SV1730: When installing the SV1730 I just get audio but no video, or vice versa.

To be sure the SV1730 will work properly with your set top box or decoder, you will need to contact your signal provider and ask if their signal is protected by copyrights, some signal providers are protected to stop illegal recording/transmissions of their signal, resulting in this issue when using the SV1730. The best way is to check directly with the signal provider.