At 2018-11-05 12:07 PM, Rick Boswell wrote:
So ¡ what does this all mean? A
SWAG on my part, but it looks to me like something is out of adjustment
with the Z axis signal from the character generator. (Not yet sure just
how this works.) It wouldn¡¯t seem to be a CRT problem as it is limited to
just the text characters. Any insights from the pros
here?
I'm not familiar with this particular unit, but have a basic familiarity
with the hardware needed to generate vector characters. I'd be looking
for a bad cap where the slew rate of the X and Y axes are controlled,
probably two identical caps with similar failures. If the slew rate isn't
controlled, the beam jumps from endpoint to endpoint,
"painting" very little light in the middle. Hmmm....I can see
counterarguments against my analysis too. Are there differences in
brightness of horizontal vs. vertical strokes? I'd be quite curious what
you find.
Steve Hendrix
