GSM 850MHz Fiber Optic Repeater

• Customization: Available
• Type: Wireless Repeater
• Transmission Medium: Optical Fiber
• Model NO.: BT-GC00D-4/BT-GB43D-4
• Standard: Standard
• Lightning Protection: Lightning Arrester
• Certification: ISO, CE
• Condition: New
• Transport Package: Wooden Case
• Specification: 560*450*270mm
• Trademark: BOOSTEL
• Origin: China
• Production Capacity: 2000 Set/Year

Product Description

 

Specifications of GSM850 Fiber Optic Repeater
Model: BT-GC00D-4 BT-GB43D-4

The Fiber Optic Repeater (FOR) is designed to solve problems of weak mobile signal in the place that is far away from the Base Transceiver Station (BTS) and has fiber optic cable network underground.
The system consists of two parts: Donor Unit and Remote Unit. The Donor unit captures the BTS signal via direct coupler closed to BTS, then converts it into optic signal and transmits the amplified signal to the Remote Unit via fiber optic cable. The Remote unit will reconvert the optic signal into RF signal and provide the signal to the areas where network coverage is inadequate. And the mobile signal is also amplified and retransmitted to the BTS via the opposite direction.

 

Features

  
 

Aluminum-alloy casing with IP65 protection has high resistance to dust, water and corroding
Omni-directional antenna can be adopted to expand more coverage
Tx/Rx control and alarm messages can be transmitted via one fiber optic cable
Adopting WDM module to realize long-distance transmissionStable and improved signal transmission quality
One Donor Unit can support up to 4 Remote Units to maximize utilization of fiber optic cable
USB port provides a link to a notebook for local supervision or to the built-in wireless modem to communicate with the NMS (Network Management System) that can remotely supervise repeater's working status and download operational parameters to the repeater

Applications

 
 

To expand signal coverage or fill signal blind area where signal is weak or unavailable.

Outdoor:	Airports, tourism regions, golf courses, tunnels, factories, mining districts, villages, …
Indoor:	Hotels, exhibition centers, basements, shopping malls, offices, parking lots, …

 

Application Diagram

 
 
 
 

Technical Specifications

  
 

Item			Specifications
Working Frequency (DL Selective)		Uplink	824-849 MHz
		Downlink	869-896 MHz
Maximum Input Power			10 dBm
Transmission Distance			≤ 20km
Maximum Output Power(Customized)			43dBm
Maximum Gain(Cable access)			≥ 60dB
Gain Adjustment Range			1~31 dB @ step of 1 dB
Voltage Standing Wave Ratio			< 1.5
Noise Figure			≤ 5dB(only for uplink)
In-band Ripple			≤ 3dB
Spurious Emission	Within working band		≤ -15dBm/30kHz
	Out of working band (f > 2.5MHz)		9kHz~1GHz: ≤ -36dBm/30kHz
			1GHz~12.75GHz: ≤ -30dBm/30kHz
Third-order Inter-Modulation			≤ -45dBc / 30kHz (measured under rated output power)
System Delay			≤ 5μSec
I/O Impedance			50Ω
RF Connector			N-Type (Female) / Changeable / bottom of casing
Fiber Optic Light Source			Laser unit (wavelength:1310nm/1550nm)
Optical Output Power			≥0dBm(1310nm) / ≥3dBm(1550nm)
Optical Receiver Sensitivity			≤-25dBm
Temperature Range			Operation: -25°C ~ + 55°C / Storage: -30°C ~ +60°C
Relative Humidity Range			≤ 95% (non condensing)
Power Supply (customized)			DC-48V or AC110V or AC220V,50/60Hz
Power consumption			≤ 15W(Donor Unit)	≤ 150W(Remote Unit)
Backup Power Supply (optional)			4 hours
Casing Level			IP32	IP65
Dimensions			418mm X 90mm X 290mm	428mm X 328mm X 220mm
Weight			6kg	35kg
NMS Monitoring Function (optional)			Real-time alarm for door status, temperature, power supply, LNA, VSWR, self-oscillation, etc; Remote control  turn on/off, increasing/decreasing output power, etc; Real-time status for output/input power, UL/DL gain, all status of repeater's.

