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1. LF: Re: RE PICs and DDS etc. (score: 1): Author: "Alberto di Bene" <[email protected]>; Date: Wed, 21 Mar 2001 13:59:06 +0100; To avoid panic amongst QRS users : the next version will compensate for the changing value of light speed when calculating the length of a dot ;-) Rik You come second, Rik... Argo has already a buil; /rsgb_lf_group-archives/html/rsgb_lf_group/2001-03/msg00099.html (9,139 bytes)
2. LF: Re: RE PICs and DDS etc. (score: 1): Author: "Alberto di Bene" <[email protected]>; Date: Wed, 21 Mar 2001 11:16:37 +0100; [snip] The problem is the discrete time the DDS uses. The high order bit only changes at the clock edges. The result is a square wave with heavy phase jitter. For example, draw a sine wave (3 waves); /rsgb_lf_group-archives/html/rsgb_lf_group/2001-03/msg00109.html (9,544 bytes)
3. Re: LF: Re: RE PICs and DDS etc. (score: 1): Author: "Klaus von der Heide" <[email protected]>; Date: Tue, 20 Mar 2001 20:41:12 +0100; Hello Alberto, hello all, I thought again and, yes, the high order bit of the phase accumulator is not the squared up version of the sine output, but, after the phase accumulator, a DDS has a sine lo; /rsgb_lf_group-archives/html/rsgb_lf_group/2001-03/msg00130.html (10,071 bytes)
4. LF: Re: RE PICs and DDS etc. (score: 1): Author: "Alberto di Bene" <[email protected]>; Date: Tue, 20 Mar 2001 19:02:46 +0100; NO Think again, the high order bit of a DDS output is very definitely not a squared up version of the fundamental ! Used on its own it would have a spectrum not totally unlike noise. I thought again; /rsgb_lf_group-archives/html/rsgb_lf_group/2001-03/msg00134.html (9,592 bytes)

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