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Hybrid Rf Repeater Rfr Is Designed To Improve Signal Coverage And Telecommunication Quality
Posted at: TradersCity --> Offers to Sell and Export
Posted on: Wed 20 Aug, 2008 3:32 am
RPT873: GSM 900/1800 Hybrid RF Repeater
The GSM 900/1800 Hybrid RF Repeater (RFR) is designed to provide a more cost-effective solution than adding a new Base Transceiver Station (BTS) to improve signal coverage and communication quality in GSM 900MHz and 1800MHz system. And its easy installation and maintenance can help carrier get fast return.
The repeater is working as a relay between the BTS and mobiles. It receives the low-power signal from BTS via the Donor Antenna, linearly amplifies the signal and then retransmits it via the Coverage Antenna to the weak/blind coverage area. And the mobile signal is also amplified and retransmitted to the BTS via the opposite direction.
As per operator’s requirement for working frequency, two types of RFR are available:
Band-Selective RF Repeater: to amplify all signals in the whole band (bandwidth is customized)
Channel-Selective RF Repeater: to amplify only the signals transmitted by the customized 2 channels
Features:
Aluminum-alloy casing with IP65 protection has high resistance to dust, water and corroding
Highly selective channel selector can process 2 channels simultaneously
No interference to BTS by adopting linear amplifier with high gain and low noise
Adopting filter with highly selectivity and low insertion loss eliminates interference between uplink and downlink
RS-232 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
Application:
To expand signal coverage or fill signal blind area where signal is weak or unavailable.
Indoor: Hotels, exhibition centers, basements, shopping malls, offices, parking lots, …
Technical Specification:
Items Band-Selective RF Repeater Channel-Selective RF Repeater
Working Frequency
(customized) Uplink 890~915 / 1710~1717.5 MHz
Downlink 935~960 / 1805~1812.5 MHz
Working Bandwidth 2~25 MHz (Customized) 200 kHz / Channel
Output Power (customized) 2W, 5W >33 dBm (2W) / Channel
(when working at 2 channels)
Gain ≥ 85dB
Gain Adjustment Range 1~31 dB @ step of 1 dB
Voltage Standing Wave Ratio < 1.5
Noise Figure ≤ 6dB
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
In-band Inter-Modulation Attenuation ≤ -40dBc / 30kHz (measured under rated output power)
System Delay ≤ 5.0μSec
I/O Impedance 50Ω
RF Connector N-Type (Female)
AGC / ALC Supported
Temperature Range Operation: -25°C ~ + 55°C / Storage: -30°C ~ +60°C
Relative Humidity Range ≤ 95% (non condensing)
Power Supply (customized) DC +24V / AC 220V±15%, 50Hz
Backup Power Supply (optional) 4 hours
Dimensions 600mm X 420mm X 260mm
Weight 45kg
NMS Monitoring Function Real-time alarm for door status, temperature, power supply, etc.
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