Agilent Technologies 35670A Manual page 80

Common Commands
Note
The *CLS and *RST commands cancel any preceding *OPC command or query.
Pending overlapped commands are still completed, but you can no longer determine
when.
Two GPIB bus management commands—Device Clear (DCL) and Selected Device
Clear (SDC)—also cancel any preceding *OPC command or query.
A list of overlapped commands requiring synchronization appear in chapter 1. See "Synchronization" in
the GPIB Programmer's Guide for additional information abaout the *OPC command and the *OPC?
query.
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