User`s manual

*WAI
*WAI causes the Agilent E1445A to wait for all pending operations to complete
before executing any further commands.
If
STATus:OPC:INITiate OFF is set, command execution resumes when all
commands received prior to the
*WAI have been executed. If ON is set, *WAI waits
for waveform generation to complete before resuming command execution.
Comments Executable when Initiated: Yes
Coupling Group: None
Related Commands: *OPC, *OPC?
*RST Condition: None
Chapter 8 Command Reference 427