[sdiy] Simple Scope Question

[Magnus Danielson]

From: harrybissell <harrybissell at prodigy.net>
Subject: Re: [sdiy] Simple Scope Question
Date: Fri, 21 Jan 2005 19:33:46 -0800
Message-ID: <41F1C99A.3D00A9FA at prodigy.net>

> Magnus Danielson wrote:
> 
> > A good beginners scope should have these properties at least:
> > 10-20 MHz bandwidth
> > 2 channels
> > Alternate/add (many also have chop, but that is rarely very usefull IMHO).
> > X/Y-mode
> > Extra trigger input is a plus.
> > Inversion of signal is a plus.
> >
> 
> "Chop" rarely useful ???   I almost never use Alternate sweep.  Chop shows
> the signals in real, relative time.  Alternate shows them every other
> sweep... ok for repetitive signals (like maybe ramp and pulse wave ?) but for
> all other signals I use chop

OK, let's just say that the chop I've seen been not very usefull since they
have been at too low frequencies and that ain't usefull. So, what I meant to
say was that chop is usefull when it runs at sufficiently high frequency.
However, I don't recall the chop-frequency being listed anywhere, so it is hard
to give general advice about it.

Cheers,
Magnus