Carls original comment stated that PC processors do not do floating point
math very well...implying that there are processors that do it
better....thus my question.
----- Original Message -----
From: "Richard B Drake" <rich@w3zj.com>
To: <tentec@contesting.com>
Sent: May 17, 2001 17:05
Subject: RE: [TenTec] Re: TenTec Amateur Radio Digest V4 #145
>
> Even the worlds largest super computers can not to floating point
> arithmetic 100% accurately. This is because it is physically
> impossible to represent fractional values 100% accurately in
> binary. The more bits that are used in the process, the more
> accurate it becomes but complex calculations have to be planned
> out very carefully to minimize the error and in the end there is
> always some rounding required. When you are talking about needing
> accuracy in area of fractional parts per million (10 Hz out of
> 30MHz) a 32 or even 64 bit floating point processor is in over its
> head.
>
> ----
> 73, Rich - W3ZJ
>
> > -----Original Message-----
> > From: owner-tentec@contesting.com
> > [mailto:owner-tentec@contesting.com]On
> > Behalf Of Carl Hyde
> > Sent: Thursday, May 17, 2001 10:59 AM
> > To: W B Reese; tentec@contesting.com
> > Subject: Re: [TenTec] Re: TenTec Amateur Radio Digest V4 #145
> >
> >
> >
> > The drifting Mark is seeing in Digipan is due more to
> > the software and the
> > computers Real Time Clock that to the Omni V's drift.
> > Remember PC Processors
> > don't do floating point math very well.
> >
> > TT sets the offset to 600 Hz so just tune 600 away from
> > the point where the
> > other guys cw tone dissapears.
> >
> > Hell we've been sending and receiving CW with drifty
> > old tube radios with no
> > crystals since ham radio began. How accurate does it
> > have to be? Not as
> > accurate as it is.
> >
> >
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> >
> >
>
>
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