How does a DVR Recorder Work?

DVRs record TV programs using tuners within the device. Whether cable, antenna or satellite, a dual tuner allows users to either record two programs at once as they are aired, or to record one and watch another. More tuners allow you to record and watch more shows simultaneously. As the broadcast goes through a tuner, it is recorded to the digital hard drive. Hard drive sizes vary by device, but many can hold up to 90 hours of programming at a time or more.

One of the biggest selling points to consumers is the ability to skip over commercial breaks. As the show is recorded and stored on your DVR, you can fast forward, rewind and pause your show as you watch it. Many DVRs also allow you to pause and rewind live programming and to fast forward up to where the live broadcast currently is if you previously paused it.

This type of DVR was met with some controversy. Cablevision rolled out its network DVR that allowed customers to record programs not on a device in their home but on a computer server at Cablevision. According to a 2008 article in "The New York Times," the U.S. Court of Appeals for the Second Circuit in New York ruled that this did not violate copyright law. The U.S. Supreme Court refused to hear a final appeal on the matter. Network DVRs record individual copies of a show for each user to mimic home DVR devices.

Whether you purchase a separate DVR device or use your cable or satellite provider's DVR technology, there will be an additional cost. Separate DVR devices can allow for more recording time, offer additional services and programs, and charge a monthly fee. DVRs through your programming provider may be cheaper if bundled with your other services and may include network DVR technology.