TELIKOU
WS-200 Two-Channel Recessed Speaker Station
7
Cause 2: Sidetone null control at this station or a remote station is not adjusted correctly
Solution 2: Adjust. Refer to the procedure in the Front Panel section of this manual.
Cause 3: Channel unterminated.
Solution 3: Set the SPK-200 termination switch to the ON position.
Cause 4: A headset cord is too long or jointing quality.
Solution 4: Check headset cord
Problem: Excessive crosstalk
Cause 1: High DC resistance in ground return.
Solution 1: Use heavier cable; add additional conductor(s) to ground return.
Cause 2: Headset cables are not wired properly or shielded properly.
Solution 2: Correct wiring. Use headsets with properly shielded wiring.
Problem: Hum or buzz in system
Cause 1: Be earth-free or imperfect earth.
Solution 1: Check the plug, and make sure it is perfect earth.
Cause2: Inductive pickup caused by close proximity of this main station or connected remote
stations to power lines or transformers.
Solution2: Relocate the offending unit.
Cause 3: Intercom line cable is not wired properly; the shield of microphone cable is not connected
to Pin-1 of 3-XLR
Solution 3
: Check intercom line cable. Make sure all the cables’ Pin-1 of 3-XLR connects correctly.
V. Technical Specification
PRE-AMP:
Microphone impedance: Dynamic 200ohm
Gain form Mic to intercom line: +49dB
Bandwidth: 40Hz-8000Hz ±2dB
POSTPOSITION-AMP:
Load impedance: 50-2000ohm
Output level: +17dBv
