Solutions to Common Problems
5
5 Solutions to Common Problems
There are no user configurable settings on the
Cobra TWA
.
In most cases, nearly every issue with the
Cobra
Series can be resolved by
checking the CAT5 termination and making sure that it’s pinned to the 568B
wiring specification. However, there may be other problems that cause the
system to not perform as it’s designed. Below are solutions to the most
common installation errors.
Problem:
No video signal at the receiver.
Solution:
Check that both units are powered.
Ensure Cable Length Compensation adjustments are set
correctly on the receiver
.
Make sure the CAT5 cable is terminated correctly per the 568B
wiring specification.
Is the display device powered on and functioning?
Problem:
Poor video quality.
Solution:
Have all receiver adjustments been performed?
Check all cable connections.
Ensure Cable Length Compensation adjustments are set
correctly on the receiver
.
The video signal’s refresh rate may be set too high for the display.
Reset to a lower refresh rate in your monitor-configuration menu.
Problem:
Poor audio quality.
Solution:
Powered speakers are required. Make sure speaker power is ON.
Check input source levels from the source device. Make sure the
audio source is not overdriven or underdriven.
Problem:
“Green shift” or “green washout” on multimedia signals.
Solution:
The standard video model is designed to function with DC
coupled signals in which the black level is referenced to 0 volts.
Nearly all VGA cards function this way.
Some media servers and VGA DA’s, however, provide AC
coupled signals and can cause a green color shift in the video. This
is a result of the sync clamping on the red and blue channels of the
transmitter/receiver units.
For five-component (RGB/H&V) AC coupled video, the
Cobra
Transmitter unit has been designed with full DC restoration
capability. The
Cobra TWA
may need to be replaced with a
Universal transmitter
