Cambridge Audio 640R Assigning any Hdmi or DVI sources, Video connection type, Hdmi Pre-Emphasis

Video connection type

The 640R provides transcoding or conversion between Composite, S- Video or Component video formats. This function is very useful in that it allows for a single analog connection type to be made to the TV/Monitor even if different input video connection types are used for different source inputs. As with the video inputs, the best output connection type to make to the TV/Monitor is (in declining order of quality) Component, then S-Video then Composite.

When you set the Input Video type the 640R also automatically selects a transcoding mode as shown in the table below:

			MONITOR/TV OUTPUT TYPE
		Composite	S-Video	Component
	Composite	DIRECT	Transcoded	Transcoded
TYPE
INPUT		Composite	S-Video	Component
VIDEO	S-Video	Transcoded	DIRECT	Transcoded
SELECTED		Composite	S-Video	Component

Component Direct Direct DIRECT

This setting is remembered input by input. It can be seen that whatever the input video type, the 640R is able to provide Composite, S-Video and Component outputs concurrently. All that is required is to tell the 640R which input type you are using.

This is done be selecting each source (DVD, Video1 etc.) from the front panel (OSD off) and then pressing the Video Input Type button. This cycles round the three types of analog video connections that can be made on the 640R:

1.Composite Video (CVBS)

2.S-Video (S-VHS, Y/C)

3.Component Video (YCbCr / YPbPr, YUV)

For best picture quality we recommend making Component video connections, then in declining order of quality, S-Video connections and then Composite video connections.

If a digital video connection (HDMI or DVI) is available this is even better than Component and should be set in Step 5. For sources where you wish to use HDMI or DVI, just set the video type to Composite for now.

azur	640R
5. Assigning any HDMI (or DVI) sources		ENGLISH
The 640R has 3 HMDI (High Definition Multi-Media Interface) inputs and

one HDMI output. HDMI is a fully digital audio/video system that passes the picture and audio to the screen in digital format for best possible picture quality. DVI (Digital Video Interface) is a subset of HDMI that uses different connectors and only passes digital video to the TV/Monitor (no audio). The 640R is fully compatible with DVI in that simple passive DVI-HDMI adaptors are available which allow the conversion of the DVI connector to an HDMI format connector (and back again if required) for routing via the 640R. The 640R can switch both types of signal.

HDMI/DVI (henceforth referred to as HDMI) outputs on DVD players and Set-top boxes also often support higher resolution formats including progressive scan types. Consult both your HDMI source and TV manuals for details, it is often possible to select from various options, you will want to select the highest quality output that both your source and TV are compatible with.

The 640R performs HDMI switching, not processing, it routes the HDMI signals from the source equipment to the TV/Monitor without any processing, so as far as the 640R is concerned there is no setup involved other than to assign the three inputs to a desired source. The 640R does not receive audio or video over the HDMI so for surround- sound decoding etc. an audio connection must also be made from your HDMI source to the 640R. As with other sources this can be analog or digital audio. A digital audio SPDIF/Toslink connection is preferred and will be required if it is desired to decode surround-sound for the HDMI sources.

Each of the three HDMI inputs can be freely assigned to the DVD, Recorder 1, Video 1 or Video 2 inputs in the OSD. Select the ‘HDMI Setup/Assign’ menu:

HDMI Setup/Assign Menu

HDMI1	: Rec 1
HDMI2	: DVD
HDMI3	: Video2
HDMI Out	: Pre.emph.
Return To Menu		: [OSD]

Highlight each HDMI input in turn and assign it to one of the 4 possible options (with the Left and Right arrows).

HDMI Pre-Emphasis

There is also an option for HDMI Output Pre-Emphasis. The HDMI interface is generally specified for transmission over cable lengths up to 5m. Longer cable runs can sometimes be accommodated if very high quality HDMI cables are used. The 640R is able to apply some pre- emphasis to the HDMI signals to allow for cable losses in such situations. For cable runs less than 5m HDMI Out should generally be ‘Normal’. For runs greater than 5m HDMI Out should be ‘PreEmph’.

Note: The maximum cable length possible depends on cable quality and to some extent on the resolution of the video being transmitted (i.e. higher bit rate signals are harder to transmit over long distances). Use only good quality HDMI cables. Poor quality cables can have problems with HDMI at only 5m and only very high quality cables will work at distances over 5m.

Highlight ‘HDMI Out’ and select either ‘Normal’ or ‘PreEmph’ mode:

HDMI Setup/Assign Menu

HDMI1	: Rec 1
HDMI2	: DVD
HDMI3	: Video2
HDMI Out	: Normal
Return To Menu		: [OSD]

Press the OSD button to exit the menu.

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