28 May
2010
28 May
'10
1:05 p.m.
Tony Duell wrote:
The Vertical and Horizontal Timebase is detached internally when
switching to X-Y mode. There is no triggering involved. Basically, the
inputs are fed directly into the deflection control for each X axis and
Y axis - much like on a Vector monitor inside the Asteroids cabinet. So
Err, yes, I realise that. I have worked on vector display systems
(although not arcade games [1]) and I do own several 'scopes...
[1] But the only hoime video game console I own uses a vector display...
For just
playing around you can also use an oscilloscope in X-Y
mode... even better if you can trigger off of another input too.
Since a 'scope in X-Y mode doesn't use the timebase, I am wondering just
what is 'triggered' ?
then the voltage input is converted to deflect the
beam up/down or
left/right. For those scopes with a Z axis input, this provides an
additional intensity level control to change the brightness of the beam.
Looks at the 'CRT Cathode' terminals on the back of my 555....
My comment was the word 'trigger'. I don't see how that could apply to a
vector display.
-tony