Clear-Com KB-211, User Manual

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KB-211/KB-211GM Two-Channel Speaker Stations Clear-Com Intercom Systems
Rev. A
14
© Clear-Com Intercom Systems 1999
Solution: If only one intercom line is connected, set Option Switch 1 to the ON
or CLOSED position to link both channel switch positions to the same
intercom line.
Scenario 5
A headset extension cord was used.
Solution: Headset extension cords are not recommended.
• VOX problems (KB-211GM only)
Scenario 1
VOX stays tripped (red light on) or the sensitivity is set too high.
Solution: Turn VOX sensitivity control in a counter-clockwise direction.
Scenario 2
VOX will not trip with voice (green light on) or the sensitivity is set too low.
Solution: Turn VOX sensitivity control in a clockwise direction.
Note: VOX is intended for close-in operation.
• Excessive crosstalk
Scenario 1
High DC resistance has a ground return.
Solution: Use heavier cable to add additional conductor(s) to the ground
return. If the cable run is exceptionally long, consider adding and using the
EB-4W 4-Wire Option Module.
Scenario 2
The multi-channel cable pairs are not individually shielded.
Solution: Replace the cable with individually shielded pairs.
Scenario 3
Headset cables are not wired or shielded properly.
Solution: Correct the wiring and use headsets with properly shielded wiring
(see “10—Headset Connector” on page 5).
• Program signal sounds distorted.
Scenario 1
The Program Level control is 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.