user24841: More a terminology question than anything. 
As described in the headline, I want to locate a piece of hardware that can accept arbitrary IP streams (be they MPEG-TS, H264, etc - the exact input format isn't important since re-encoding is easy), and can somehow output those streams over a coaxial cable (RF) in a way that a normal, off-the-shelf TV can tune to those streams in the same way they'd tune to a regular TV channel.
This is not a hardware recommendation question. I just want to know what this class of device is properly called so I can locate it myself.

user14523: There is no special name for something that combines IP de-encapsulation and RF modulating. At least one company markets the device as a QAM modulator with IP input.

24841: <p>More a terminology question than anything. </p>

<p>As described in the headline, I want to locate a piece of hardware that can accept arbitrary IP streams (be they MPEG-TS, H264, etc - the exact input format isn't important since re-encoding is easy), and can somehow output those streams over a coaxial cable (RF) in a way that a normal, off-the-shelf TV can tune to those streams in the same way they'd tune to a regular TV channel.</p>

<p><strong>This is not a hardware recommendation question</strong>. I just want to know what this class of device is properly called so I can locate it myself.</p>
 14523: <p>There is no special name for something that combines IP de-encapsulation and RF modulating. At least one company markets the device as a <a href="https://www.dektec.com/products/IP/DTE-3114/" rel="nofollow noreferrer">QAM modulator with IP input</a>.</p>
