Extron Electronics IN3058 - Manual (Page 7)

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©1996-1997 - INLINE, INC. IN3056 / IN3058 OPERATION MANUAL - REV. 2.3 02/19/00
OPERATION
The IN3056 and IN3058 are designed to distribute and extend video signals in the S-Video (Y/C) format.
These units include controls for Chroma and Luma which can be used to optimize the output signal and
compensate for cable losses, extending a video signal as far as 300 feet without any degradation of the
signal. The actual usable drive distance depends greatly on the type of cable used for the long cable runs.
The Luma control affects the contrast, and the Chroma control adjusts the color level. Please note that
most display devices include an AGC circuit which automatically adjusts the Chroma level. In many
installations, no visible change of color saturation will be observed when adjusting the Chroma level
control because the AGC circuit in the display device is acting contrary to the level changes made by the
user to the IN3056 / IN3058 Chroma level control.
INTERNAL CONTROLS
The IN3056 and IN3058 internal Chroma and Luma level controls may be accessed using the following
procedure:
1. Remove the screw from the bottom of the unit.
2. Slide the top cover off.
3. Locate the Chroma and Luma controls (see diagrams below) and gently adjust as required
using a small plastic straight slot adjustment tool. Turn the controls counter-clockwise to
increase the gain and clockwise to decrease the gain. Note the following differences between the
two models:
IN3056
One Chroma Gain Control and One Luma Gain Control affect all four outputs
IN3058 Two Chroma Gain Controls and Two Luma Gain Controls are provided.
Each control affects four outputs (outputs 1 - 4 or outputs 5 - 8).
4. Replace the top cover and tighten the bottom screw.