Re: Basic oscilloscope recommendations

On Jun 14, 8:01 pm, mike <spam...@xxxxxxxxx> wrote:

The absolutely positively most important thing is to define with
precision what you want your scope to do. Your current definition
I interpret to take about 3 orders of magnitude less memory depth
than my interpretation of your original requirement.

How much of the signal do you need to see on the screen at one time from
one acquisition? And how fine a detail do you need to see when you
magnify it? That determines what you need from a digital scope.

Second thing to worry about is how much your time is worth.
If you make money with your time, and your time gets $100 an hour,
your break-even point is 20 hours. That's a no-brainer.
If lack of measurement delays a project, it's mismanagement.
A system that's difficult to use on an occasional problem is
frustrating. A system that won't easily do your primary requirement
is EXPENSIVE. Stated another way, look at the life-cycle costs
of the project, not just the $$$ spent on a scope.


I apologize for being unclear, I am trying to be as precise as I can!
The signal I expect is around 10-20 ms duration. It repeats every 1
second (approximately) but I only care about the first 10-20 ms. I
want around 2us resolution but probably 10us is more than adequate.
The scope will sit in a corner and display these types of waveforms
for the rest of its life and nothing else.

I will look at the waveforms - but hopefully not for the rest of my
life ;) My viewing pleasure is paramount in this purchase - I would
like the 10-20ms of interest to be displayed brightly for 1 second, or
longer if necessary, until the next 10-20 ms of interest comes along.

My current (analog) scope triggers and shows the 10-20 ms but then
goes dark for the remaining 980-990 ms.

.

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