18 18CONNECTIONSAudio ConnectionsThere are two formats for audio connections: digital and analog. Digitalaudio signals are of higher quality, and are required for listening tosources encoded with digital surround modes, such as Dolby Digital andDTS. There are three types of digital audio connections: HDMI, coaxialand optical. Any one type of digital audio connection may be used foreach source device, but never more than one for the same source.However, it’s okay to make both analog and digital audio connectionsat the same time to the same source.NOTE: Since the AVR 247 is capable of processing the audioand video portions of most HDMI signals, if your video displaydevice has an HDMI input, you may make a single HDMIconnection from your source device (such as a DVD player) tothe AVR. In that case, no separate digital audio connection isrequired. Make sure to turn the volume on your television allthe way off.Digital AudioThe AVR 247 is equipped with two HDMI (High-Definition MultimediaInterface) inputs, and one output. HDMI is capable of carrying digitalaudio and video information using a single cable, thus delivering thehighest possible quality picture and sound.There are different versions of HDMI, depending on the capability ofthe source device and the type of signal it is capable of transmittingvia the HDMI connection.In addition, receivers and processors such as the AVR 247 may handlethe incoming signal in several different ways, depending on their capabilityas well. Thanks to its powerful processor, the AVR 247 is capable ofprocessing both the audio and video components of the HDMI data,minimizing the number of cable connections in your system.NOTE: Some multichannel audio devices, such as DVD-Audio,SACD, HD-DVD or Blu-ray Disc players, output some audioformats only through the source’s multichannel analog outputs.These include DVD-Audio players with HDMI version 1.0, andHD-DVD and Blu-ray Disc players that do not decode the digitalaudio. In those cases, make a separate analog audio connectionin addition to the HDMI connection, which is still used for videoor if you wish to listen to Dolby Digital, DTS or PCM materialsthat may be stored on the disc.In addition, the AVR 247 will convert analog video signals to the HDMIformat, upscaling to high-definition 720p resolution. Digital source signalswith 1080i or 1080p resolution are passed via the HDMI Output toyour display at their original high-quality resolution, depending on yourdisplay’s capabilities. You may view the AVR 247’s own on-screendisplay menus using the HDMI output.IMPORTANT NOTE: The AVR 247 cannot convert 1080i or1080p analog video signals to the HDMI format, and downconvertsthem to 720p for the Component Video Outputs. This affects usersof Microsoft® Xbox® 360 systems and some older set-top boxes.If your digital cable television set-top box outputs 1080i or highervideo via component video outputs and is not equipped with anHDMI output, contact your cable operator for a replacement.For Xbox 360 and satellite television customers, either changethe settings on your source device to ensure that it outputs only720p video through its component video outputs, which theAVR can convert to the HDMI format, or connect the AVR’sComponent Video Monitor Outputs to the video display.Although you could connect the source device’s componentvideo outputs directly to your video display, you would then haveto select the correct video input on the display, depending onwhich source input on the AVR was in use.The physical HDMI connection is simple. The connector is shaped foreasy plug-in (see Figure 4). If your video display has a DVI input, youmay use an HDMI-to-DVI adapter (not included) to connect it to the AVR’sHDMI Output. HDMI cable runs are usually limited to about 10 feet.The AVR 247 is Simplay HD-verified for compatibility via the HDMIconnection with other Simplay HD-verified products.Figure 4 – HDMI ConnectionIf your video display or source device is not HDMI-capable, use one ofthe analog video connections (composite, S- or component video) and,if available on your source device, either a coaxial or optical digital audioconnection.Coaxial digital audio jacks are usually color-coded in orange. Althoughthey look similar to analog jacks, they should not be confused, and youshould not connect coaxial digital audio outputs to analog inputs orvice versa. See Figure 5.Figure 5 – Coaxial Digital AudioOptical digital audio connectors are often covered by a shutter to protectthem from dust. The shutter opens as the cable is inserted. Input con-nectors are color-coded using a black shutter, while outputs use a grayshutter. See Figure 6.Figure 6 – Optical Digital AudioDue to the nature of digital signals as binary bits, they aren’t subjectto signal degradation the way analog signals are. Therefore, the qualityof all digital audio connections should be the same, although it is impor-tant to limit the length of the cable. Whichever type of connection youchoose, Harman Kardon recommends that you always select the highestquality cables available within your budget.OpticalOptical digitalaudio cableAudio ConnectionsLeft RightFront (FL/FR)Center (C)Surround (SL/SR)Subwoofer (SUB)Digital Audio ConnectionsCoaxialOptical Output InputVideo ConnectionsComponent Y Pb PrCompositeS-VideoCoaxialCoaxial digitalaudio cableAudio ConnectionsLeft RightFront (FL/FR)Center (C)Surround (SL/SR)Subwoofer (SUB)Digital Audio ConnectionsCoaxialOptical Output InputVideo ConnectionsComponent Y Pb PrCompositeS-Video