I was recording a terrestrial channel last night and found that I was unable to watch NTL digital as the CVBS input had "hijacked" the AV1 slot and I could not switch it back to the RGB input to view NTL digital. Is this correct? I have the VCR connected to the STB via scart. The STB is connected to the AV1 slot on the TV via scart. The external arial goes to the video which is then connected to the TV ariel in via RF lead.