New monitors on old machines

[Chris M]

--- Patrick Finnegan <pat at computer-refuge.org> wrote:
 
> 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.

 Well that's encouraging. I was thinking in terms of
sine waves and such, which have a peak to peak
voltage, and in that case, half of the cycle is below
ground. I was under the impression that measuring such
a signals "peak" voltage was an rms value, but I guess
I botched that up too :)
 
> >  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).

 So RS-170 has nothing to do with the amplitude of the
signals? Or should I ask to specify something as
RS-170 compatible/compliant.


 
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