>I wonder, have any of you seen an analog scope (not analog storage)
>that has a horizontal timebase of less than 50 ms/div?

Yep, both mine (Tek 556 and Tek 7B53 timebase) go to 5 s/div.


>And if so, do you find it useful at such a timebase?

Sometimes.  If I really needed to examine something at 5 s/dev, I'd
probably dig up a chart recorder, stick a camera on 'B' in front of the
scope, or graph it using a meter to make the measurements at regular
intervals.


>And at last, a question for all you folks out there.
>Why do they make scopes with for instance a maximum
>sample rate of 100 MS/s sample rate and 400 MHz analog BW?
>
>What's the use?

Sampling repetitive signals.  Try an analog sampling scope--some might need
100k or more input cycles to display one trace.  But that doesn't take long
at 1 GHz or better...


>I'm aware that these scopes usually have a way of displaying
>higher frequency signals by "skewing" the sample points, and thereby
>building a picture of the signal, but this is in my opinion not very useful
>unless you have a periodic signal. And this is certainly not always the case.

How many signals at 1GHz or better would be non-repetitve?


newell