TELIKOU
MS-500（4+1Channel）Main Station
6
18) Power LED
This green LED constantly lights on when power supply working properly. If MS-500 meets any
circuit short problem, it will keep on flashing until the problem has been solved.
19) Power
MS-500 receives power when this switch is on. Power LED will light on.
20) Speaker handle
Place this handle at
―ON‖ position, the panel speaker turns on.
21) Sidetone zero-adjusting
The MS-500 uses full-duplex audio 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 earphone. This is called sidetone. Sidetone could cause unwanted feedback, since the
microphone may pick up your returned voice audio and re-amplify it. 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
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 on the Mic switch. Set Mic select switch to panel.
2 Turn the level control to a comfortable level.
3 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.
B) Sidetone Adjustment Procedure for Headset:
1 Turn on the Mic switch. Set Mic select switch to headset.
2 Turn the level control to a comfortable level by having someone talk to you from another
station.
3 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.
C) System Sidetone Adjustment
1 Turn off all the microphones on sub-stations and belt packs.
2 Followed by A) and B), adjust sidetone on MS-800 main station.
