Telikou MS-200 User manual

TELIKOU Intercom System
MS-200 Main Station
Instruction Manual
© 2006 TELIKOU Systems
All Rights Reserved
While
TELIKOU makes every attempt to maintain the accuracy of the information contained in
its product manuals, that information is subject to change without notice

TELIKOU MS-200 Two Channel Main Station
I. Introduction
Thank you for choosing TELIKOU intercom product. The MS-200 two-channel main station is a
powerful, yet user friendly unit that server as a heart of a TELIKOU intercom system. We
recommend you read through this manual to better understand the function of MS-200. If you
have any question that does not addressed on this manual, please contact your dealer or call us.
We are standing by to assist you.
Description
The MS-200 is a two channel, one rack space main station suitable for TV station,
communication command center, outside broadcast vehicle, theater, project test field, and
other applications which 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.
II. Characteristics
zAll operations can be finished on panel easily.
zAnnouncer can send signal from microphone of host to external device.
zThe program input will interrupt during talk.
zRemote Microphone kill Switch (RMK).
zThe level of speaker will lower when talk button is activated.
zXLR and 1/4 inch compatible microphone jack.
zAutomatic circuit short protection and indication.
zSidetone Null adjustment.
III. Basic operations
Front Panel
1. Mic Select Switch
Set the Mic select switch to select whether the panel microphone or the headset microphone is
active.
1

TELIKOU MS-200 Two Channel Main Station
2
2. Listen Level Control
Turn this control to set the listen level of received audio signal within communication system.
It adjusts listen level of headset and speaker. Turn the control completely counterclockwise to
silence the channel.
3. Call Switch
Send call signal from host to the selected channel which talk switch is ON. Turn up or down the
handle of call switch, the LED above selected channel will light (RED). This switch is without
self-locking function, release and reset.
4. Talk Switches (Talk With)
Turn the talk switch handle up or down can talk to the corresponding channel. When the switch
is turned to ON or PTT, the LED above will light (GREEN). The settings are as follow:
ON: The corresponding channel is activated, the switch is self-locked.
OFF: The corresponding channel is off.
PTT: The corresponding channel is activated, release and reset.
5. Announce Switch (ANN)
Send the audio from selected microphone to the ANN. OUT rear back. When the switch is turned
to ON or PTT, the LED above will light. The settings are as follow:
ON: Send the audio from selected microphone to the ANN. OUT rear back, the switch
is self-locked.
OFF: break the connection between selected microphone and ANN.OUT rear back.
PTT: Send the audio from selected microphone to the ANN. OUT rear back, release and
reset.
6. Program Feed To
Turn the switch up or down will send the external input signal to intercom channel. Each
channel has corresponding control handle. The settings are as follow:
ON: The corresponding channel receives program signal from Program Input at rear
panel.
OFF: The corresponding channel can not receive program signal.
INT: The corresponding channel receives program signal from Program Input at rear
panel. If Talk Switch is turned ON, the program signal will automatic interrupted.
When the switch is turned ON or INT, the LED above will light.
7. Program Level Control

TELIKOU MS-200 Two Channel Main Station
3
Adjust this control to set the program audio level sent into intercom channel by clockwise or
counterclockwise direction.
8. Program Listen Level Control
Adjust this control to set the program audio level heard from the headset and panel speaker.
9. Tone Alert Level Control
When MS-200 receives a call signal from belt pack or other stations, an internal buzzer will sent
a hum to panel speaker and earphone. This knob adjusts the hum level.
10. Speaker Switch
The Speaker Switch turns the front panel speaker on or off.
11. Power LED
This green LED lights on when the MS-200 is receiving AC power and the power switch on the
rear panel is turned on.
12. Link (A+B)
When this switch is set to the Off position. Channel A and Channel B are individual and they can
not communicate to each other.
When this switch is set to the ON position. The LED indicator right above this switch will light.
Channel A and Channel B are connected to each other. Under this situation, all the user station
on Channel B are added to Channel A. And the Channel B controls and switches will be inactive.
The Sidetone zero-adjusting for Channel A may required some readjustment.
13. Link (A+B) LED:
This green LED is lit when the Link (A+B) switch is ON, to provide a visual indication that party
line Channels A and B are linked together.
14. Sidetone zero-adjusting
The MS-200 uses full-duplex audio (the same as a conventional telephone line) in which the talk
and listen audio are sent and received on the same line. Thus, when you talk on a channel, you
will also here your own voice back in the speaker or headphones. This is called sidetone. If you
are using the MS-200 with a microphone and speaker, sidetone could cause unwanted feedback,
since the microphone may pick up your returned voice audio and reamplify it. This could also
happen if you are using a headset where the ear cushions do not completely cover the ears,
although it is probably much less likely. In either of these cases, you should minimize the
amount of sidetone.
Typically, different sidetone null settings are needed depending upon whether you are using the

