Stage scenery:

A) Tektronix Model 284 TD/tunnel-diode fast-pulser, claimed 70 PICO-second t_r aka Rise-time.
B) Tek 7854 nom. 400 MHz scope (first Successful design w/BOTH fast single-shot analogue and with digital storage, analysis etc.)
(Mine specs out at ~500 MHz. Fastest time-base has a "200 Psec/DIV" position.

One Looks: at the display (..and can factor-in the 70 pSec source) displayed at 550 pSec scope t_r
One Sees! that Half-a-Nanosec step-change, occurring over a couple cm. of the 10-cm. sweep length.


Por moi then, it's just a lot more stirring of the analytical-Soul on Visual -vs- that piece of wire-in-hand.
'Course the equipment cost is not insignificant, compared with "zero".. .... details, details.
But, either Will Do ... to bring home the Mystery that
...
[there is Anything at All which appears through 'the sides?' of our goldfish bowl.]
Message to Cosmos: Encore! Encore!

When I thought to do some Audio flogging (so's to get my Own better gear) I got a demo==call-it-New 503,
a paltry 500 KHz (!) BW, but with the display, triggering etc. of Tek built-in.

Lab rife with 545s (maybe -Bs also, but not in Our bailiwick.) So I arabesqued the vacuum-tube era ..never having seen, turned knobs of the 547, as progress -->Happened (well, at Tek anyway.)
(Even at Lab when first I arrived, the Electron Synchrotron had execrable == pre-Tek scopes) I recall Our first shiny 545 and Oohh ing over a Real "time base" (not yer Gramma's Theremin-with-pots/potentiometers.)

I wonder if you Can become conversant with electronics ... via simulators as so-fit-the Game-mentality now purporting to render obsolescent: EXPERIMENT!
Believe that baby already went out with other shades of bath-water

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Get OFF my transistorized-LAWN! {{sigh}}