20-08-2019, 12:12 PM
Hi Jeffery
Playing around with the settings has paid off
.
I haven't been able to get clean syncs on bypass plus H sync on a separate pin.
What I can get is syncs that start off OK but then the rest of the sync is obliterated with a burst of some description but still should be able to use to extract odd/even. On the plus side the embedded syncs are still there so wont need a separate H sync pin.
I will have to extract odd/even field. I will have to have a think about that as I haven't done it before but having good embedded H sync should make it easier.
The first two photos below are the output straight from the decoder showing H sync and V sync.
The last photo is the bypassed video going through the converter seen on 625 lines. The video is sitting on a pedestal the height of the 405 syncs. This can be easily be removed and adjusted to give full video range.
Sorry about poor photos I am not using my usual scope.
Frank
Playing around with the settings has paid off
.I haven't been able to get clean syncs on bypass plus H sync on a separate pin.
What I can get is syncs that start off OK but then the rest of the sync is obliterated with a burst of some description but still should be able to use to extract odd/even. On the plus side the embedded syncs are still there so wont need a separate H sync pin.
I will have to extract odd/even field. I will have to have a think about that as I haven't done it before but having good embedded H sync should make it easier.
The first two photos below are the output straight from the decoder showing H sync and V sync.
The last photo is the bypassed video going through the converter seen on 625 lines. The video is sitting on a pedestal the height of the 405 syncs. This can be easily be removed and adjusted to give full video range.
Sorry about poor photos I am not using my usual scope.
Frank
