KRAMER: SIMPLE CREATIVE TECHNOLOGY
Overview
2
3
Overview
The
F-021
XGA / Audio Line Amplifier
Mounting Box
for Ackermann floor
boxes is an XGA / Audio line amplifier for computer graphics video signals
up to UXGA and balanced stereo audio. It includes two adjacent openings
for Kramer inserts: two single Kramer inserts, or one dual Kramer insert.
The
F-021
features:
•
A resolution of up to UXGA
•
A built-in audio amplifier
•
An SDA (Serial Data) and SCL (Serial Clock) terminal block connector
to pass the EDID information via pins 12 and 15 respectively, on the
15-pin HD connector
•
EQ. control for the XGA output
•
Left and right audio level trimmers to adjust the output audio level
•
A 12V DC power supply
3.1
DDC Support
When establishing a VGA connection between a PC or laptop and a display
device, a set of parameters known as EDID is exchanged between them, which
is carried over the DDC channel. In some PC graphic cards and laptops, this
information exchange is essential for proper VGA OUT operation.
3.2
Defining EDID
The Extended Display Identification Data (EDID
) is a data-structure provided
by a display to describe its capabilities to a graphics card (that is connected to
the display’s source). The EDID enables the
F-021
to “know” what kind of
monitor is connected to the output. The EDID includes the manufacturer’s
name, product type, timing data supported by the display, display size,
luminance data and (for digital displays only) the pixel mapping data.
1 Defined by a standard published by the Video Electronics Standards Association (VESA)
