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| Simon:
I am trying to experiment with analysing square waveforms with FFT in LTSpice by analysing the pulse waveforms with various rise and fall times. But there seems to be a minimum rise time of 50µs. Even if I set rise and fall times to "0" I get a slope of about 50µs. Is this how it works? |
| T3sl4co1l:
A zero, null or absent parameter, that must be nonzero, is simply given its default value. Tim |
| Simon:
Well in theoretical land a 0 rise/fall time can be done. So are you saying that 50µs is the fastest transition I am allowed or that it is the default because 0 is not acceptable? |
| Simon:
hm, setting 1ns I get practically straight edges. |
| Simon:
1ps produces a giberish waveform :) |
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