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Subject: Re: Oscilloscope purchasing

Date: 10/27/00 at 7:27 PM
Posted by: Ray
E-mail: rrogers@plaidheron.com
Message Posted:

In Reply to: Oscilloscope purchasing posted by Jim on 10/25/00 at 9:07 PM:

Rule of Thumb: (Rise Time)(Banwidth)=.35 so 20mHz has a rise time of (.35/20)*10^-6=17.5nsec. Pulses shorter than this will get severly distorted.
One can generate refinements and exceptions to this but don't bother.
As to your application; it depends:):) Harry Truman said the only thing he wanted was a "one handed Economist" (i.e. one this hand blah... on the other hand bleh...)
Your SCR might fire off if exposed to transients shorter than this; although the current ones might have protection. It has been quite a few years so I don't remember the protection circuits that will cure this (if it exists).
I think that this is about your only obvious problem that might occur. Of course I don't know about the rest of your application.
I will let you know if anything else occurs to me.

Ray


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