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Re: Apple ][ Europlus video....

In article <bflish$1g8h4$1@hades.rz.uni-saarland.de>,
Linards Ticmanis  <ticmanis@coli.uni-sb.de> wrote:
> Peter Ibbotson wrote:
> 
>> Finally gotten one of eBay. Came with a video modulator but no PAL encoder.
>> My question is did anyone ever get any joy feeding this signal into a modern
>> TV which claims NTSC 3.38/4.43 (I assume this really means 50/60) support?
> 
> Not really likely. 3.58/4.43 probably really means 3.58/4.43 and it
> means the color subcarrier frequencies. "NTSC" means simply means, in
> this case, that there is not phase-alternation between lines and that
> there is no averaging of the color signal with that of the preceding
> line, as in PAL. 50/60 ability is another beast.
 
3.58/4.43 ability is most likely related to 60/50 ability, since there
would be no point in keeping these separate from one another.  The
color subcarrier frequencies are (MHz):
 
             50/625        60/525
PAL        4.43361875    3.57561149
NTSC       4.4296875     3.579545
 
The two major systems are of course PAL-50 (4.43361875 MHz) and
NTSC-50 (3.579545 MHz).  A few countries (Brazil, Laos, Thailand)
use PAL-50 (3.57561149 MHz).  And NTSC-50 (4.4296875 MHz) is nowadays
not used but was used for expermiental transmissions in Europe in
the early 1960's, before Europe decided on using PAL and SECAM.
instead.
 
> The problem: The Europlus does not produce either a 3.58 or a 4.43 MHz
> subcarrier - it is another value still, I think about 1% or so below
> 3.58 Mhz IIRC, but that difference should be quite enough for your TV to
> be unable to pick it up.
> 
> The only way to get color from a Europlus is really a PAL encoder board,
> or changing the board back to II+ mode and using an NTSC Monitor.
 
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