Installation & Commissioning

1.1 Installation

1.1.1 Steps for mounting on the 19" Standard Cabinet

Master Unit

 

1. Find a place with 2U height inside the 19" standard cabinet near the BTS.
2. Insert the FOR Donor Unit into the cabinet.
3. Fasten the Donor Unit onto the cabinet via four screws.
4. Connect two couplers to the BTS terminals of the selected sector (the sector antenna shall be facing against the area to be covered) as shown in Figure 4-4.
5. Connect a RF Combiner between the coupler and Donor Unit with 3 RF Jumper Cables (see Figure 4-3) as shown in Figure 4-4. Each of the RF Jumper Cables has N-Male connectors at two ends.
6. Connect one optic patch cord (see Figure 4-6) between the fiber optic terminal and the Donor Unit. And cover the other patch cords with a plastic bag for protection.
7. Connect the power cable between the BTS -48V power supply and the Donor Unit.

Remote Unit

1.2.1 Steps for mounting on the Pole

 

1. At Donor site, install the FSR Donor Unit, Donor Antenna, Link Antenna, and RF cable as per specified plan and site layout. FSR Donor Unit can be pole-mounted using the brackets as shown below.
2. Place M8 screws through the holes of H type brackets as shown in figure 1
3. Fix combiner onto the H type brackets with M6 screws
4. Fix H type brackets with combiner installed onto the pole with U type brackets and M8 screws

 
 
Figure 1 Repeater Mounting Bracket
 

1. Orient the Link Antenna of Donor Site to the direction of the Remote Site.
2. Use Site Master to measure the VSWR of the RF cable from the Link Antenna. The value should be less than 1.5; Otherwise, check the connectors and the installation of the cable.
3. Start Commissioning the Donor Unit .
4. Proceed to the Remote Site.
5. At Remote site, install the FSR Remote Unit, Link Antenna, Coverage Antenna, and RF cables. Remote Unit can be wall mounted or pole mounted depending on the approved plan.
6. Orient the Remote Link Antenna to the direction of the Donor Site.
7. Using Spectrum Analyzer, check the Link RSL; adjust the Link Antennas of both Donor and Remote until the required RSL is achieved. Link RSL can be computed using conventional path calculation method.
8. Then, measure the VSWR of the RF cables connecting with the Link Antenna of Remote Unit. The value should be less than 1.5, otherwise, check the connectors and the installation of the cable.
9. Start Commissioning the Remote Unit .

1.1.2 Steps for mounting on the wall

 

1. At Donor site, install the FSR Donor Unit, Donor Antenna, Link Antenna, and RF cable as per specified plan and site layout. FSR Donor Unit can be wall-mounted using the brackets as shown below.
2. Make four marks on the wall according to the dimension shown as figure 2
3. Drill four holes at position marked
4. Fix two pcs H type brackets on the wall with M8 expansion screws
5. Fix combiner onto the brackets with M6 screws

 


Figure 2 Repeater Mounting Bracket

     6. The following steps are the same with step 4 to 12 for mounting on the Pole.

 

 1.3 Commissioning

1. Connect the RF cable from Donor Antenna to the spectrum analyzer and check if the Donor Antenna is receiving the correct frequency; and then measure the signal level of the said frequency (RSL). Adjust the antenna to make the readings approach the recorded value on the survey report. Record all readings.
2. Inside the repeater, disconnect the uplink duplexer to the ICS module so as to cut any signal coming from air going to the uplink duplexer and thus protecting the amplifier from damaging. Connect a 30 dB attenuator to the output of the repeater; this attenuator will serve as a load for the repeater. The purpose of this attenuator is to protect the equipments from damaging.
3. Turn ON the repeater. Observe the LED display on the NMS board. Check for any alarm. Under normal condition, the POWER LED should be always green and the RUN LED should be blinking, the ALARM LED should be not bright with red color.

 

Connect your laptop to the repeater via the data cable.