Kramer F-021 [4/14] Overview

KRAMER: SIMPLE CREATIVE TECHNOLOGY

Overview

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)