17 Aug
2015
17 Aug
'15
8:37 p.m.
On 2015-Aug-17, at 3:32 AM, Noel Chiappa wrote:
Well, a DSO (i.e. any modern scope) obviates the need to create scope loops in servicing
as we used to have to do with analog/non-storage scopes.
I suffered with a low-end Tek analog scope until a few years ago; have been using a Tek
DSO for the last few years.
While there are occasions I'd like to have an LA, I can't say there are any
instances where I've had to have an LA (I still don't have one).
From:
drlegendre
Sigh.. and here I sit, yet again, with neither a
logic analyzer
I've bought Tek 1240's (which are really nice units, although of course
without the capabilities of today's - but still a lot more powerful than the
earliest LA's) on eBay for as little as $25 (albeit without leads), and I
gather there are modern units which plug into a PC with a UCB port for not
much more money.
Yes, a lot of the older machines were built without benefit of them (pretty
much all their builders had was 'scopes), but there are so many things where
one cannot easily create a 'scope loop, and for investigating those, a logic
analayzer is the perfect tool.
It's just a critical tool to have if one is going to _repair_ old computers -
only slightly less critical than a VOM. No ifs, ands or buts. From a usefulness perspective I'd get a DSO long
before an LA.