Rohde & Schwarz SMB 100a - Page 291

R&S SMB Command Description
1407.0806.32 6.99 E-2
TRIGger Subsystem
The TRIGger system contains the commands for selecting the trigger source for the RF and LF sweep.
The trigger input connector is configured in the SOURce:INPut subsystem.
The trigger system of the R&S Signal Generator is a simplified implementation of the SCPI trigger
system. The TRIGger system differs from the SCPI system as follows:
- No INITiate command; the instrument behaves as if INITiate:CONTinuous ON were set.
- Under TRIGger several sweep subsystems exist.
Other commands associated with the trigger system of the R&S Signal Generator can be found in the
modulation and RF signal subsystems.
Command Parameters Default
unit
Remark
TRIGger0[:SWEep]:SOURce AUTO|IMMediate | SINGle|BUS | EXTernal | EAUTo
TRIGger:LFFSweep:SOURce AUTO|IMMediate | SINGle|BUS | EXTernal | EAUTo
TRIGger:FSWeep[:IMMediate] No query
TRIGger:FSWeep:SOURce AUTO|IMMediate | SINGle|BUS | EXTernal | EAUTo
TRIGger:PSWeep[:IMMediate] No query
TRIGger:PSWeep:SOURce AUTO|IMMediate | SINGle|BUS | EXTernal | EAUTo
TRIGger[:SWEep][:IMMediate] No query
TRIGger[:SWEep]:SOURce AUTO|IMMediate | SINGle|BUS | EXTernal
TRIGger0[:SWEep]:SOURce AUTO|IMMediate | SINGle | EXTernal|BUS | EAUTo
TRIGger:LFFSWeep:SOURce AUTO|IMMediate | SINGle|BUS | EXTernal
Both commands set the trigger source for the LF sweep (alias commands). The trigger is triggered
by the command :SOURce:LFOutput:SWEep[:FREQuency]EXECute.
The names of the parameters correspond directly to the various settings under manual control. SCPI
uses other names for the parameters; these names are also accepted by the instrument. The SCPI
names should be used if compatibility is an important consideration. An overview of the various
names is given in the following table:
R&S name SCPI name Command under manual control
AUTO IMMediate Auto mode
SINGle BUS Single mode.
EXTernal EXTernal Ext Single and Ext Step mode. The
command LFO:SWEep:MODE is used to
select between the two sweep modes.
Parameters:
AUTO | IMMediate
The trigger is free-running, i.e. the trigger condition is fulfilled continuously. As
soon as one sweep is finished, the next sweep is started.
SINGle
One complete sweep cycle is triggered by the IEC/IEEE-bus commands
.:LFOutput:SWEep:EXEC or *TRG. The mode has to be set to AUTO
(:SOURce:LFOutput:SWEep:MODE AUTO).
EXTernal
The sweep is triggered externally via the INST TRIG connector.