Winfield said:
But just verifying the presence of probe-power doesn't
test the circuitry of the 1103's four input controls.
Sometimes they took empty FET probe pods from stock and built generators
and stuff into it which in turn inject the desired wave form into a
scope inputs. Just like us guys occacionally take a ballpoint pen, scrap
its guts out and put an "RF noise maker" into it. You'd be surprised,
today's college kids sit there with their mouths wide open when I am
using something as simple as a pocket size signal injector and find out
within a few seconds which one of their amp stages ain't working. "What
on earth is that thing?" Ok, on that one I cheated, bought it for around
$5 from a hobby electronics place in the 70's. The days when people
still repaired their radios instead of throwing them away.
Of course, for field demo purposes I'd have used someting with an AA
battery in there. Much easier to travel with. Well, maybe not nowadays
with the new TSA rules.
