Meicheng WT-640T User manual

Wireless Tour guide / Translate System
(Build-in lithium battery type)
WT-640 Series
User Manual
▲ WT-640T ▲ WT-640R
Version：10.17.01 http://www.meicheng.com.tw
R

Device introduction 1. On/Off button
2. Contact-Charging points
3. Line in [Only in Transmitter]
4. Mini USB charging port.
5. Microphone [Only in Transmitter]
Earphone [Only in Receiver]
6. Function button【+】
7. Function button【–】
8. Set button【Set】[Only in Transmitter]
SQL button【SQL】[Only in Receiver]
9. Lock button【Lock】
10.LCD display—Display RF signal
status, button lock, battery
status. The number on the [CH]
upper side means channels
number [0~99]; The number on
the [VOL] upper side means
volume [T:1 或2、R:0~15]; In
Receiver, the number on [SQL]
upper side means SQL levels.
11.Back clip.
Operation
1. Switch On/Off：Switch up is on, switch down is off. When switching on, the
device is locked.
2. Unlock/Lock: Keep pushing Lock【Lock】for 3 seconds to unlock/lock.
Device is locked when display showing a Lock picture. Note: If no
operation in 10 seconds after unlocking, the device will turn to
locked mode automatically.
3. Change Channel:
A. Manual adjust—When device is unlocked, push【+】or 【–】
to change channels, the display will show channel number
[0~99]. When the transmitter and receiver are in the same
channel, they will be working.
B. Automatic adjust—Fist turn on the transmitter’s power and
adjust channel well, then keep pressing the【SQL】button on the
Receiver to turn on power, Receiver will scan automatically to the
same channel with Transmitter which already turn on. After
Receiver finished the scanning, and it needs re-lock (please
pressing【Set】button three seconds, total press two times) to lock
the channel(display’s backlight will off), when the transmitter and
receiver are in the same channel, they will be working.
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4. Transmitter VOL: When unlocked, push 【Set】button to change
transmitter volume. Choose 1 for audio line input such as
mp3 player; Choose 2 for microphone input, 2 will transmit a
larger sound.
5. Transmitter Mute: When transmitter is locked, you can press 【Set】for 3
seconds to mute your microphone. The [VOL] on the LCD will
flash when it mutes. Press 【Set】again to switch back.
6. Receiver SQL (Squelch) on/off Adjustment:
To reduce noise at different location, you can adjust receiver
squelch [0~9] off level. When the signal to receiver is too weak
and noise is large, receiver will automatically stop receiving signal
according to this setting. When receiver is on and unlocked, push
【SQL】to adjust squelch function. “0” means receiver keep
receiving signal at any location and the distance is maximal, “9”
means even slight noise will shut off the receiver and has shortest
distance. Usually “0-2” is a good level. If you hear noise from the
receiver when the transmitter signal is off, please increase this
SQL on the receiver.
7. Receiver automatic power off function:
When Receiver did not receive any signal from transmitter around
20 minutes, Receiver will automatic shut down to save the battery
power.
8. Charging: Please use DC5V/800mA charger. When charging, the red light on
the back of the display is on. When charging is finished, the red
light will be off. We supply “drop in” charging station for large
amount of device to be charged at the same time. The charging
time is about 4 hours. PLEASE KEEP COVER OPEN WHEN
CHARGING.
Hints for application:
If two groups are located in a very short distance, nearby channels
might generate interference. In this case, in stead of using two close
channels, for example, CH1 and CH2, please use channels with more
difference, for example, CH1 and CH5, to eliminate the interference
between groups.

Application
How to setup two transmitters (one tour guide+ one attractions narrator)
or ( one lecturer+ one translator ) in one group, application as below:
Remark 1：The Transmitter (Tx) of Guide 1 is for tour guide or lecturer to use.
( Suggestion: Adjust volume level to “2” in this transmitter.)
Remark 2 : Take one Receiver (Rx) of Guide 1 for tour guide or lecturer to use, and
use wishbone shaped audio extender wire to connect respectively with
earphone port and transmitter (Tx) of Guide 2.( Suggestion: Adjust
volume level to “11” in this transmitter.)
Remark 3 : The Transmitter (Tx) of Guide 2 is for attractions narrator or translator
to use. ( Suggestion: Adjust volume level as “1” in this transmitter.)
Remark 4 : People who use the Receiver(Rx) of Guide 2 can hearing two voices (tour
guide+ attractions narrator) or (lecturer+ translator ) at same time.
( Suggestion: Adjust volume level to “11” in this transmitter.)
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Specification :
Model WT-640T WT-640R
Transmit type Digital transmit
Wave band In 500~928MHz range selectable
Default frequency number Around 100(UHF channel ) adjustable
(Around 10-25 frequency could use at same location.)
RF output power 10 dBm --
Sensitivity -115 dBm
Deviation +/-100k
Distance 150 m (Open ground/without interference)
Control
Power switcher on/off,
channel select, volume
setting, button lock,
volume mute.
Power switcher on/off,
channel select, volume
setting, button lock, SQL
function, automatic frequency
corresponding.
S/N ratio >60 dB
Frequency Response 20~16,000 Hz
Input/Output
3.5mm(1/8”) microphone
input *1、3.5mm(1/8”)
audio source input*1,
support audio mixed
3.5mm(1/8”) earphone/
normal audio output
Battery life 17 hours（Average）24 hours（Average）
Battery type DC 3.7V 1200mAh rechargeable build-in lithium battery
Recharge Two charging way: mini USB port or contact point charging. Support charging single devices individually or
charging in the charging storage case.
Dimension 72mm x 52mm x 16mm
Weight 70 g(Including lithium
battery) 65 g (Including lithium battery)

Statement :
* All product and brand names may be trademarks or registered trademarks of the
corresponding manufacturer. TM and R may be omitted in this manual.
The picture and the picture of the product mentioned in this manual may be slightly different,
the effect of the demonstration and schematic diagram for reference only (picture for the
synthesis, schematics), the appearance of the product (including but not limited to color) please
prevail in kind.
MeichengAlways strive to provide the best quality products to customers, so the product software
and hardware will keep upgrading. The information contained in this manual is subject to change
without notice.
Meicheng® MEI CHENGAUDIO VIDEO CO., LTD.
Address: 13F., No.2, Jian 8th Rd., Zhonghe Dist., New Taipei City 235, Taiwan
Tel: [phone], Fax: [phone]
Website : www.meicheng.com.tw Emai l:[email protected]
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