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This system is a digital optic transmission system applicable to the IMT-2000 system that can be applied to solve a shaded region and coverage expansion. The application of digital signal processing and transmission method provides little deterioration of signal quality caused by transmission loss, and provides greater transmission range and multiple-center method as well as selective FA transmission compared to the existing analog forms, which allows flexible network design and efficient telephone traffic.

1) Reliability among the transmission areas through the maintenance of S/N ratio with
     the digital optic transmission of MHU and ROU
2) Consistent gain independent of the distance between MHU and ROU, which provides
     convenience in installation and repairs.
3) Control for correcting line damage is unnecessary.
4) Formation of an effective network allows long-distance transmission, which provides
    an effective solution for shaded areas.
5) The ROU output is 40W (46dBm), which makes it applicable even in regions that
     require a cascade.
6) The use of a simple optic cable, which allows the connection of a maximum of 12
     ROU. Divergence from ROU and MHU is possible, and cost is reduced compared to
     the use of multiple cables.

1) WCDMA (3G) service
2) Solution of outdoors shaded areas
3) Digital optic transmission system service

Items			Performance Requirements		Notes
Frequency Range	Front Direction		2150 ~ 2170 MHz
	Opposite Direction		1960 ~ 1980 MHz
Occupied Band Width(OBW)			Less than5MHz/FA		99% Channel Power
Main Frequency Used (Front Direction)			1FA : 2152.6 MHz 2FA : 2157.4 MHz 3FA : 2162.4 MHz 4FA : 2167.2 MHz
Main Frequency Used (Opposite Direction)			1FA : 1962.6 MHz 2FA : 1967.4 MHz 3FA : 1972.4 MHz 4FA : 1977.2 MHz
Range Evenness			3dB within		Peak to Peak
Frequency Stability			± 0.03 ppm or less		Test Model 3 32DPCH
Gain Control Interval	Front Direction		40W	46 ~ 76dB
			20W	43 ~ 73dB
			15W	42 ~ 72dB
	Opposite Direction		40 ~ 60dB
Gain Control Interval			1dB/Step or less
Gain Control Error			Step : ±0.7dB		All sections
Input Level	Front Direction		- 30 ~ 0 dBm		4FA standard
	Opposite Direction		- 120 ~ - 65 dBm
Output Level	Front Direction		+46 dBm/Total(40W)		4FA standard
			+43 dBm/Total(20W)
			+42 dBm/Total(15W)
	Opposite Direction		- 5 dBm or greater
Transmission/Reception Segregation Rate			110 dBc or greater
Input/Output Standing Wave Ratio			1.5 : 1 or less
IN/OUT Connector TYPE			MHU : SMA Female ROU : N Female
System Time Delay			5us or less		Excluding Optical Link Delay
Spurious Radioactive Feature (outside the range)	9KHz ~ 800 MHz		-13 dBm or less		RBW 1KHz
	800 ~ 1870 MHz				RBW 10KHz
	2300 ~ 2400 MHz				RBW 100KHz
	1GHz ~12,75GHz				RBW 1MHz
Delay Control	Control Range		Maximum 80us		ROU
	Control Interval		2us
	Control Error		1us
Switching Time			Feature Check		ROU
Front Direction Items
Error Vector Magnitude (EVM)			12.5 % or less		Test Model 1,4 64 DPCH, Test Model 5 30 DPCH
Peak Code Domain Error (PCDE)			- 35 dB or less		Test Model 3 32 DPCH SF = 256시
Output Loading Control Feature	Setting Range		40W	+40 ~ +47dBm	@ 4FA
			20W	+37 ~ +44dBm
			20W	+36 ~ +43dBm
	Setting Error		±1.5 dB
Spurious Radioactive Feature	40W	+/-2.5MHz	- 14 dBm or less		@ Maximum Output RBW 30KHz
		+/-3.5MHz	- 26 dBm or less
		+/-4.0MHz	- 13 dBm or less		@ Maximum Output RBW 1MHz
		+/-8.0MHz	- 16 dBm or less
ACLR	5MHz		45 dBc or greater		@ Maximum Output RBW 30KHz
	10MHz		50 dBc or greater
Interference of Other Firms	@2147.4MHz		-13 dBm or less/ 3.84MHz		@ Maximum Output RBW 30KHz
2ndHarmonicRejection			80 dBc or greater
Monitoring Port (Directional Coupler)			40 dB ±1dB		SMA TYPE
Opposite Direction Items
3rdOrderInterceptPoint(IP3)			+ 20dBm or greater		-65 dBm, 2 CW @ Maximum Gain
System Noise Factor (NF)			5 dB or less		@ Maximum Benefit Optical Loss @ 10dBo (30Km)
Rx0 - Rx1 - Isolation			50 dBc or greater
Output Loading Control Feature	Setting Range		-11 ~ -4dBm		@ 4FA


D-FORCE MHU Right Panel-Top	D-FORCE MHU Front Panel

D-FORCE MHU Right-Back Panel	D-FORCE MHU Back Panel

D-FORCE ROU Front Panel	D-FORCE ROU-Interior