What are clear QAM channels?

An unencrypted digital channel from the cable company. Most digital TV sets have a built-in clear QAM tuner, which can decode a limited number of TV stations, such as local broadcasts, PBS and shopping channels. Premium channels are always encrypted, and non-premium channels may be as well. See QAM.

What is ATSC 8VSB?

8VSB is the modulation method used for broadcast in the ATSC digital television standard. A modulation method specifies how the radio signal fluctuates to convey information. ATSC and DVB-T specify the modulation used for over-the-air digital television; by comparison, QAM is the modulation method used for cable.

What does 8VSB stand for?


Acronym Definition
8VSB 8-Level Vestigial Sideband (US ATSC broadcast standard)

What modulation does digital TV use?

quadrature amplitude modulation
To transmit the digital signal, it uses quadrature amplitude modulation (QAM) or vestigial side band (VSB) modulation techniques (after compression), whereas analog television transmits in amplitude modulation (AM) which is uncompressed.

Do you have to have a cable box to use QAM?

ATSC is used to receive digital channels over the air. QAM is used to receive digital channels from a cabe TV provider without use of a cable box. Your TV must support QAM to function on the Comcast provided ResNet HD Cable TV system.

How to check if your TV has a QAM digital TV tuner?

The best way to check if your digital TV’s tuner is clear QAM capable, is to connect your TV and use your remote control to manually tune to a few digital channels. BFor example, enter “9” “-” “1” (nine, dash, one) and press “enter” if necessary.

Do you have to pay for ATSC digital TV?

ATSC is free-to-air digital TV for North America and typically requires an antenna for reception. There is no monthly fee for ATSC HD TV If you live in an area where you can’t receive ATSC digital TV, U2368 can still be used to watch and record analog TV from cable TV or a TV antenna.

What does NTSC stand for in TV tuner?

To distinguish the older analog tuner from the newer digital standard, the analog tuner became known as an NTSC tuner. NTSC stands for National Television System Committee.