3 Overview
The Kramer VM-4HC is a high quality 1:4 HDMI distributor that accepts
an HDMI input and distributes the signal to up to four outputs, thus making
it a versatile, reliable component in a video system. The VM-4HC
distributes signals having resolutions up to UXGA, including all HDTV
formats.
In particular, the VM-4HC:
• Supports up to 2.25Gbps bandwidth per graphic channel
1
• Equalizes and reclocks the data
• Has I-EDIDPro™ Kramer Intelligent EDID Processing™, an
intelligent EDID handling and processing algorithm that ensures Plug
and Play operation for HDMI systems
• Supports 3D Pass-Thru
• The ability to use a default
2
EDID or acquire the EDID from one
output or from all connected outputs (Auto-mix)
• Includes five HDMI connectors, four output status LEDs, as well as
EDID READ and SELECT buttons
The VM-4HC is housed in a desktop sized enclosure and is fed by a mains
power adapter.
3.1 About HDMI
High-Definition Multimedia Interface (HDMI) is an uncompressed
all-digital
3
audio/video interface, widely supported in the entertainment and
home cinema industry. It delivers the highest high-definition image and
sound quality.
In particular, HDMI
4
:
• Provides a simple
5
interface between any audio/video source, such as
a set-top box, DVD player, or A/V receiver and video monitor, such
as a digital flat LCD / plasma television (DTV), over a single
lengthy
6
cable
1 Suitable for resolutions up to UXGA at 60Hz and for all HD resolutions
2 Lets you use the EDID default value when no display from which to read the EDID is connected
3 Ensuring an all-digital rendering of video without the losses associated with analog interfaces and their unnecessary digital-
to-analog conversions
4 HDMI, the HDMI logo and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI
licensing LLC
5 With video and multi-channel audio combined into a single cable, the cost, complexity, and confusion of multiple cables
currently used in A/V systems is reduced
6 HDMI technology has been designed to use standard copper cable construction at up to 15 m (49ft)
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