My daughter has an older TV set that only has an RF connector. She already has a VCR connected to it. She wants a DVD player. Is it possible to connect the DVD player to the VCR so she can use both? I understand about the picture quality of the DVD being degraded with this set-up but I'm trying to connect both units to the TV. If not, can I purchase an RF modulator to connect the DVD to one half of a 75 Ohm splitter or switch with the VCR connected to the other side thereby having 1 RF connection to the TV? Thanking you all in advance.