Helios® Dual Band RF Repeater (RFR) is the kind of RF Repeater that can simultaneously work in two wireless systems. It transparently coveys and amplifies the wireless signal of two systems respectively between the BTS (Base Transceiver Station) and mobiles. The Dual Band RFR is working as a relay between the BTS and mobiles. It picks up the signal from the BTS via the Dual Band Donor Antenna, linearly amplifies the signal and then retransmits it via the Dual Band Services Antenna (or the Dual Band Indoor D. A. S) 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 Dual Band RFR are available:
1. Band-Selective Dual Band RF Repeater: To amplify all signals in the whole band (Various bandwidth is available upon request).
2. Channel-Selective Dual Band RF Repeater: To amplify only the signals transmitted in the customized 1, 2, 4, 6, 8 channels (A narrow band with customized central frequency).

Features
1. High working gain as Min. 90dB.
2. Output power +30dBm - +43dBm for large coverage application.
3. Aluminum-alloy casing with IP55 protection and compact design.
4. Integrated smart fan system to improve system heating exchange performance.
5. ALC and AGC to ensure stable operation.
6. Unique max AGC60dB firmware to ensure stable operating on moving platforms such as ship or trains.
7. Easy to install on wall or pole.
8. Adopting filter with highly selectivity and low insertion loss eliminates interference between uplink and downlink.
9.2 RS-232 or RJ45 ports provide links to laptop for local test or to built-in wireless modem for communication with the NMS.
10. Built-in wireless modem (Option) for remote monitoring by SMS, GPRS or TCP/IP.
11. Details repeater parameters and status can be monitoring by built-in web interface, such as RSSI, temperature, output power level, gain, ATT, return loss, VSWR etc.
12. Support upgrading firmware remotely by GPRS.

Technical Specifications
Frequency Range (Customized):
Uplink: 890-915MHz&1710-1785MHz
Downlink: 935-960MHz&1805-1880MHz
Output Power:
Uplink: Min +23dBm - +33dBm
Downlink(Customized): GSM 900MHz: +30-+43dBm DCS 1800MHz: +30-43dBm
Configurable Channels: 1, 2, 4, 6, 8 for option
Working Bandwidth: Various bandwidth is available upon request
Gain: Min. 90dB
AGC Control Range: Min 40dB (+/-2dB)
Gain Control Range: 31dB (1dB Step)
VSWR: < 1.5
Ripple in Band: Max +/- 1.5dB

In-band Inter Modulation Attenuation: Comply to ETSI Requirement
RF Connector: N-type Female
I/O Impedance: 50 ohm
Noise Figure: Max 5dB
Group Time Delay: Max 5µ S
Frequency Error: Max 0.05ppm
Temperature Range: -30 degree Celsius to +55 degree Celsius
Relative Humidity: Max 95%
MTBF: Min. 100000 hrs
Power Supply: DC -48V / AC220V (+/-15%), 50Hz
UPS Backup Power Supply (Optional): 6 hours / 8 hours
NMS Monitor Function: Real-time alarm for Door Status, Temperature, Power Supply, VSWR, Output Power, Gain, Uplink ATT, Downlink ATT and etc.

Remote Control Module (Optional): RS232 or RJ45 + Wireless Modem + Chargeable Li-ion Battery
Approvals and Tests: EN 60950& ETSI 301 489-1 & ETSI 300 609-4
Dimension:  
+37-+43dBm: 774mm x 552mm x 304mm
+30-+33dBm: 605mm x 445mm x 225mm
Weight:  
+37-+43dBm: 55Kgs/87 Kgs (with wooden crate)
+30-+33dBm: 40kgs