TELIKOU MS-200 Two Channel Main Station
4
gooseneck panel microphone along with the speaker or not. Use one the following procedures
to correctly set the sidetone level controls.
A) Sidetone Adjustment Procedure for Gooseneck Microphone with Speaker turned
on:
1 Turn off the Party Line Link (A+B) switch.
2 Turn off all the microphones on sub-stations and belt packs.
3 Set Mic select switch to panel.
4 Turn the Level control for Channel B all the way down. Set the level control for Channel A to
a comfortable level.
5 Press the Channel A Talk button and speak into the microphone while turning the sidetone
null control slowly back and forth. There should be a point where your voice (and any
accompanying acoustic feedback) is the lowest. This is the null point.
6 Repeat this procedure for Channel B by turning the Channel A Level control down and
adjusting the Channel B controls.
B) Sidetone Adjustment Procedure for Headset:
1 Turn off the Party Line Link (A+B) switch.
2 Turn off all the microphones on sub-stations and belt packs.
3 Set Mic select switch to headset.
4 Turn the Level control for Channel B all the way down. Set the level control for Channel A to
a comfortable level.
5 Press the Channel A Talk button and speak into the microphone while turning the sidetone
null control slowly back and forth. There should be a point where your voice (and any
accompanying acoustic feedback) is the lowest. This is the null point.
6 Repeat this procedure for Channel B by turning the Channel A Level control down and
adjusting the Channel B controls.
C) System Sidetone Adjustment
1 Turn off all the microphones on sub-stations and belt packs.
2 Followed by A) and B), adjust sidetone for MS-200 main station.
3 Adjust sub-station and belt pack’s sidetone one by one to satisfied level.
15. Feed To LED
This LED lights when Program Feed To function is set to ON or INT.
16. Announcement LED (ANN.LED)
This LED lights when announcement switch is enabled.

TELIKOU MS-200 Two Channel Main Station
5
17. Call LED
Each call LED corresponds to one channel. This LED will light under two cases: a) called: when
the call signal from communication channel is received; b) call: if you want to call a channel,
please turn on switch 2 corresponding to this channel, turn on call switch 4, and then the call
LED for this channel will be lit. At the same time, the host will send call signal to this channel
directly.
18. Talk LED
This LED lights when Talk switch turns to ON or PTT
19. Remote Mic Kill Switch
The Remote Mic Kill (RMK) switch will turn off the microphone of every beltpack remotely. If the
Talk Functions of a large number of beltpacks have inadvertently been left activated, incidental
noise and talking can make it difficult or impossible to communicate on the intercom system.
The Remote Mic Kill switch can be pressed to quiet the line in this situation.
Notice: if any beltpack microphone within intercom line can be turned off in remote way, each
powered working station within this intercom system must be interconnected via online
interface on its rear panel.
20. Panel Mic Gain
It is used to increase or decrease the gain for panel microphone to achieve proper microphone
output level. It has no effect on the sensitivity of the headset microphone.
Note: For earlier models, this adjustment button is in cabinet, and you can find this
adjustment potentiometer at the right side of front panel after opening the top cover of cabinet.
The microphone is set according to the Electret type before delivery. If the type of panel
microphone is changed, re-adjustment is required.
21. Panel Mic Connector
This is a double-purpose connector, supports both of microphone with XLR plug and 1/4inch
plug.
The wiring of 3-pin XLR microphone to be as follow :
Pin 1 -- Mic common
Pin 2 -- Mic hot
Pin 3 -- parallel connected with Pin 2 internal
22. Headset connector
4-pin XLR Male or 5-pin XLR female connector.
EARPHONE: Dynamic 50-2000 ohm
MICROPHONE: Dynamic 100-600 ohm
The wiring of headset to be as follow:
Pin 1--Mic common

TELIKOU MS-200 Two Channel Main Station
6
Pin 2--Mic hot
Pin 3--headphone common
Pin 4--headphone hot
Pin 5—Null
23. Power Switch
The Power Switch can be used to turn AC power to the MS-200 on or off.
Rear Panel
24. Online Connector
It is used for online function among TELIKOU working main stations. If there are more than one
TELIKOU main station are connected by Online Connector in the system, pressing RMK button
on any main station kills all the MIC of belt packs. All the TELIKOU main stations are can be
connected by Intercom Line Connector as well. But under this condition, pressing RMK button
on any main station will not affect other belt packs which are not directly connect to this main
station. This is a 3-Pin XLR male.
The pinout of Online Connector is as follows:
Pin 1 --- Common (Shield)
Pin 2 --- Control Signal
Pin 3 --- Audio Signal
Notice:
1. This connector can only work with TELIKOU main station. It is not allowed to connect this
interface to intercom cable connector (Intercom Line); otherwise, the system will not work
properly.
2. Intercom Line connector is used to connect those main stations are not TELIKU. On this
situation, RMK function only can work with belt packs which are connected to TELIKOU main
stations.
25. Intercom Line connector
3-pin XLR female socket
The pinout of the intercom connectors is as follows:
Pin 1 --- Common (Shield)
Pin 2 --- Power (+24 VDC)
Pin 3 --- Audio
26. Termination switch
When this switch is turned to ON position, one 220 ohm termination resistor will be connected to
intercom line. If the intercom system is not terminated, the level of intercom line will be too high,
and the system stability will be influenced. However, only one termination point is allowed

