Wagner is right !!!!
You can have a tons of data captured pretty fast, if the display does not
let you update fast enough.
Did You ever try to see CD player eye-pattern signal ? You can clearly see
it with a 50 Mhz analog scope, but
my 100 MHz 1Gs/s Tektronix DSO can not display that signal at all.
Peter

----- Original Message -----
From: Brian Gregory <briang@CIX.COMPULINK.CO.UK>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, April 07, 2000 4:41 PM
Subject: Re: LCD Osciloscope


> In-Reply-To: <38EDE935.BC35C550@ustr.net>
>
> Wagner Lipnharski <wagner@USTR.NET> wrote:
> > LCD technology is basically slow, so for high frequencies they are
> > forced to work with memory. The customer thinks it is an advantage to
> > have memory or delayed display, but in true there is no other way to
> do
> > that.  You can't possible "see" a 50 MHz signal in real time on a LCD
> > screen.  Steve, to mess with your words, I would change the phrase "OK
> > (specially lower frequencies)." to "OK (only in lower frequencies)"...
> > :)  In the high frequency real time world there is nothing that can
> > substitute (until now) the good and old CRT, I am wrong?
>
> Wrong and very confused.
>
> The LCD is only a display device it can be as slow as you like as long
> as the
> circuit that's sampling the input signal and storing the readings in
> memory
> goes fast that's all it takes.
>
> Brian Gregory.
> briang@cix.co.uk