Operating Manual Vol 1 - ES Documentation

SMIQDigital Standard PHSCLOCK...Opens a window for selecting the clock source and for setting a delay.FREQPHS100. 000 000 0 MHzLEVEL -30.0 dBmPEP - 27.5 dBmFREQUENCYLEVELANALOG MODVECTOR MODDIGITAL MODDIGITAL STDLF OUTPUTSWEEPLISTMEM SEQUTILITIESPHSIS-95NADCPDCGSMSTATECLOCK SOURCE INT EXTMODULATION... MODE SYMBOL BITTRIGGER MODEEXECUTE TRIGTRIGGER....CLOCK...POWER RAMP C>SLOT ATTENUADELAY0.00 SymbDN1 2SYNCFig. 2-72Menu DIGITAL STD - PHS - CLOCK..., SMIQ equipped with Modulation Coder SMIQB20and Data Generator SMIQB11(CLOCK...) CLOCK SOURCE Selection of clock source.INT SMIQ uses internally generated clock signals.EXT An external symbol clock or bit clock is fed inat connectors SYMBOL CLOCK or BITCLOCK. The clock synthesizer on themodulation coder is synchronized to thisclock.The symbol rate has to be set with anaccuracy of ± 1 %.The polarity, the trigger threshold and theinput resistance of the clock inputs can bemodified in menu DIGITAL MOD - EXTINPUTS.IEC/IEEE-bus command :SOUR:PHS: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:PHS: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:PHS:CLOC:DEL 0.51125.5555.03 2.123E-9