Harman Kardon AVR 245 Service Manual Download Page 16

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CONNECTIONS

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Digital Video Connections

The AVR 245 is equipped with two HDMI (High-Definition Multimedia
Interface) inputs, and one output. HDMI is capable of carrying digital
audio and video information using a single cable, thus delivering the
highest possible quality picture and sound.

There are different versions of HDMI, depending on the capability of the
source device and the type of signal it is capable of transmitting via the
HDMI connection.

In addition, receivers and processors such as the AVR 245 may handle
the incoming signal in several different ways, depending on their capabil-
ity as well. The AVR 245 is only capable of switching the HDMI data.
That is, the incoming audio and video data will be passed directly to
your HDMI-capable video display, without the AVR 245 processing any
of the data. Although this enables the AVR 245 to be compatible with
virtually any HDMI-capable source device and video display, it requires a
separate audio connection for each source since the AVR 245 doesn’t
have access to the audio data in the HDMI stream.

The AVR 245 will not convert analog video signals to the HDMI format,
and the on-screen displays are not visible when using an HDMI source.
Therefore, you will need to connect the component, composite or S-
video monitor output to your video display (or both, depending on which
video connections your sources use).

The physical HDMI connection is simple. The connector is shaped for
easy plug-in (see Figure 9). If your video display has a DVI input, you
may use an HDMI-to-DVI adapter (not included) to connect it to the
AVR’s HDMI Output.

Figure 9 – HDMI Connection

Analog Video Connections

There are three types of analog video connections: composite video,
S-video and component video.

Composite video is the basic connection most commonly available. The
jack is usually color-coded yellow, and looks like an analog audio jack,
although it is important never to confuse the two. Do not plug a com-
posite video cable into an analog or coaxial digital audio jack, or vice
versa. Both the chrominance (color) and luminance (intensity) compo-
nents of the video signal are transmitted using a single cable. See
Figure 10.

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. Be careful to line up the plug correctly when you insert it into the
jack on the receiver, source or video display. See Figure 11.

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 col-
ored red. See Figure 12.

Figure 12 – Component Video

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

Antennas

The AVR 245 uses separate terminals for the included FM and AM
antennas that provide proper reception for the tuner.

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

Figure 13 – FM Antenna

The AM loop antenna needs to be assembled. Then connect the two
leads to the screw terminals on the receiver. See Figure 14.

Figure 14 – AM Antenna

RS-232 Serial Port

The RS-232 serial port on the AVR 245 is used only for data. If
Harman Kardon releases a software upgrade for the receiver’s operating
system at some time in the future, the upgrade may be downloaded
to the AVR using this port. Complete instructions will be provided at
that time.

AVR245