Patch Fix Keyboard Rf Modulator

It isn't as simple as you might think. You need an HDMI receiver/decoder chip and a VGA/composite encoder/transmitter chip, both of which are readily available from vendors such as Analog Devices. Then, you either need to convince the HDMI source to produce an SDTV-compatible signal (interlaced) through the EDID data that you send it, or you need to do an explicit scan-rate conversion between the two chips mentioned above, which requires a couple more chips. Finally, you need an RF modulator to convert the baseband composite output of the encoder chip to an RF signal that the TV can receive.

Or you could just buy a box that performs this function, but that would be off-topic here.

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