i'm an engineer who got sidetracked into software early. signal to noise ratio is the noise floor below some reference level. headroom has been the amount above that reference level where something breaks. the sum is the dynamic range. that is the same definition used by NASA for specifying the imaging sensors in the Hubble and James Webb Space telescopes. time variation has nothing to do with the definition.
Herb.... ----- Original Message ----- From: "Bob Blakely" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, December 29, 2003 10:23 AM Subject: Re: Dynamic Range > I have no idea what your background is, but if you are educated in this area > , and it will help you, speak to me as though I was an engineer with about > 30 years experience in this and related areas, because I am.
