On Fri, Apr 4, 2025 at 11:34 AM, John Woodgate wrote:
I understand, but LTspice Help doesn't even mention the possibility of a print step parameter.
It does, but it is easily missed:
Syntax:?.TRAN <Tstep> <Tstop> [Tstart [dTmax]] [modifiers]
????????.TRAN <Tstop> [modifiers]
The first form is the traditional .tran SPICE command. Tstep is the plotting increment for the waveforms but is also used as an initial step-size guess. LTspice uses waveform compression, so this parameter is of little value and can be omitted or set to zero.
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In the Simulation Command editor, it labels it "Tprint" rather than "Tstep".? It is the same thing.
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I had forgotten that LTspice can use that parameter as a first-guess for the internal Timestep.
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IMO, it is not because of waveform compression that LTspice otherwise does not use Tprint or Tstep.? It's because that parameter was the step size for the line-printer output, which LTspice does not do.
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Andy
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