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Re: [Help-gnucap] howto use different phase and frequency in sources for

From: al davis
Subject: Re: [Help-gnucap] howto use different phase and frequency in sources for transient analysis?
Date: Mon, 19 Oct 2009 17:54:43 -0400
User-agent: KMail/1.12.2 (Linux/2.6.26-1-amd64; KDE/4.3.2; x86_64; ; )

On Saturday 17 October 2009, Rubén Gómez Antolí wrote:
> I need to specify different phases in sources in this way:
> I1 phase=-10 freq=60
> I2 phase=150 freq=180
> I3 phase=-56 freq=300
> SIN sources not admit phase option.

> I try with generator function: 
> .gen ampl=10 phase=-10 freq=60
> I1 n1 n2 generator(1)
> .gen ampl=15 phase=150 freq=180
> I1 n2 n3 generator(2)
> etc.
> but I see that generator don't work in this way.

You are correct .. It don't work in this way.
> I look for in the net without sucess. I see that in AC
>  analysis is possible, but I need to do in transient
>  analysis.
> There are anyway to do this?

What is the meaning of phase in transient analysis, when you 
have different frequencies?  The phase relationship between them 
is always changing.  I suppose it could be the phase at time=0, 
and translate to delay.

What you do have is "delay".  You can get what you want with SIN 
source, specifying a delay in seconds.

try delay={(phase/360)/frequency}

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