How is that a problem? Thank your luck for sparing you that nonsense!
I can probably count the number of times I wanted to use DPO (analog
persistence) on one hand.
Maybe it is just the kind of work that I do (AC input SMPS), but
having a bunch of traces on screen really doesn't help me most of the
time.
It just gets all washed out what with AC ripple and EMI jitter, and
you can't tell which edges belong together in one sweep.
You can't even tell what's noise on one sweep and what's variations of
different sweeps.
You can't tell if there is the odd single unusual pulse, or if one
sweep has all unusual pulses.
In short, it's totally useless. Yes, it compresses a lot of
information into one picture, but to the point where you can not
distignuish any of it (without further analysis).
It is like printing a book on semi-transparent paper and trying to
read the next 50 pages all at once.
I remember when the Agilent rep demonstrated the (then new) S series
and there was no way to disable DPO mode (except by setting a
ridiculous holdoff).
That's a dealbreaker for me right there. You can only drive that
keysight 3000x in single shot mode, annoys the hell out of me. Same
for the TDS3000 series.
If I want an analog display, I go and get a bloody analog scope, thank
you very much.
Limited single shot capability was a _weakness_ of analog scopes.
It's a physical limitation the the phosphor that it lights up for a
certain amount of time and then gradually decays, definitely NOT
something to strive for.
ST
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On Sat, Jun 30, 2018 at 9:14 PM, Tam Hanna <tamhan@...> wrote:
There, however, a new problem rears its head - total lack of
DPO/InstaVu.
Tam
