The only reason you would buy this card is for demodulation. If you're not sure what it is, then you probably don't need it and you'd be better off choosing one of the cheaper cards.
Legrand OnQ VM1002 1x8 Enhanced Passive Video Splitter for Optimal 1GHz Performance
12 Review
MoCA Filter 5-Pack for Optimal Cable TV & OTA Coaxial Network Performance
11 Review
TV tuner LUMAX DV-4205HD black
46 Review
High Performance Extreme Broadband Manufacturing BDA103HB 3-Way Balanced HD Digital Coax Cable Splitter, 1GHz
11 Review
Dorhea LM2596 DC-DC Buck Converter Step-Down Regulator 4.0-40V To 1.25-37V DC 36V To 24V To 12V To 5V Volt Power Supply Module With LED Voltmeter Display Compatible With Car Motor Buck
16 Review
HOMELYLIFE 600W High Power Voltage Reducer DC 48V 60V 72V Step Down To DC 12V 50A Buck Converter Waterproof Module Car Truck Power Regulator Transformer
12 Review
VINTAR EU To US Plug Adapter 3-Pack For Easy Travel: Europe To USA Converter For Spain, France, And More, Compatible With Type C/E/F Plugs - European To US Power Adapter Solution
11 Review
DC/DC 12V To 24V Boost Converter 40A 960W - Waterproof Voltage Regulator Module For Car Power Supply (10V-16V Input)
15 Review