QAM or QUADRATURE AMPLITUDE MODULATION is a modulation scheme in which two sinusoidal carriers are used tp transmit data over a given physical channel.this is an effecient way of transferring binary data over cable.it is used for multiple dwelling unit of installation.

Answered by aliasgar , an ibibo Master, at 9:44 PM on May 07, 2008

QAM stands for-Quadrature Amplitude Modulation. it is a method of modulating digital sigmals using both amplitude and phase coding.The signal modulation system used for digital cable TV

Answered by a banerji , an ibibo Master, at 12:22 AM on May 07, 2008

Quadrature amplitude modulation is the combination of amplitude modulation and phase shift keying. More technically, quadrature amplitude modulation is a system of modulation in which data is transferred by modulating the amplitude of two separate carrier waves, mostly sinusoidal, which are out of phase by 90 degrees (sine and cosine). Due to their phase difference, they are called quadrature carriers.

Answered by Kajal Sharma , an ibibo Master, at 8:56 PM on May 04, 2008

well, QAM tuner is a device present in some digital televisions and similar devices which enables direct reception of digital cable channels without the use of a set-top box.[1]

QAM-based HD programming of local stations is sometimes available to analog cable subscribers, without paying the additional fees for a digital cable box. The availability of QAM HD programming is rarely described or publicized in cable company product literature.

QAM stands for "quadrature amplitude modulation," the format by which digital cable channels are encoded and transmitted via cable. QAM tuners can be likened to the cable equivalent of an ATSC tuner which is required to receive over-the-air (OTA) digital channels broadcast by local television stations; many new cable-ready digital televisions support both of these standards.

Answered by satyaiitk , an ibibo Master, at 5:16 PM on May 02, 2008

hi disha:-
QAM-based HD programming of local stations is sometimes available to analog cable subscribers, without paying the additional fees for a digital cable box. The availability of QAM HD programming is rarely described or publicized in cable company product literature.

QAM stands for "quadrature amplitude modulation," the format by which digital cable channels are encoded and transmitted via cable. QAM tuners can be likened to the cable equivalent of an ATSC tuner which is required to receive over-the-air (OTA) digital channels broadcast by local television stations; many new cable-ready digital televisions support both of these standards.

An integrated QAM tuner allows the free reception of unscrambled digital programming sent "in the clear" by cable providers, usually local broadcast stations or music. Which channels are scrambled varies greatly from location to location and can change over time; the majority of digital channels are scrambled because the providers consider them to be extra-cost options and not part of the "basic cable" package.[2]

In the United States a television that is labelled digital cable ready can have a CableCARD installed by the cable provider to unscramble the protected channels, allowing subscribers to tune all authorized digital channels without the use of a set-top box.[3]

Answered by shepherd , an ibibo Master, at 6:24 PM on May 01, 2008

qam:- Quadrature amplitude modulation

Answered by surender , an ibibo Advisor, at 3:46 PM on April 24, 2008

Quadrature (Amplitude) Modulation .

Answered by ajay bhutani , an ibibo Citizen, at 1:08 PM on April 24, 2008

Quadrature amplitude modulation (QAM) is a modulation scheme which conveys data by changing (modulating) the amplitude of two carrier waves.

Answered by Hem@nt , an ibibo Master, at 12:26 PM on April 24, 2008

QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications.

Answered by swadesh , an ibibo Specialist, at 11:44 PM on April 23, 2008

QAM (quadrature amplitude modulation) is a method of combining two amplitude-modulated (AM) signals into a single channel, thereby doubling the effective bandwidth. QAM is used with pulse amplitude modulation (PAM) in digital systems, especially in wireless applications.

Answered by Manju Jain , an ibibo Citizen, at 4:47 PM on April 23, 2008