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
i ve change cable, invert the x and y. always the same pb.
i ve checked the v ramp on the oscilloscope. there s hole
on the crt it looks normal
i m lost… thks for help