In PSP, you can add the interference with the Adjust...Add/remove noise...Add Noise feature. Use Gausian, Monochrome, 25% as a starting point, but adjust those settings until you get the effect you are looking for.

For the Horizontal Scan Lines, use: Effects...Texture Effects...Blinds. Check Horizontal, Light from left/top. and make the color black.  Width 2, Opacity 25%. As with the noise, you can fiddle with those settings until you find what you want.

There are probably other things you could fiddle with to degrade the image, so if the basic method above is still missing something, you'll have to experiment with other adjustments and effects. :)