Antennas; Rs-232 Serial Port - Harman Kardon AVR 3550HD Owner's Manual

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 luminance
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 components –
one luminance ("Y") and two sub-sampled color signals ("Pb" and "Pr") –
that are transmitted using three separate cables. The "Y" cable is color-
coded green, the "Pb" cable is colored blue and the "Pr" cable is
colored red. See Figure 12.
Component
video cable
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 are 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 3550HD uses separate terminals for the included FM and AM
antennas.
The FM antenna uses a 75-ohm F-connector. See Figure 13.
Figure 13 – FM Antenna
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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. We recommend the XM Mini
Tuner and Home Dock Bundle, available at www.xmradio.com. The older
Connect-and-Play module is also compatible with the AVR 3550HD,
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 3550HD's ease of control.

RS-232 Serial Port

The RS-232 serial port on the AVR 3550HD is used only for software
upgrades. If an upgrade for the receiver's operating system is released
in the future, it may be downloaded to the AVR using this port. Complete
instructions will be provided at that time.
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