Operating Manual Vol 1 - ES Documentation

SMIQDigital Standard PDC(CLOCK...) CLOCK SOURCE Selection of clock source.INT SMIQ uses internally generated clock signals.EXT An external symbol clock or bit clock is fed in atconnectors SYMBOL CLOCK or BIT CLOCK. Theclock synthesizer on the modulation coder issynchronized to this clock.The symbol rate has to be set with an accuracy of± 1 %.The polarity, the trigger threshold and the inputresistance of the clock inputs can be modified inmenu DIGITAL MOD - EXT INPUTS.IEC/IEEE-bus command :SOUR:PDC:CLOC:SOUR INTMODEDELAYSelection of clock for external clock signal.SYMBOL The external clock has to be a symbol clock.BIT The external clock has to be a bit clock.IEC/IEEE-bus command :SOUR:PDC:CLOC:MODE SYMBSetting the delay of generated modulation signal to anexternal clock.This can be used, for example, for synchronization with asecond unit to achieve time synchronization between themodulation signals of the two units.IEC/IEEE-bus command :SOUR:PDC:CLOC:DEL 0.5POWER RAMPCONTROL...Opens a window for setting the envelope control, especially for the rising andfalling ramp at the beginning and end of a slot.FREQPDC100. 000 000 0 MHzLEVEL -30.0 dBmPEP -27.4 dBmFREQUENCYLEVELANALOG MODVECTOR MODDIGITAL MODDIGITAL STDLF OUTPUTSWEEPLISTMEM SEQUTILITIESPHSIS95NADCPDCGSMSTATESET DEFAULTMODULATION... RAMP TIME2 SymbTRIGGER MODE RAMP FUNCTIOM LIN COSEXECUTE TRIG RAMP DELAY0.0 SymbTRIGGER.... RISE OFFSET0 SymbCLOCK... FALL OFFSET0 SymbPOWER RAMP C>SLOT ATTENUA0TCHFig. 2-189Menu DIGITAL STD - PDC - POWER RAMP CONTROL... , SMIQ equipped withModulation Coder SMIQB20 and Data Generator SMIQB111125.5555.03 2.287E-9