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On Jun 4, 2024, at 22:58, Harvey White via groups.io <madyn@...> wrote:

?Perhaps I can help a little, comparing, say a 7904 and a TDS540 (and
leaving out the 7104 series)

Analog scope pros:

even frequency response up past the scope's bandwidth limit, (think
ripple of a sharp cutoff filter)

relatively inexpensive without too terribly many nasty parts (that can vary!).

available in 7000 series with lotsa plugins.

you see everything that happens. Analog scopes never blink.

Analog scope cons:

unless you have a storage scope, absolutely miserable to capture single shot and low rep-rate events.

storing data from the scope can be tricky, but possible.

not the latest technology (matters to some)

no color displays I know of.

Digital scope pros:

excellent for low rep-rate single shot events within limits

indefinite storage

easy to get data from

additional waveform metrics and measurements

"latest technology"

can have color displays.

Digital scope cons:

Internal processor makes them complicated

internal processor may be difficult to upgrade, both hardware and
software

requires a different set of skills to repair.

data not always available to repair. Many parts obsolete or may have a limited lifetime.

innards of scope remain a mystery to most (if was even available).

may not be modularized (a la 7000 series), so may be less versatile if that's needed.

How's that?

Harvey


storage scopes have a limited storage time and a limited writing rate.

On 6/4/2024 9:16 PM, Radu Bogdan Dicher wrote:
Eric,
Thank you for the input. I'll likely get both and keep one. The 11401 "doesn't start," which in my experience is more good news than not. If I can repair it and let it go to help with the investment in both, that would be a great path forward.

They seem to be fairly similar units, but what I'm seeing so far is that the DSA is the higher tier unit of the two (or maybe just age?).

I'm still humbly looking for some education on the merits and maybe downsides of digitizing scopes. I've just not considered them this far.
Radu.

On Tue, Jun 4, 2024 at 4:45?PM Eric via groups.io <> <ericsp@...> wrote:

Bias to the dsa if you can they tend to me MUCH more reliable then
the 11,000 series. The 602 is 1 ghz up to 12 channels of 300mhz.
Usual fault in the dsas is you might need to resolder the scams
these have known issues around the power pins. Not a huge job but
a huge board and some what tedious.


Just my 2 cents worth.


On Tue, Jun 4, 2024, 9:55 AM Radu Bogdan Dicher via groups.io
<> <vondicher@...> wrote:

I have the opportunity to grab, likely very affordably, an
11401 and/or a DSA 602A (the latter coming with a couple of
11A34a and one 11A72 plugs), and I've never - yet - considered
getting a digitizing scopes, which I'm not very familiar with.

One feature I am aware of is outstanding risetime performance.
But I'd appreciate a bit of education on if/why I'd need one
of those at my bench. Where my main scope is an HP 54522A
which may soon be replaced with a TDS754D (which I hope to
upgrade to 784D), a 7104 analog, a 7704A, 453A, etc.

Thank you!
Radu.