Date   : Sun, 12 Jul 2009 21:38:35 +0100
From   : afra@... (Phill Harvey-Smith)
Subject: Atom Questions

Ian Wolstenholme wrote:
> Thanks for this.  On the Composite Video point, one of my Atoms has a
> lead which plugs into the video connector and has a comp video plug
> at the other end.  I tried it with my DVD recorder to do some recording,
> but the picture isn't stable, it just scrolls vertically round the screen.

It may be worth bearing in mind that the 6847 chip used in the Atom, 
outputs NTSC, so your DVD recorder may have problems syncing to that.

The same chip is used in the Dragon 32/64, but those machines contained 
extra circuitry to generate extra blank lines at the top and bottom of 
the picture to fill it out to PAL 50Hz.

> My DVD recorder won't pick up the UHF signal either.  It only has an
> automatic channel scan function, stupid thing, and goes straight past
> the Atom frequency even though it displays a picture at about 590MHz.
> I've just discovered that it does the same thing when connected to 
> a Master, so it's not the Atom at fault, so there isn't going to be any
> recording done tonight!

Humm possibly not then, I have heard of problems getting old computers 
talking to modern TVs, Sinclair ZX80/81s spring to mind.


Cheers.

Phill.

-- 
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !

"You can twist perceptions, but reality won't budge" -- Rush.