Moderators: Dave Moll, Andrew Davie, Steve Anderson
Panrock wrote:And a "well done both" from me too.
This sort of cross-border teamwork would have been impossible (or at least very difficult and slow) without the internet. New technology in the service of the old! (Well maybe not quite so 'old' bearing in mind Steve A's advanced techniques).
You have built a really useful bit of kit there Harry. My 'Argus' is about 20 times as heavy and unwieldy and in any case doesn't go down to NBTV standards.
Steve O
Harry Dalek wrote:...the NBTV side of your video converter will be great to see !
Klaas Robers wrote:Harry, I have the feeling that your pictures are too high or too narrow. You will be able to adjust somewhere the picture heigth and the picture width. NBTV pictures should have an aspect ratio of 2 : 3, or 1 to 1½. That is INCLUDING the sync pulse, so in practice it will be closer to 3 : 4. If you have the Grant Dixon test picture, the circle should be a true circle. However there are more frames with a circle.
On the page http://www.nbtv.org/sound.htm you will find almost at the bottom a button to download the file http://www.nbtv.org/nbtvideo.zip. Unzipped this will give you a wav file which includes the Grant Dixon picture.
The frame sync is also a problem. Because of the missing sync pulse, the sync separator gives the pulse half way line one, the line of which there is no preceding line pulse. In most cases this causes that you will not see line 1. For a mechanical Nipkow disc this is not a problem, as line 1 always follows automatically line 32. This is much more difficult for an electronic monitor.
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