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Setup and Installation
7
4.5 Video Adjustment
4.5.1 Cable Distance Compensation Settings
To get the highest quality video signals from your Cobra CAT 5 Video
System, follow the instructions and diagrams below:
NOTE: TURN KNOB SLOWLY DURING ADJUSMENT PROCEDURE. Turning
too fast may result in missing the proper EQ setting resulting in picture loss.
To Reset EQ and Skew values to 0, remove power from R1300A / R1300S2,
Push and hold EQ/Skew Knob in and re-apply power.
1. Display a test pattern consisting of a black box on a white background.
Press and hold briefly, and then release the EQ/Skew knob so that the
R/G/B LED is flashing white.
2. Turn the EQ/Skew knob clockwise until the shadow next to the black box
just disappears. The brightness in the white area should be the same as the
white area above and below the black box. Continue turning the knob for
best picture quality. Note, that if the EQ setting is too high or too low, you
may not get an image. Adjust the EQ settings until an image appears, and
then adjust for best picture quality.
3. Press and hold briefly, and then release the EQ/Skew knob until the
R/G/B LED is solid green.
Figure 5: Adjustment locations
4.5.2 Skew Compensation Settings
The R1300A / R1300S2 receiver is available with an optional skew
compensation module to adjust for signal timing differences due to differing
pair lengths within the CAT 5 cable. Using the delay signals, skew may be
compensated from 2 to 65 nanoseconds in 2 nanosecond increments on each
individual color pair. If skew compensation is required, but the skew comp
module is not installed, call for technical assistance.