3.0 GETTING THE BEST RESULTS
Many factors inuence the quality and reliability of HDMI signal
distribution installations. The following are the main factors to consider,
and basic precautions that will ensure the best possible performance.
• Resolution tracking. Set up the source to output the best resolution
that all TVs are capable of displaying. Follow the instructions in 4.0 to
insure that all TVs connected to the DA receive video signal. If the TVs
have a wide range of resolution capabilities, the highest resolution sets
may not be shown to their best advantage.
• Source resolution and video/sound quality. Sources, such as
satellite recivers or cable boxes can output at low resolutions or deliver
extremely compressed video material that may yield poor results.
Consider the source when planning and troubleshooting your system.
• Output display devices. The quality of the output signal depends
largely upon the type and quality of the HDMI display devices used.
• Distance between the DA sources and the display. Long distances
are possible, but premium quality cables and advanced HDMI
extenders with DDC correction may be necessary for the longest runs.
• Connection cables. HDMI cable design and quality are extremely
important in long cable runs where capacitance can severely degrade
performance. Use premium cables; low quality cables are susceptible
to interference. Always use locking cables or good strain relief
methods to prevent cables from becoming loose over time.
• Interference from nearby electrical devices can have an adverse
effect on signal quality. For example, older computer monitors often
emit very high electromagnetic elds that can interfere with the
performance of nearby video equipment.
4.0 PLANNING A DISTRIBUTION SYSTEM
• Each display should be tested with the source(s) being used to ensure
basic compatibility before connecting them to a distribution amp and/or
switcher. Not all HDMI components and displays are compatible.
• Since all of the displays will be receiving the same video signal
resolution and format (e.g. 1080p@60Hz) from the source, make sure
the source is set up to output the highest resolution that all of the
displays can accept. For instance, if one of the displays connected
to the distribution system can only accept a maximum input resolution
of 720p, all of the displays will receive only 720p video signals. You
may consider creating two or three separate distribution systems
with different sources and different output resolutions so that you can
adequately demonstrate the highest resolution HDTV sets.
