Harman-Kardon AVR 7550HD owner manual Antennas, RS-232 Serial Port

CONNECTIONS

Composite video is the basic connection most commonly available. The jack is usually color-coded yellow, and looks like an analog audio jack. Do not plug a composite video cable into an analog or coaxial digital audio jack, or vice versa. Both the chrominance (color) and luminance (intensity) components of the video signal are transmitted using a single cable. See Figure 10.

Composite video cable

Figure 10 – Composite Video

S-video, or “separate” video, transmits the chrominance and lumi- nance components using separate wires contained within a single cable. The plug on an S-video cable contains four metal pins, plus a plastic guide pin. Align the plug correctly when you insert it into the jack. See Figure 11.

S-video cable

Figure 11 – S-Video

Component video separates the video signal into three compo- nents – one luminance (“Y”) and two sub-sampled color signals (“Pb” and “Pr”) – that are transmitted using three separate cables. See Figure 12.

Y Green

Component	Pb Blue
video cable

Pr Red

Figure 12 – Component Video

If it’s available on your video display, an HDMI connection is recom- mended as the best quality connection, followed by component video, S-video and then composite video.

NOTES:

•Copy-protected sources are not available at the Component Video Monitor Outputs.

•Standard and high-definition analog video signals may be upscaled to 1080i resolution for the Component Video Monitor Outputs. For improved video performance, consider upgrading to an HDMI-capable video display with 1080p resolution.

ANTENNAS

The AVR 7550HD uses separate terminals for the included FM and AM antennas.

The FM antenna uses a 75-ohm F-connector. See Figure 13.

The AM loop antenna needs to be assembled. Connect the two leads to the spring terminals on the receiver. The AM antenna leads have no polarity, and you may connect them to either terminal. See Figure 14.

Figure 14 – AM Antenna

To enjoy XM satellite radio, purchase an XM Ready antenna module and a subscription to the XM service. The XM Mini Tuner and Home Dock Bundle, available at www.xmradio.com, is recommended.

The older Connect-and-Play module is also compatible with the AVR 7550HD, but it may no longer be available. Although you may use a module with standard audio connections, labeled for “car and home use,” you will not be able to enjoy the AVR 7550HD’s ease of control.

RS-232 SERIAL PORT

The RS-232 serial port may be connected to an external computer or control device to allow the external device to transmit control commands to the AVR. The port is bidirectional, so that the AVR can transmit status updates to the control device. Connecting and using the RS-232 port requires technical knowledge, and is best left to a professional custom installer.

Figure 13 – FM Antenna

20