What is 760P?

760P is not a standard used by HDTV. The closest standard is 720P.

The 760 may refer to the horizontal scan lines of the TV/signal. The P stands for Progressive Scan which is how the frames or the picture are put together. Progressive Scan draws all the lines of each frame sequentially as opposed to another method, Interlaced, which draws only the odd or even lines of a frame and then vice versa for the next frame.