If your Sky box distribution system is suffering from a poor picture or patterning interference then your Sky box RF modulator will need retuning. This retuning guide helps you re-tune your Sky TV Digibox, Freeview Box, PVR or VCR to accommodate recent changes to Freeview channel allocations as a result of UK Digital Switchover. Retuning a Sky Digibox, Freeview Box or Video Recorder
