(Slightly off topic, but interesting - at least to me, anyway.)

The pattern above, from the Jason LD, is actually the BBC's Test Card G. A slightly modified version of a pattern from the Philips PM5544, it was first broadcast in 1971, and was the first electronically generated pattern to be used by the BBC.

The frequency sweep (the waveform pattern below centre) ranges, I think, from 1.5 MHz to 5.2 MHz. The upper limit of LD bandwidth is listed in various places as around 5.5 MHz (or an equivalent resolution of 440 TVL) so any player that shows some definition in the 5.2 MHz region is doing very well. The D925 shows a little definition here when using the s-video output, but it's still almost flat.

(I've also since found the PM5544 pattern used on a clock and a pillow!)