Did a search and couldn't come up with an answer so I thought I'd throw it over to the experts! What is the number of OTA tuners installed in DirecTV's Plus HD DVR that you can use to record with? Thanks for the help!
There are two OTA (and two satellite) tuners in the HR20. The HR21 does not have OTA tuners, but the AM21 (to be out soon) will add two OTA tuners externally with a USB connection to the HR21.
But do understand that you can ONLY record with up to 2 tuners at the same time, as each OTA tuner is basically combined with each sat tuner.
So, you could do 1 sat & 1 OTA at once, or both sat OR OTA's at once, but NOT 3 or 4 at once.