Is there a TV modulator of this format?

Question

A television

There is a car with the ability to play on the head: TV, DTV 1, DTV 2 (I wrote this as it is called in the car, in the instructions there are some details other than DTV - there is no digital). TV is played, but DTV1 and DTV2, despite the fact that I chose Russia in the list, does not find channels. Analog certainly works, everything is okay. I wanted to use DTV1 / 2 for my needs
The task is to buy a device that will digest everything from an HDMI device into a DTV 1/2 channel. The catch is that I do not really understand what this device is called. What I found is called a modulator, it confuses the presence of an output there. And the task is just so that the device translates the signal by radio, and not by cable, so that it goes into DTV, some channel is highlighted there, poked and the picture goes.
Very similar things are FM transmitters, when it allows you to read flash drives directly to some FM station. Here it is necessary not to music, but to shoot the video also without wires

Answer 1

Well, buy a dvb-t modulator and try in the RF connector, stick a piece of single-core wire 0.5m - it will be a transmitting antenna.