Telikou BK-501 User manual

TELIKOU Intercom System
BK-501 Belt Pack
Instruction Manual
© 2006 TELIKOU Systems
All Rights Reserved
www.telikou.com

TELIKOU BK-501 Belt Pack
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Introduction
Thank you for choosing TELIKOU intercom product. BK-501 beltpack can work with any
TELIKOU Intercom standard main station, and it is suitable for TV station, communication
command center, outside broadcast van, show, project test field, and other applications
where communication is required.
This system adopts wired connection, and has following features, free of external
emission interference, stable and reliable performance, flexible configuration, full-duplex
communication, clear and loud communication sound, easy operation, and strong noise
resistance.
Quick start
1. Connect the BK-501 belt pack to an intercom main station by XLR-3 cable. If belt pack
receives DC power, the Power LED will light.
2. Turn volume control knob to the end by anticlockwise rotation, then plug in the headset.
3. Press ‘Mic’ button will light the green indicator which indicates the microphone is turned
on.
4. Adjust sidetone (Sidetone adjustment is next to the belt-clip) and volume level; make
sure the voice level which you heard from earphone is the minimum.
5. Press Call button to send a signal to main station.
6. When the communication is finished, press ‘Mic’ button again to turn off the
microphone. The microphone indicator will off as well.

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Basic operation
1. Talk Button
1. Mic Button
Mic button is a momentary button. Holding the Mic button turns on the microphone of
connected headset and the microphone indication LED.
2. Call Button
Pressing call button will send a call signal to the intercom system. And red LED indicator
above will light.
3. Volume Control
This control is used to adjust the volume level which heard from connected headset.
4. Power LED
A green LED indicator indicates if BK-500 is powered.
5. Mic LED
A green LED indicator is controlled by Mic button..
6. Call LED
A red LED indicator indicates a call signal when received from the intercom system. It
means a talk request from some station.
7. Headset connector
XLR-4M/5F connector
Pin out configuration as follow:
Pin 1--Head Microphone common
Pin 2--Head Microphone hot
Pin 3--Earphone common
Pin 4--Earphone hot
Pin 5--Null
8. Intercom cable connectors
A pair of internal parallel connected XLR-3 connectors is set for loop through connection
of the intercom station.
Pin out configuration as follow:
Pin 1--Common

TELIKOU BK-501 Belt Pack
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Pin 2--DC supply（15-30V）
Pin 3--Audio signal
Troubleshooting
Problem: Listen level too high or too low
Cause 1: More than one Terminal in the system or non Terminal
Solution 1: Check every channel, each channel must only have one Terminal.
Problem: Microphone level too high or too low
Cause 1: Mouth is far or close to the mouth
Solution 1: Adjust the distance between microphone and mouth
Problem: System feedback (Acoustical)
Cause 1: Listen level control at this station or a remote station is set too high
Solution 1: Adjust
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 un-terminated.
Solution 3: Set the MS-800 termination switch to the ON position.
Cause 3: A headset cord is too long or jointing quality.
Solution 3: Check headset cord
Problem: Can not turn on the Mic function
Cause 1: The connection among TELIKOU main stations must go via Online connector
on rear panel. The Online connector of this station connected to the Intercom Line
connector of another station.
Solution 1: Check the connection of Online connector
Specifications
1. Pre- Amplifier (From Microphone to Line)
Dynamic Headset Mic impedance: 200 ohm
Voltage Gain: 49±3dB
Bandwidth: 40Hz-8000Hz ±2dB

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2. Headphone Amplifier (From Line to Load)
Load impedance: 50-600 ohm
Voltage Gain: 31±3dB
Harmonic Distortion: <0.1 %( 1000Hz)
Bandwidth: 200Hz-8000Hz ±2dB
3. Others
SNR: >72dB
Current: <120mA
Power Range: 12-30V DC
Environment: -10~55°C
Dimension: 105mm x 87mm x 48mm