Re: gEDA-user: How to?

["harry eaton" <bumpelo@xxxxxxxxxxx>]

The easiest thing to so for a 5 cycle sinewave
in SPICE transient analysis is to have a SIN
transient source and a PWL gate to it. Use a
poly controlled source to take the product of
the two. Set the PWL source to zero when you
want the sinewave gone and 1 when it is active.

vs 1 0 0 sin(0,1,1e6)
vp 2 0 0 pwl(0 0 5u 0 5.001u 1 10u 1 10.001u 0)
e1 3 4 poly(2) 1 0 2 0 0 0 0 0 1

makes the signal you want between nodes 3 and 4.

h.