Featuring five significant advances in IR control to achieve their remarkable sensitivity, performance and reliability in a wide variety of installation environments. The Xantech <b>HL85BK</b> LCD/CFL friendly Hidden Link IR Kit includes an HL85 table top infrared receiver, 1x4 connecting block and 4 IR emitters.</p><p><b>Native Carrier Frequency Transmission Circuitry</b><br />Nearly every IR system relies on a carrier frequency to "carry" the commands to their destination. Some consumer electronic devices, especially digital cable and satellite TV boxes, are very picky regarding carrier frequency accuracy. At times, they may not accept remote commands unless precisely the right carrier frequency is present.</p><p>Unfortunately, many IR repeater systems take a technical short-cut and simply strip away the carrier frequency upon reception instead of intelligently identifying and removing the unwanted noise and interference from it -- and then attempt to regenerate or replicate the carrier frequency. This can result in incomplete or incorrect IR signals and a lot of frustration and expense for a system designer.</p><p>Xantech takes no shortcuts here. Rather than trying to make a copy of the carrier frequency to compensate for inadequate parts and circuit design, Xantech uses better-quality components and circuitry that can accurately process the original carrier frequency. By doing so, a Xantech IR kit eliminates the noise and interference instead of the carrier itself, and transmits the original IR signal in its correct form to the rest of the system. The result is a dead-on accurate signal transmission -- minus all the noise and distortion.</p>