2W TETRA 400mhz band selective repeater
Kingtone Repeaters
Kingtone system is designed to solve problems of weak mobile signal, which is much cheaper than adding a new Base Station (BTS). Main operation of RF Repeaters system is to receive low‐power signal from BTS via radio frequency transmission and then transmit the amplified signal to the areas where network coverage is inadequate. And the mobile signal is also amplified and transmitted to the BTS via the opposite direction.

Telephone repeater
This is used to increase the range of telephone signals in a telephone line. They are most frequently used in trunklines that carry long distance calls. In an analog telephone line consisting of a pair of wires, it consists of an amplifier circuit made of transistors which use power from a DC current source to increase the power of the alternating current audio signal on the line. Since the telephone is a duplex (bidirectional) communication system, the wire pair carries two audio signals, one going in each direction. So telephone repeaters have to be bilateral, amplifying the signal in both directions without causing feedback, which complicates their design considerably. Telephone repeaters were the first type of repeater and were some of the first applications of amplification. The development of telephone repeaters between 1900 and 1915 made long distance phone service possible. However most telecommunications cables are now fiber optic cables which use optical repeaters (below).

Cellular repeater
This is a radio repeater for boosting cell phone reception in a limited area. The device functions like a small cellular base station, with a directional antenna to receive the signal from the nearest cell tower, an amplifier, and a local antenna to rebroadcast the signal to nearby cell phones. It is often used in downtown office buildings.                                                                                                                                                                                                                                                    
 

Main Features
◇ High linearity PA; High system gain
◇ Intelligent ALC technology
◇ Full duplex and high isolation
◇ Sharp filter curve
◇ Automatic Operation convenient operation
◇ Modular design ease to maintain
◇ Remote control/monitor/alarm via RF MODEM or Ethernet
◇ IP65 chassis design for both indoor and outdoor application

Items			TETRA450 band selective repeater
Frequency Range （customized）		Uplink	450-455MHz
		Downlink	450-455MHz
Output Power		Uplink	Min +23dBm -+33dBm
		Downlink	Min. +30dBm - +43dBm
Working Bandwidth			Various bandwidth is available upon request
Gain			Min. 90dB
AGC Control Range			Min 30dB (+/-2dB)
Gain Control Range			31dB (1dB Step)
VSWR			< 1.5
Ripple in Band			Max +/- 1.5dB
Inter modulation attenuation			≤-45dBc ♦; ≤-36dBc ♦
Spurious Emissions	9KHz-1GHz		Max -36dBm
	1GHz-12.75GHz		Max-30dBm
RF Connector			N-type Female
I/O Impedance			50 ohm
Noise Figure			Max 5dB
Group Time Delay			Max 5µS
Temperature Range			-25 degree Celsius to +55 degree Celsius
Relative Humidity			Max 95%
MTBF			Min. 100,000 hrs
Power Supply			DC -48V / AC220V (50Hz)/AC110V(60Hz)(+/-15%)
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 + Wireless Modem + Chargeable Li-ion Battery