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Shenzhen Sai Tong Tian Electronic Technology Co., Ltd.

China Manufacturer with main products: Repeaters, Booster, Transmitter

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mobile phone signal booster/repeater/amplifier for GSM900MHz ST-900A

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Export Markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
Place of Origin: Guangdong in China



Mobile signal booster/repeater/amplifier ST-900 introduction:
Cell phone signal amplifier(also named repeater or booster ) is a products designed to solve the mobile phone blind or weak signal. Inside of some tall buildings , the basement of some places such as malls, restaurants, places of entertainment such as karaoke OK sauna and massage,subway stations and many other places where cell phone signals can not reach and can not use the phone. Cell phone signal amplifier can solve these problems.In a particular place as long as installing a  mobile phone signal Repeater , the mobile signal can be well boosted and  the  mobile phone can be well used,
Mobile signal booster/repeater/amplifier ST-900 specification
Working system
Frequency range
Up link:890~915MHz   Downlink: 935~960MHz
Up link:10dB    Downlink: 10 dB
Export power
Up link:50 dBm  Downlink: :50 dBm
Pass band ripple
I/O impedence
50Ω/N connector
Noise figure
Transmission delay
Ambient temperature
Power supply
AC/220V±10%   45~55Hz    DC,12V
To the GB6993-86 standard
Electromagnetic compatibility
To the ETS300 694-4 standard
a)  Power supply LED denote   b)   Export power ELD denote
Coverage area
mobile signal booster/repeater/amplfiier ST-900 application
 Small regions signal blind or weak signal area, such as underground or semi-underground place of business ,basements ,underground parking ,etc.
 small-scale hot-spot signal Complaints areas ,such as conference rooms ,a small supermarket,small shopping malls ,the office and small public areas ,etc.
 Traffic and  large social influence areas ,such as bars ,cafes ,dance halls ,cafes ,fitness clubs ,leisure and entertainment,etc.
 Elevator ,lift wells in particular ,not in the lift cables laid
Home ,office ,luxury yachts ,private cars ,public security system and road safety management ,etc.
mobile signal booster/ Repeater/amplifier ST-900 System Installation
Your system should come with at least the following items:
1) Outdoor Antenna (goes outside the building)
2) Signal repeater
3) Indoor Antenna (goes inside the building)!
4) Coaxial Communication Cables
5) Connetor
Step 1 Start by taking your phone up to the roof or other location outside to find where the signal is strongest.
Step 2  Temporarily mount the Outdoor (outside) antenna in that location. You may need to adjust and move the antenna later. More notes on Donor antennas here.
Step 3  Run coaxial cable into the building to a convenient loaction (attic, etc.) where you can also get standard power for the Signal Repeater.
Step 4  Place the Signal Repeater in that location and connect the coaxial cable to the Outdoor Side of the Signal Repeater and the Outdoor antenna.
Step 5  Mount your Indoor (inside) antenna in a productive location. You may need to adjust or move the antenna later. More notes on Indoor antennas and patterns here.
Step 6  Connect coaxial cable between the Indoor antenna and the Signal Repeater output port.
Step 7   Power up the system and check for signal inside the building. If needed, tune system by moving and or pointing the Outdoor and Indoor antennas until they get the most signal possible.
Step 8  Secure all antennas and cables, securely mount the Signal repeater and clean up the installation.
Of course there are still a few more things to consider but in general, this is the basic procedure. For more information, please contact us.
mobile phone signal booster repeater amplifer GSM ST-900 Packing including;
  1. one piece booster
  2. one piece outdoor antenna
  3. one piece indoor antenna
  4. 60meter cable
  5.  all connector

Service Process

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