Command Groups
Status and Err
or Command Group
YouusethecommandsintheStatusandErrorcommandGrouptodeterminethe
status of the instrument and control events. Several commands and queries used
with the inst
rument are common to all devices on the GPIB bus. The IEEE Std
488.2–1987 defines these commands and queries. The c ommon commands begin
with an asterisk (*) character.
Command
Description
*CLS Clears status
*ESE Sets or returns the standard Event Status
Enable Register
*ESR? Sets or returns the standard Event Status
Register
*OPC Sets OPC event when all pending operations
are finished
Returns "1" when all current operations
complete
*OPT? Returns a list of installed options
*PSC Sets or returns the power on status flag
*RST Resets the instrument to factory default
settings
*SRE Sets or returns the bits in the Service
Request Enable Register
*STB? Returns the contents of the Status Byte
Register
*WAI Prevents the instrument from executing
further commands until all pending
operations finish
ALLEv?
Returns a ll events
BUSY?
Returns instrument status
DESE Sets or returns the bits in the Device Event
Status Enable Register
EVENT? Returns event code from the event queue
EVMsg? Returns event code, message from the event
queue
EVQty? Returns number of events in the event queue
ID? Returns identifying information about the
instrument and its firmware
System Command Group
You use the commands in the System Command Group to obtain information
about your system, such as the serial numbers of your instrument, installed
DSA/CSA/TDS8X00/B Series Programmer Manual 2-33
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