Agilent 33120A User's Guide

Chapter 4 Remote Interface ReferenceSimplified Programming OverviewReading a Query ResponseOnly the query commands (commands that end with “ ? ”) will instructthe function generator to send a response message. Queries returneither output values or internal instrument settings. For example,the following statements executed from your computer will read thefunction generator’s error queue and print the most recent error:dimension statement"SYST:ERR?"bus enter statementprint statementDimension string array (80 elements)Read error queueEnter error string into computerPrint error stringSelecting a Trigger SourceWhen burst modulation or frequency sweep is enabled, the functiongenerator will accept an immediate internal trigger, a hardware triggerfrom the rear-panel Ext Trig terminal, or a software (bus) trigger.By default, the internal trigger source is selected. If you want thefunction generator to use the external source or a bus trigger, you mustselect that source. For example, the following statements executed fromyour computer will output a 3-cycle burst each time the Ext Trigterminal receives the rising edge of a TTL pulse:4"BM:NCYC 3""TRIG:SOUR EXT""BM:STAT ON"Set burst count to 3 cyclesSelect external trigger sourceEnable the burst mode137