Quite some time ago, DIRECTV stopped including serial ports on the back of its standard definition receivers. The last receiver to include one, the D10, hasn’t been manufactured in years. No subsequent receiver (D11, D12, D13, etc.) has included the port.
Why does this matter? The serial port allows a hard-wired connection between a TiVo and a receiver. It minimizes communication problems that can sometimes occur when using IR blaster cables. Serial control also reduces the time it takes for the TiVo to change channels.
Unfortunately, DIRECTV still does not include serial ports on the back of it’s receivers. However, we have obtained a small quantity of older-model RCA receivers that have low-speed data ports that work perfectly with standard definition, standalone TiVo units. You can find those TiVo-Compatible DIRECTV receivers here. The receivers come bundled with the specialized home-control cable that you will need to connect the TiVo to the receiver.
As we indicate on the website, these units are refurbished, and they currently get all of the standard definition stations coming down from DIRECTV. However, they do not include a remote that can control the “Mix” stations that DIRECTV has launched. For TiVo owners, however, this shouldn’t matter, as TiVo units cannot control these stations even on receivers that are compatible with them.