DirecTV DVR40 用户手册

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: A coaxial RF cable transfers both audio and video on a single cable.

: An optical (or digital) audio cable transfers audio only. 

This cable transfers audio at the highest possible quality from your DIRECTV DVR to an 
A/V receiver. If you have a home theater, own an A/V receiver capable of receiving 
Dolby



 Digital audio, and wish to use Dolby



 Digital audio, then you must use this cable. 

Not all A/V receivers with optical audio inputs are capable of receiving Dolby



 Digital 

audio. An optical audio cable is not included with the DVR.

: A BNC Cable is similar to a coaxial RF cable and transfers both audio and 

video. This type of cable is not included with your DVR. However, you may already be 
using a BNC cable in an existing connection to your TV. If so, you can purchase an 
adapter that will allow you to connect BNC cables to the RF In or RF Out jacks on your 
DVR.

: The included telephone line splitter allows you to plug both a 

telephone and your DVR into a single telephone wall jack.

: A switch box is a small box that allows you to connect multiple devices to 

your TV, even if your TV does not have enough input jacks to connect them all directly. It 
allows you to switch easily between viewing DIRECTV channels, viewing video from 
your DVD player, or running your game system. Switch boxes are inexpensive and can be 
purchased at electronics stores.

: An A/V receiver is similar to a switch box but is more sophisticated. It may 

offer additional features such as remote control or Dolby Digital audio capabilities. An 
A/V receiver allows you to connect multiple devices to your TV, even if your TV does not 
have enough input jacks to connect them all directly. It allows you to switch easily