Scope Hunting

[Buck Buchanan]

At 10:39 AM 6/25/98 -0400, List, Christopher wrote:
>probe and no manual - but I have a probe from my old scope. I haven't
>figured out how (or why) to use the delayed sweep on the second channel
>- so I don't know if that's working, but judging by the condition of
>everything else, I'd be surprised if it's not.

Hi Chris, Contrats on the new scope!

Delayed sweep is an awesome feature!  I wish I'd spent the money on a scope
that has it. (I cc'd the list on this so somebody who knows more about this
can fill in and/or correct me.)  

Why:  Say you have a data burst with 50 events (bits, cycles, whatever)
within it.  You want to look closely at event # 37.  With a regular scope,
you can really only see the entire burst on the screen (with low resolution
on the individual events) with the scope triggering on the first event.  If
you try to "zoom in" by just turning the time base "up," you start
triggering on all the individual events.  The event you were trying to see
probably flashed by in the mess at some point but you're lucky if you could
recognize it from all the other stuff flying by.  But, if you delay the
sweep (after the main trigger at the beginning of the burst) until # 37
comes up, you can speed up the sweep and essentially zoom in on a small
part of the complex signal.  This is real handy when analyzing video
waveforms but you'll probably find a synth related use.

How:  Since I wind up goofing around for 10 minutes every time I try to use
a delayed trigger/sweep feature and since most scopes seem to differ
greatly in this matter, I'm probably not the person to try and explain
"how."  I'd say generate a waveform that fits the above description (with
your modular) and play with it.

Have fun!

Buck
-------------
Interviewer:  "How Many robots does it take to screw in a light bulb?"
Proto Unit V3: "Two"
00ZX1: "Two.  One to screw in the light bulb and one to cut the head off
the nearest human."

-Servotron in interview-