Overview
3
3 Overview
The Kramer VM-4H is a high quality 1:4 HDMI distributor that accepts an
HDMI input and distributes the signal to four outputs, allowing one or more
of the outputs to be connected to receiving devices, thus making it a
versatile, reliable component in a video system. The VM-4H distributes
signals having resolutions up to UXGA, including all HDTV formats.
In particular, the VM-4H:
• 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
• Can read and store, in non-volatile memory, the EDID
2
block
from one or more outputs, so it can then provide the EDID
information to the HDMI source even if the display device is not
connected
• Includes five HDMI connectors, four output status LEDs, an
active status LED, as well as EDID read and select buttons
The VM-4H is housed in a 19" 1U rack-mountable enclosure, and is fed
from a 100-264V AC universal switching power supply.
3.1 About HDMI
High-Definition Multimedia Interface (HDMI) is an unco
mpressed all-digital
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audio/video interface, widely supported in the entertainment and home
cinema industry. It delivers the highest high-definition image and sound
quality.
1 Suitable for resolutions up to UXGA at 60Hz, and for all HD resolutions
2 EDID is Extended Display Identification Data
3 Ensuring an all-digital rendering of video without the losses associated with analog interfaces and their unnecessary digital-
to-analog conversions
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