Amazon.com: HDMI Modulator RF Converter RCA Coaxial Composite VHF UHF SDR Demodulator Adapter w/Antenna in/Out & Channel Switch for Roku Fire Stick Cable Box HD Digital AV Component Video to Analog NTSC
VeCOAX-BT Encoder Modulator 4-HDMI-M4-RF-IP Four Channel Professional HDMI H.264 Broadcast HD Video Encoder Modulator with ASI RF out |PVI
2Ch HDMI to QAM/ATSC/DVB-C/DVB-T/ISDB-T+ IPTV MPEG-2/H.264 Encoder Modulator with AC/3 & CC EIA 608 support