juanmiglesias wrote:
I measure the V on the power before turn it on at 13v, but once is switch it on goes to 8.65
That's
mostly expected. Older external power supplies are often "unregulated", and the no-load voltage is often quite higher than the loaded voltage.
For the SNES, specifically, I'd still expect it to drop to 10V when the SNES is on instead of 8.65V, though. I guess I should actually test on my SNES...
Ok, so:
No-load voltage on my SNES, measuring ground plane to +ve side of the power switch: 13.69V
Load voltage on my SNES, same measurement points: 10.67V
Voltage out of regulator, when on: 5V
.... and now my SNES has stopped booting. Lovely. I was going to measure current next, but any result will be suspect.
Quote:
but well my question about the Oscilloscope, I have a tenma 72-720, analog, and I got to trigger the signal of a RGB line, used the tv filter, and got a dotted curved shaped like this /l/l/l and range seems to be inside the 1V.. hard to tell as this is analog.
A picture would be much more useful.
In general, component video should look something like
this for composite, s-video/component luma, or sync-on-green. For Y-B, Y-R, R, B component, it should look similar, just without the square notches that go down.