SPICE “V” element with “PULSE” option generates a pulsed voltage waveform (single pulse or periodic).
The syntax of “PULSE” is as follows.
Berkeley SPICE2, HSpice, PSpice, XSpice, LTspice
Vxxx n+ n- PULSE( V1 V2 [TD] [TR] [TF] [TPW] [TPER] [NPER] )
V1:Initial Value [V]
V2:Pulsed Value [V]
TD:Delay Time [s]
TR:Rise Time [s]
TF:Fall Time [s]
TPW:Pulse Width [s]
NPER:Number of Times
V1 N001 0 PULSE(0 3.3 1m 10n 10n 6u 10u 1000)
The symbol of LTspice’s “V” element with “PULSE” option is “voltage” which is in “C:\Users\Username\Documents\LTspiceXVII\lib\sym” directory. If you want to set the parameters of that by GUI, click “Advanced” button on “Component” menu window and check “PULSE(V1 V2 Tdelay Trise Tfall Ton Period Ncycles)” in “Functions” setting.