Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!pasteur!agate!labrea!decwrl!ant.dec.com!janzen
From: janzen@ant.dec.com (Tom LMO2/O23 296-5421 ECL MSI Test)
Newsgroups: comp.sys.amiga
Subject: amiga oscilloscope
Message-ID: <8901300308.AA16670@decwrl.dec.com>
Date: 30 Jan 89 06:02:00 GMT
Organization: Digital Equipment Corporation
Lines: 16

I don't know anything about any particular amiga oscilloscope product.
However, I would like to make a general remakr about sampling oscilloscopes,
which I use in my daily work.  The sample conversion time places no obvious
limitation on the speed of signals the scope can sample.  The Tektronix
7854, until a year ago the highest performance (non-josephson) scope on
the market, in terms of sampling signals of many Giga Hertz bandwidth,
converts a sample in roughtly 20 microseconds.  Because the samples repeat,
the analog bridge can sample and "hold" a small portion of signal
(some picoseconds long) and hold it for long enough for the mainframe
sweep to come into position for the next ample
sweep to come into position for the next sample, and convert it to digital
form.
Newer scopes may use 8-bit flash convertors, which are much faster, but this
affects only one-shot non-repeating events, which you can't see at all
on ordinary analog scopes without a long-persistance or storage screen.
Tom Janzen Digital Equipment Corp 111 Locke Marlbor MA 01752