Agilent 33120A User's Guide

Chapter 4 Remote Interface ReferenceTriggeringœ To ensure synchronization when the Bus source is selected, send the*WAI (wait) command. When the *WAI command is executed, thefunction generator waits for all pending operations to complete beforeexecuting any additional commands. For example, the followingcommand string guarantees that the first trigger is accepted andexecuted before the second trigger is recognized."TRIG:SOUR BUS;*TRG;*WAI;*TRG;*WAI"œ You can use the *OPC? (operation complete query) command or the*OPC (operation complete) command to signal when the burst orsweep is complete. The *OPC? command returns “1” to the outputbuffer when the burst or sweep is complete. The *OPC command setsthe “operation complete” bit (bit 0) in the Standard Event registerwhen the burst or sweep is complete.TRIGger:SOURce?Query the present trigger source. Returns “IMM”, “EXT”, or “BUS”.TRIGger:SLOPe {POSitive|NEGative}Select the polarity of the Ext Trig terminal. If you select “POS”, thepolarity of the Ext Trig terminal is the same as described on page 102.If you select “NEG”, the polarity is the opposite of what is described.The default is Positive. [ Stored in volatile memory ]4TRIGger:SLOPe?Query the present polarity of the Ext Trig terminal. Returns “POS” or “NEG”.*TRGTrigger the function generator from the remote interface. For RS-232operation, make sure the interface is in the remote mode by sending theSYST:REM command.187