R&S SGT100A User Manual page 567

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R&S SGT100A
Table 15-1: Synchronization using *OPC, *OPC? and *WAI
Com-
mand
*OPC
*OPC?
*WAI
Command synchronization using *WAI or *OPC? is a good choice if the overlapped
command takes only little time to process. The two synchronization commands simply
block overlapped execution of the command. Append the synchronization command to
the overlapping command, for example:
SINGle; *OPC?
For time consuming overlapped commands, you can allow the controller or the instru-
ment to do other useful work while waiting for command execution. Use one of the fol-
lowing methods:
*OPC with a service request
1. Set the OPC mask bit (bit no. 0) in the ESE: *ESE 1
2. Set bit no. 5 in the SRE: *SRE 32 to enable ESB service request.
3. Send the overlapped command with *OPC .
4. Wait for a service request.
The service request indicates that the overlapped command has finished.
*OPC? with a service request
1. Set bit no. 4 in the SRE: *SRE 16 to enable MAV service request.
2. Send the overlapped command with *OPC?.
3. Wait for a service request.
The service request indicates that the overlapped command has finished.
Event status register (ESE)
1. Set the OPC mask bit (bit no. 0) in the ESE: *ESE 1
2. Send the overlapped command without *OPC, *OPC? or *WAI.
User Manual 1176.8674.02 ─ 07
Action
Sets the Operation Complete bit in the ESR
after all previous commands have been exe-
cuted.
Stops command processing until 1 is
returned. This occurs when all pending opera-
tions are completed.
Stops further command processing until all
commands sent before *WAI have been exe-
cuted.
Remote Control Basics
Programming the controller
●
Setting bit 0 in the ESE
●
Setting bit 5 in the SRE
●
Waiting for service request (SRQ)
Send *OPC? directly after the command
whose processing must be terminated before
other commands can be executed.
Send *WAI directly after the command whose
processing must be terminated before other
commands are executed.
Annex
536