Crestron
DM-MD8X8
8x8 DigitalMedia™ Switcher
CresFiber and CresFiber Pro Fiber Optic Cable (Available
Spring 2009)
CresFiber and CresFiber Pro fiber optic cable provides for longer distances between
the DigitalMedia switcher and a DigitalMedia Room Controller without the use of
repeaters or sacrifice in video resolution. For more information, refer to the latest
revision of the Crestron DigitalMedia Design Guide, which is available for download
from the Crestron website.
The following table lists the maximum cable length of CresFiber cable versus
CresFiber Pro cable.
Maximum Length Using CresFiber and Other Fiber Optic Cable
RESOLUTION CresFiber
CresFiber
Pro
1080i / 720p / 1080p @24 Hz
1024 x 768 @ 75 Hz
1280 x 1024 @ 75 Hz
1600 x 1200 @ 60 Hz
1920 x 1200 @ 60 Hz
1080p @ 60 Hz
1080p @ 60 Hz, Deep Color
1000’
(304 m)
3280’
(1 km)
Other fiber optic cable can be used as well.
NOTE:
1080p @ 60 Hz is the most common resolution used in residential
installations.
NOTE:
Deep Color is part of the HDMI 1.3a specification. It allows devices to
transmit video using 36 bits per pixel instead of 24 bits per pixel. The color depth
allows for 4096 shades each of red, green, and blue (instead of 256). Due to
bandwidth requirements and limited support, Deep Color is not often used.
For more information on CresFiber, CresFiber Pro and other cable products, visit the
Crestron website (http://www.crestron.com/wireoverview).
HDCP Signal Path
Sources using HDCP limit the number of display devices it can transmit to while
simultaneously limiting the depth of devices in the signal path. Too many devices or
greater-than-allowed depth in a signal path (from source to display) may create
problems with displaying of audio and video content. The HDCP specification states
that the maximum depth of devices between source and display is six. Some
examples are shown in the following diagram.
Operations Guide – DOC. 6755A
8x8 DigitalMedia™ Switcher: DM-MD8X8
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