TELIKOU MS-200 Two Channel Main Station
7
within same intercom line. If multiple termination points are used incorrectly, the driving load
will be aggravated, and the level of intercom line will be too low.
This switch is set to ON position by factory default. Before using, you should set it to ON or OFF
position according to the actual connection of intercom line.
27. AC Power Connection
Input 90V-260V, 50-60Hz AC, and the power consumption is less than 95VA.
28. Program Input
A 3-pin XLR female connector provides balanced input to the station. It activates when Program
Feed To switch turned on. The external program signal is sent into intercom line. The program
level can be adjusted by the Program Level Control. When Microphone Switch is activated, this
program input is automatically cut off.
The pinout of the Program Input connector is as follows:
Pin 1 --- Common (Shield)
Pin 2 --- + Audio
Pin 3 --- - Audio
29. Announce Out
This connector is 3-pin XLR male. Press the Announce button to make stage or PA system
announcements. It directs the audio from the selected headset or panel microphone to the Ann
Out rear panel connector. The output impedance is 600 ohm for balanced output.
The pinout of Announce Out is as follows:
Pin 1 --- Common (Shield)
Pin 2 --- +Audio
Pin 3 --- -Audio
IV. Installation and cable
1. Installation
MS-200 main workstation adopts 19-inches 1U cabinet, and this workstation can be mounted on
rack or placed on desktop. If it is placed on desktop, it is required to adhere 4 rubber foot pads
provided with machine to four corners at the bottom of cabinet with double-face adhesive tape.
2. Intercom cable
A). Rules for cable selection
TELIKOU intercom system adopts double-core shielded audio cable, one core is used for
transmitting audio signal, another core is used for transmitting DC power or control signal, and
the shielded layer is used as common line for audio and power supply. To decrease resistance of

TELIKOU MS-200 Two Channel Main Station
8
common line and crosstalk interference, the cable with larger cross section area should be used.
When it is used in fixed way, the cross section area of single line should be at least 1.5mm2,
when it is used in mobile mode, the cross section area of single line should be at least 0.75mm2.
When the cable is longer, the cross section area of cable should be larger. If the cable has more
than 2 cores, it is recommended to use the additional core as common line.
B). Cable connection
The standard TELIKOU intercom cable is connected with a pair of 3-pin XLR connectors, one
male and one female. If longer cable is required, you can connect several cables together with
head-end method.
The wiring of connector is as follows:
Pin 1 --- Common (Shield)
Pin 2 --- Power or Control Signal
Pin 3 --- Audio Signal
Notice: the pin-1 GND connection for each XLR connector must be insulated from cabinet, and
cannot be connected to shell of XLR connector.
V Troubleshooting
Problem: Power LED wink
Cause 1: Direct short on the intercom channel
Solution 1: Remove all the intercom cables from MS-200. Check each channel one by one, until
find the short channel.
Cause 2: Overload
Solution 2: Decrease the amount of remote stations.
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-200 termination switch to the ON position.
Cause 3: A headset cord is too long or jointing quality .

TELIKOU MS-200 Two Channel Main Station
Solution 3: 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: Inductive pickup caused by close proximity of this main station or connected remote
stations to power lines or transformers.
Solution 1: Relocate the offending unit.
Cause 2: Intercom line cable is not wired properly; the shield of microphone cable is not
connected to Pin-1 of 3-XLR
Solution 2: Check intercom line cable. Make sure all the cables’ Pin-1 of 3-XLR connects correct.
Cause 3: 10 Ohm chassis ground resistor is open.
Solution 3: Bridge a 10 Ohm resistor between system ground (G) and earth ground ( ) of
any power supply.
If this condition occurs, it is because the system ground came into contact with
something that was "HOT" with respect to the power supply earth ground. Carefully
check the system ground and AC distribution in the area.
WARNING: THIS IS A POTENTIALLY DANGEROUS SITUATION. A SHOCK HAZARD
MAY EXIST BETWEEN A REMOTE STATION HEADSET AND GROUND.
Problem: Can not turn on the Mic function on all the beltpacks
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
Cause 2: If there is SPK-200 in the system. The Online connector of SPK-200 can connect to
other station’s Intercom Line connector. But Connect To switch of SPK-200 must be place on
Intercom Line position. The setting of Connect To switch is not correct.
Solution 2: Place Connect To switch on Intercom Line position.
9