Feedback from Samsung as below
This information can be found from User Manual. {Section 7.7 PIP }
Main picture Sub picture
PC AV
AV PC, HDMI, DVI, DisplayPort
Component N/A
HDMI, DVI, DisplayPort AV
MagicInfo Lite PC, AV, Component, HDMI, DVI, DisplayPort
“MagicInfo” will fall into “HDMI, DVI, DP” source as it is connected to HDMI to the screen.
You can see from the table that to embed DVI or HDMI, the main source must be AV or MagicInfo Lite.
(TV’ source is only available on US models).
So I'm in the process of getting an AV source to test this. Shame though, as I wanted a HD digital source to make the most of the HD display not an analog source.
I am also not sure if the size I set in the authoring software will be honoured by the screen or if I can only use the fixed sizes and positions of the PIP defaults. I guess I'll need to test this. Hey ho.
Just for completeness and the benefit of others I will post again once I have tested. If anyone out there has already done all this before and knows the answer to the screen using the size specified in the authoring software , please can you post.
Thanks
Nev