Looks like a normal interlaced still frame to me. You can't see the interlacing on TV because TV is field based (=interlaced) thing too. Computer monitor on the contrary is frame based (aka progressive). It does not separate even and odd fields. That is why you see the comb like effect visible especially on sharp moving edges if you watch interlaced material on a computer monitor.
If you switch the XL1s to frame mode it will record full frames at 30fps instead of interleaved fields at 60fps. This kind of footage will look jerky on a regular TV but on a computer screen the frames look better.
It is possible to deinterlace interlaced footage afterwards but afaik the result can't never be perfect. Here's your frame deinterlaced in after effects. I also changed the pixel aspect ratio to square (in NTSC DV it is 0,9 and in PAL it's 1,0666...).
Do some searches with google and you'll find lots of information on this. It's like opening a can of worms