Doing vector scan with tektronix 465b.
Patching H ramp in x, V ramp in y, camera luma in z.
Problem : there s “hole” in V ramp
on the crt it looks normal
i m lost… thks for help
denis
That’s either a problem with the z signal, or theres a nonlinearity in the ramp. Put your score in to normal mode and view just the ramp in the scope. If it’s just a normal ramp it’s something up with z. Does the blank area scroll or is it stable
You can’t have a hole in an oscilloscope trace, but it can move very quickly from one value to another, like a square wave, although hard to see its still a solid line. So if there appears to be a hole is withe because the signal jumps very quickly from one value to another or because the z is going down to a low value at that part
hello,
it s not comming from the z input. on the second pictures i ve plugged only the y input.
Yes it s scrolling, slowly but it s scrolling
Ok, can you take a picture of just the y signal in a normal scope mode, not xy mode? That will help show how the signal is distorting
ok. i will this week end. thx
