2 Nov
2006
2 Nov
'06
1:35 p.m.
On Thursday 02 November 2006 16:04, Chris M wrote:
I seem to remember something about RS-170 style
video
being 1 volt peak to peak or .7 volts peak. "P2P"
seems to indicate a signal that is half negative
going? Would have to do more research, but if not,
maybe a resistor would do the job (i.e "convert" 5
volts to a correspodingly "high" analog voltage, as
mentioned).
Peak-to-peak means the difference between the maximum and minimum
voltage of the signal. Something that ranges from + 5V to +10V
above "ground" would be "5V" P2P, but a 10V peak signal.
In the case of RS-170 video, it's -0.4V - 1.0V, so 1.4V p-p or 1.0V
peak.
The older broadcast monitors were designated RS-170
(those with seperate color inputs) I do believe. Maybe
modern VGA signals and whatnot are also compatible.
One problem...what do you do with the Intensity input
(older TTL monitors are not RGB, they're RGBI).
RS-170 is US baseband video without color. RS-170A is US baseband video
with color (NTSC). (525-line, 3.579545 MHz colorburst frequency, 59.94
fields per second, 29.97 frames per second).
Pat
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