Liteon 5006

i have noticed that there seems to be quite a bit of jerky movement when i record a minus or plus disc permanentā€¦can the problem be because of sky.
i was recording some music videos off there last night and i noticed that the
picture began to go a little haywire but if i pressed pause and changed
channels it stopped for about half an hour and started again.does anyone know
how to solve this. :frowning: