5 Solutions to Common Problems
There are no user configurable settings on the Cobra TA Video / Audio
Transmitter. In most cases, nearly every issue with the Cobra Series can be
resolved by checking the CAT5 termination and making sure that it is pinned
to the 568B wiring specification. However, there may be other problems that
cause the system to not perform as it is 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?
Note, that if cable EQ adjustment is too high, or too low, for a
given cable length, an image may not appear.
Problem:
Poor video quality.
Solution:
Have all receiver adjustments been finished?
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 DAs, 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.
