Black Box COMPACT CAT5 AUDIO/VIDEO SPLITTERS, AC154A-2 manual Troubleshooting, Problem Solving FAQ

Compact CAT5 Audio/Video Splitter

4.Troubleshooting

4.1Problem Solving FAQ

1.Fuzzy, blurry, or ghosting image at remote location

If you have a stable image but it looks somewhat blurry (object or character edges are not sharp), make sure that you have set the receiver unit’s compensation switches correctly. Also check table 3.1 to see that you have not exceeded the maximum cable length recommendation. If you still have a fuzzy image, try reducing the refresh rate and/or resolution of the PC. You can also try CAT5e or higher with improved bandwidths (as long as the pairs are terminated as standard EIA/TIA 568B).

If too much compensation is applied at the receiver, a bright and ghosting image may result. In this case try reducing the amount of compensation.

2.Image exhibits steady or rolling horizontal color “hum” bars

This is usually an indication of improper grounding either at the sending end, the receiving end, or both. Verify that the AC line is properly wired and that a protective ground (green) wire is established with NO potential difference between both the sender and receiver locations. The UTP splitter can tolerate up to 5 v peak-to-peak ground noise between the two locations, but no more.

The splitters and receivers rely on the equipment that are connected to them to establish a good ground reference. Most monitors and PC’s are well grounded to the power-line through their 3-Prong AC cord. However some Notebooks and LCD’s may be completely floating even when an external power supply is plugged into them. In this case, you must add a wire from the splitter or receiver to “earth” ground. The VGA and Audio connector shells and their respective hardware are all tied to unit’s internal ground and can be used to establish a connection to power-line ground.

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