HP 53150A Series Programming Manual page 151

COMMAND
RELATED
FRONT-PANEL
KEYS
COMMAND
QUERY RESPONSE
RELATED
FRONT-PANEL
KEYS
NOTE
Chapter 4 Command Reference
Common Commands
*OPC
(Operation Complete Command)
*OPC
This event command enables the OPC bit (bit 0) in the Standard Event
Status Register to be set when a triggered action is complete. See the
section titled "Standard Event Status Register" on page 3-30 of this guide
for a detailed description of the Standard Event Status Register's
Operation Complete bit.
This event command is "disabled" by *CLS, *RST, power-on, or upon the
transition of the measurement cycle from measuring to idle.
This event command has no query form.
See the section titled "Using the *OPC Command to Assert SRQ" on
page 3-50 for an example that uses this command.
None
*OPC?
(Operation Complete Query)
*OPC?
This query causes the instrument to place a response in the output queue
when a triggered action is complete. This allows synchronization between
a controller and the instrument using the MAV bit in the Status Byte
Register. (Note that this query does not actually "read" a state, as most
queries do.)
See the section titled "Using the *OPC? Command" on page 3-49 for an
example that uses this command.
Single ASCII-encoded byte, 1.
None
The *OPC? query does not in any way affect the OPC bit in the Standard
Event Status Register.
Programming Guide 4-51