Direct Tv Hd Antenna Wiring Diagram - View and Download Sony KP-51HW40 service manual online. COLOR REAR VIDEO PROJECTOR. KP-51HW40 Projection TV pdf manual download. Also for: Kp-57hw40.. Above is a 13 element (see element count) TV aerial [above left] and 3 element DAB aerial [above right], illustrating the main components found on Yagi type aerials. Note the use of a cradle on the TV aerial which it is good practice to use for all “high gain” aerials (particularly X Beams) due to their higher wind loading. Mounting cradles strengthen the aerial and reduce the twisting. Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. It conveys two analog message signals, or two digital bit streams, by changing (modulating) the amplitudes of two carrier waves, using the amplitude-shift keying (ASK) digital modulation.