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Two things come to mind. The extremely fast & the extremely slow signals. The time base on the DSA is quicker then then time base on the 7104 so especially for edge work? the 7104 gets down to 200ps/div the DSA gets down to 50ps/div so quite a bit more zoom. This is sweeping way faster than the phosphor in a 7104 can react for brightness even with the MCP. Analog seems to top out at 1Ghz I am not aware of anything faster.

We have 110 Ghz of bandwidth in digital. Though that scope is a cool 1.5 Million US.

Zen

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Dave Daniel via
Sent: Wednesday, June 5, 2024 7:59 AM
To: [email protected]
Subject: Re: [TekScopes2] Digitizing scopes vs. DSOs, DPOs, etc.?...

That's a good summary. One aspect of DSOs that you didn't mention is aliasing.

DaveD
KC0WJN

==============================
All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================

> On Jun 4, 2024, at 22:58, Harvey White via <madyn=[email protected]> 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 <> <ericsp=[email protected]> 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
>>? ? <> <vondicher=[email protected]> 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.
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