21 Jan
2016
21 Jan
'16
11:51 a.m.
Just for my understanding: if I do the math: 512
pixels x 400 rows = 204'800 pixels
at 50 Hz I end up with 10.2 MHz and at 60 Hz = 12.3 MHz.
There is more "room" required for the retrace time, probably another 10% or so?
To avoid the inaccuracies from the unknown vertical retrace time (and unused lines, etc)
I would say that 512 pixels per line and 25kHz line time -> a pixel rate of at least
12.8MHz.
It will be higher than that due to the horizontal retrace time, of course
So I understand that the monitor must be capable of
~25 kHz and 10...14 MHz and that
I better try before buy.
Yes.
It is difficult to find specs for these HP 9000 video
boards.
I have no idea as to the resolution, but there is an HP98204A that outputs TV rate
(US or European I think) video.
-tony