Manual
Table 4-1: SESR Bit Functions
Bit Function
7 (MSB) PON (Power On) Ċ indicates that the waveform generator was powered on.
6 URQ (User Request) Ċ indicates an event occurred, and because of that
event, the waveform generator needs attention from the operator.
5 CME (Command Error) Ċ indicates that an error occurred while the
waveform generator was parsing a command or query. Command error
messages are listed in Table B-2 on page B-2.
4 EXE (Execution Error) Ċ indicates that an error occurred while the
waveform generator was executing a command or query. An execution error
occurs for either of the following reasons:
H A value designated for the argument is not within the range allowed by
the waveform generator, is not valid for the command, or is incorrect in
some other way
H Execution took place improperly under conditions that are different from
those which should have been requested
Execution error messages are listed in Table B-3 on page B-3.
3 DDE (Device Dependent Error) Ċ indicates that a deviceĆspecific error
occurred. Device error messages are listed in Table B-4 on page B-5.
2 QYE (Query Error) Ċ indicates that an error occurred when attempting to
read the output queue. Such an error occurs for one of the following two
reasons:
H An attempt was made to retrieve a message from the output queue
even though it is empty or pending
H Output queue message was cleared while it was being retrieved from
the output queue
1 RQC (Request Control) Ċ the waveform generator does not use this bit.
Request Control (RQC) is used to show that an instrument has requested to
transfer bus control back to the controller. (This is the usage prescribed by
the IEEE Std. 488.1.)
0 (LSB) OPC (Operation Complete) Ċ indicates that the operation is complete. This
bit is set when all pending operations complete following an
command.
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