Re: ITU-R BT.1886 Gamma formula?

Re: ITU-R BT.1886 Gamma formula?

Home Forums General Chit Chat and Other Stuff ITU-R BT.1886 Gamma formula? Re: ITU-R BT.1886 Gamma formula?


Thanks Gregg…

What I was getting to, in a round about way -My question seems to evolve with discussion, is that if one goes from 1886 to power, then it seems that also requires a change in the gamma points to get it to NOT read 0 in a saturation sweep (also a restart). At least that is how the software is behaving. Also, if I understood a response I received elsewhere, 0 is not required if using power; however, I am wondering what it is doing when it is set to power and the scale is set to 11pt. Is it using the 0 measurement or not. It seems like from the response I received, but I need to follow-up -If a 0 is specified, then it won’t read 0 or use it (not sure on this exactly).

But, the question I haven’t answered in my mind is what is happening if I leave 0 measured and use only a 10pt. This can happen because of the new default. So, I was trying to understand the components needed to create the sweep, and see if I can determine what is happening, based on the settings I change. IN the simulation mode, I think it is nearly impossible, since it may not be pulling any data and just generating random example data. so, the gist is, if I want to change the workflow from 1886 to power, what changes to the various settings need to be changed in CalMAN? Power, gamma pts, and 0 read, or will it correct itself if I just change to power, and don’t change anything else…??

Maybe this is best addressed on SpectraCal Forum, but sometimes I get some answers that leave me with just as many questions, so I thought I would try here to see if I can get a little insight.

So, thanks to all for help… It is invaluable to have so many knowledgeable resources.