What’s the difference between a handheld TV labled as an “MDTV” and a handheld with an ATSC tuner?
Feb 9Summary
There is a distinct difference between the two types of tuners that handheld and mobile television sets are built with. This is in reference to mobile devices that receive free, over-the-air television signals.

MDTV
Mobile or handheld television sets labled with an “MDTV” logo (as pictured to the right) are capable of receiving digital broadcast signals while travelling at speeds of 100+ Miles Per Hour. (See: What is MDTV for more info)
Handheld TVs w/ an ATSC Tuner
Handheld TV sets with a built-in (digital) ATSC tuner are capable of receiving digital television signals, but are unable to receive digital signals while travelling at a speed greater than 5 Miles Per Hour.