----- Original Message -----
From: "Austin Franklin" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, January 12, 2001 8:10 AM
Subject: RE: filmscanners: Re: So it's the bits?
Austin:
I Have been following this thread with some intrest and your example below
ties the thread up into a nice clean package.
Thanks for the use of your knowledge and expertise.
John Horton
<snip>
> Yes, it appears you are confused about what DMax is. There are two
> 'properties' to the system we are discussing. One is the voltage range,
and
> as you say, that, technically, could be represented by any number of bits.
> Second is the ability to discriminate within that voltage range, which is
> 'resolution'....and that is what DMax is. DMax is relative in and of
> itself. A voltage range of +1V and -1V (2V range) with 2 bits (4 values)
> has the exact same DMax as a voltage range of +20V and -20V with 2 bits,
yet
> their respective ranges are different, and each bit of each range
represents
> a completely different voltage. In one it is .5V, and in the other it is
> 5V.
>
> The output data from the scanner does not care a wit about voltages. What
> it cares about is the ability to 'discriminate' as many values as possible
> (DMax), and they are all relative.
>
>
