Remote Control
R&S
®
NRT2
106
User Manual 1178.5550.02 ─ 04
Usage:
Query only
*OPC
OPeration Complete
Sets bit 0 in the event status register when all preceding commands have been execu-
ted. This bit can be used to initiate a service request.
*OPC
must be sent at the end of
a program message.
The query form returns a "1" when all previous commands have been processed. It is
important that the read timeout is set sufficiently long.
Since
*OPC?
waits until all previous commands are executed, "1" is returned in all
cases.
*OPC?
basically functions like the
does not return a
response.
*OPC?
is preferred to
*OPC?
, the execution of commands can be
queried from a controller program before new commands are sent. This prevents over-
flow of the input queue when too many commands are sent that cannot be executed.
Unlike
*OPC?
must be sent at the end of a program message.
*OPT?
OPTion identification query
Returns a comma-separated list of installed options.
Usage:
Query only
Manual operation:
See
*PMC
Purge macro command.
Usage:
Event
*PRE
<register>
Parallel poll Register Enable
Sets the parallel poll enable register to the specified value or queries the current value.
Parameters:
<register>
Range:
0 to 255
*RST:
0
Common Commands
