On Sunday 28 January 2007 08:57, Cameron Kaiser wrote:
> I've been offered a Tektronix 422 oscilloscope (price
is under
> negotiation). Is this a decent scope or a piece of
junk? I'm not very
> experienced with oscilloscopes, but I want to get
familiar with them
> and this one was not disastrously large.
This is a dual trace 15MHz scope. It would be O.K. for low
speed requirement
applications.
In measuring/observing signals, one has to take into
consideration rise and
fall times, glitches, phase, etc. of the signal - so it's
usually best to
have a scope that's about 10X the speed of the frequency
you're interested in
observing.
For most vintage work you'd be better off with the readily
available and
inexpensive TEK 4x5 (x=6,7,8) series. All are portable,
dual-trace, have
delayed sweep, and reasonable differential capability (handy
for core memory
scoping).
Cheers,
Lyle
--
Lyle Bickley
Bickley Consulting West Inc.
Mountain View, CA
http://bickleywest.com
"Black holes are where God is dividing by zero"
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