21 Jul
2000
21 Jul
'00
5:17 a.m.
hi,
think of an oscope as a graphic voltmeter that plota against time.
the X axis is volts and Y axis is time.
That is along way from troubleshooting with one. To trouble shoot with one
you really need to have some idea of waht you can expect to see vs what
you actually saw. Most prints do not automatically give you that.
While a scope is handy, for fixing machines that were formerly working a
DMM and logic probe tend to be more useful. Exceptions exist like setting
hammer flight time on charaband printers or slice levels and timing for
older core stacks. The latter being adjustments rather than fixed by rules
of logic.
Allison
On Fri, 21 Jul 2000, Bill Sudbrink wrote:
I was going to post this request sometime, John
Fousts
post has inspired me to do it now. Anyway, I have also
recently acquired an oscilloscope (Tektronix TDS 3012)
and, while I have all the documentation and some notion
of what an oscilloscope does, I really don't know how to
bring it to bare against the several dead/flakey systems
currently in my possession. I hope this message will
start a "how to use an oscilloscope to diagnose vintage
hardware problems" thread.
Thanks,
Bill
(by the way... bills(a)adrenaline.com is now my email address)