Remote Commands
R&S
®
Spectrum Rider FPH
283
User Manual 1321.1011.02 ─ 06.00
13.5
Command Sequence and Command Synchronization
What has been said above makes clear that all commands can potentially be carried
out overlapping. In order to prevent an overlapping execution of commands, one of the
commands
*OPC, *OPC? or *WAI
must be used. All three commands cause a cer-
tain action only to be carried out after the hardware has been set. By suitable program-
ming, the controller can be forced to wait for the respective action to occur.
For more information, see
Table 13-2: Synchronization using *OPC, *OPC? and *WAI
Command
Action
Programming the controller
*OPC
Sets the Operation Complete bit
in the ESR after all previous com-
mands have been executed.
●
Setting bit 0 in the ESE
●
Setting bit 5 in the SRE
●
Waiting for service request
(SRQ)
*OPC?
Stops command processing until
1 is returned. This is only the
case after the Operation Com-
plete bit has been set in the ESR.
This bit indicates that the previous
setting has been completed.
Sending
*OPC?
directly after the
command whose processing
should be terminated before other
commands can be executed.
*WAI
Stops further command process-
ing until all commands sent
before
*WAI
have been executed.
Sending *
WAI
directly after the
command whose processing
should be terminated before other
commands are executed.
For a couple of commands, the synchronization to the end of command execution is
mandatory in order to obtain the desired result. The affected commands require either
more than one measurement in order to accomplish the desired instrument setting
(e.g. auto range functions), or they require a longer period of time for execution. If a
new command is received during execution of the corresponding function, this may
either lead to either to an aborted measurement or to incorrect measurement data.
The following list includes the commands, for which a synchronization via
*OPC, *OPC? or *WAI
is mandatory:
Table 13-3: Commands with mandatory synchronization (overlapping commands)
Command
Purpose
INIT
start measurement (sweep)
INIT:CONT OFF
Set to single sweep
CALC:MARK:FUNC:xx?
All Marker function queries
13.6
Remote Control - Commands
The following chapters provide a detailed description of all the remote control com-
mands currently available for the R&S Spectrum Rider and its firmware options.
Remote Control - Commands