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what is a qam tuner?

Posted by graylight (My Page) on
Sun, Apr 29, 07 at 12:09

Hi everyone,

I was looking over some tvs at techbargains. Comparing the LN-S4051D to the LN-S4042H.

Aside from the higher contrast ratio of the latter (and the higher price), what is a QAM tuner? Do I really need it? They both have digital and analog tuners but the second set has a QAM tuner. What is that?????????

Thanks!


Follow-Up Postings:

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RE: what is a qam tuner?

If you don't have a cable tv set top box,
yet you do have cable tv signal
... the QAM tuner tunes the digital cable signals.

Quadrature amplitude modulation (QAM) is a modulation scheme which conveys data by changing (modulating) the amplitude of two carrier waves. These two waves, usually sinusoids, are out of phase with each other by 90 and are thus called quadrature carriershence the name of the scheme.


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