Operating Manual Vol 1 - ES Documentation

Digital ModulationSMIQ(TRIGGER...) TRIGGER SOURCE Selection of trigger sourceEXT An external trigger signal can be fed in atTRIGIN of connector PAR DATA at the rearof SMIQ. With the active edge, a datasequence is started from the data generatormemory.INT With INT selected, a trigger event can bemanually executed by EXECUTE TRIGGER.IEC/IEEE-bus :SOUR:DM:TRIG:SOUR EXTEXT TRIGGERDELAYInput value of number of symbols by which anexternal trigger signal is delayed before it starts thedata sequence in the data generator. A synchroneitywith the DUT or other units can thus be achieved.IEC/IEEE-bus :SOUR:DM:TRIG:DEL 3EXT RETRIGGERINHIBITInput of number of symbols for which each newtrigger event is inhibited during MODE RETRIG aftera trigger signal.During MODE RETRIG, each new trigger signalrestarts the data sequence in the data generator.This restart can be inhibited for the entered numberof symbols. The entry of 1250 symbols, for example,causes new trigger signals to be ignored for theduration of 1250 symbols after execution of a triggerevent.IEC/IEEE-bus :SOUR:DM:TRIG:INH 1250CLOCK...Opens a window for selecting the clock source and for setting a delay.FREQ100. 000 000 0 MHzLEVELPEP-30.0 dBm- 27.6 dBmΠ/4DQPSKFREQUENCYLEVELANALOG MODVECTOR MODDIGITAL MODDIGITAL STDLF OUTPUTSWEEPLISTMEM SEQUTILITIESSTATESOURCE...SELECT STANMODULATION.SYMBOL RATEFILTER...CODING...TRIGGER MODEXECUTE TRITRIGGER...CLOCK...CLOCK SOURCE INT COUPLED EXTMODE SYMBOL BITDELAY0.00 SymbFig. 2-66DIGITAL MOD - CLOCK, SMIQ equipped with option Modulation Coder SMIQB20 andoption Data Generator SMIQB111125.5555.03 2.110E-9