21 Feb
2016
21 Feb
'16
3:19 a.m.
There is another option to all this. You could use a modern 16 or 24 channel logic
analyzer. I have in my "bag" a Saleae logic16. They have a new version called
the pro that even does some scope like signal analysis.
Anyway, it was invaluable working on my Scelbi when troubleshooting because it hooks right
up to my MacBook and allows me to store entire runs of the system with gigabytes of
capture. I was tracking down a wonky step process where the CPU seemed to auto advance
when jamming instructions in if I waited more than a few seconds between steps. Having a
long running capture with something quick to setup really helps. It's also really
cool to watch the entire Sol-20 boot up process into Solos.
The other really useful thing about the Saleae logic stuff is size. It has come in useful
when I have to go somewhere other than my workbench to fix something because it's very
portable. It is very impractical for me to bring more than some hand tools, a hand held
DSO, my Saleae, a hakko desoldering gun and a portable temp controlled soldering iron to
some of the places I have had to do repairs on vintage tech.
Cheers,
Corey
corey cohen
u??o? ???o?
On Feb 21, 2016, at 3:46 AM, Curious Marc
<curiousmarc3 at gmail.com> wrote:
Like most others, the favorite is the one I use! So we are all biased by definition, and
I have an HP 1670G. In general I?d go straight to Tek for vintage scopes and HP for
vintage LAs, and be very somewhat leery about doing the opposite... I chose it because it
is small and portable, has a boatload of channels, the pattern generator, LCD color
screen, integrated keyboard, and mine had the 2M deep memory option (important). And I
collect HP instruments, so it fits right in. Rarer, more recent and expensive (but still
very affordable) than the dirt cheap CRT based 16xx series - has a hard disk and the
memory humph. I don?t use it often, but when I do it?s critical. It saved me on two
projects so far, developing my HP 7970 tape HP?IB driver and repairing my Documation card
reader (all documented on my YouTube videos if you want to get a feel for it). The one
downside is the lack of a touchscreen, you need a mouse and a lot of clicking around. The
15000/16000 series is better for that but a much larger unit, it would be a step up
though. If you want to save $ go in the other direction for the B&W 16xx series. At
their current price points, any of them is an absolute steal compared to what they can do
for you, and they are all perfectly usable. Good time to buy one.
Marc
From: cctech <cctech-bounces at classiccmp.org> on behalf of GerardCJAT
<gerardcjat at free.fr>
Reply-To: GerardCJAT <gerardcjat at free.fr>, "cctech at classiccmp.org"
<cctech at classiccmp.org>
Date: Saturday, February 20, 2016 at 1:31 PM
To: "cctech at classiccmp.org" <cctech at classiccmp.org>
Subject: Logic Analyser Polling ....
Which is your favourite ? Why you like it and would recommend it ? and .... How often
you use it ?