ClearCom KB-212 Manual de usuario descargar pdf (Pagina 12)

Clear-Com Intercom Systems KB-212 Speaker Station

Rev. B

Scenario 2

Channel unterminated.

Solution: Set the Main Station or Power Supply termination switch for the

appropriate channel to the ON position.

Scenario 3

The KB-212’s microphone is too close to an open speaker on the same

channel.

Solution: Change the units’ location.

•

Excessive crosstalk

Scenario 1

High DC resistance in ground return.

Solution: Use heavier cable; add additional conductor(s) to ground return. If

the cable run is exceptionally long, consider adding and using the EB-4W 4-

Wire Option Module.

Scenario 2

Multi-channel cable pairs are not individually shielded.

Solution: Replace cable with individually shielded pairs.

•

Program signal sounds distorted.

Scenario 1

Program Level control set too high.

Solution: Turn the Program Level control counter-clockwise.

Scenario 2

Overload of Program Input circuit.

Solution: Reduce the gain of the program signal at the source, such as an

audio mixer.

•

The call signal does not function.

Scenario 1

Excessive DC loading of intercom line.

Solution: Remove any audio transformers or other equipment that may be

connected across the intercom line. If equipment other than Clear-Com

intercom equipment must be connected to the intercom line, please contact

Clear-Com application or service personnel for information or

recommendations.

Scenario 2

Far too many terminations on the intercom line.

Solution: Check all main stations and power supplies to make sure each

intercom channel is terminated at only one point.

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ClearCom KB-212 Manual de usuario Pagina 12