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This system is a digital optic transmission system that can be applied to PCS and W-CDMA systems, which can be used for coverage expansion as well as a solution to shaded areas.
The digital signal processing and transmission methods allow little distortion caused by signal quality of transmission loss, which allows greater long-distance transmission, multiple sector method and selective FA transmission compared to the existing analog forms, that further leads to flexible network design and efficient telephone traffic management.

1) MHU and ROU are digital optically transmitted, which allows the maintenance of S/N
     ratio, providing reliability throughout the transmission areas.
2) Gain is constant regardless of the distance between the MHU and ROU, which
     provides convenience in installation and maintenance and repair.
3) Adjustment for track loss compensation is unnecessary.
4) Long-distance transmission is made possible through effective network formation,
     which provides effective solution for shaded areas.
5) ROU output is 40W (46dBm), which makes is applicable in areas that require a
    cascade.
6) Simple optic cables allow the connection of a maximum of 12 ROU, and divergence
     from the ROU and MHU is possible; furthermore, cost is reduced compared to the
     use of multiple cables.

1) PCS

Items		Performance Requirements	Notes
Frequency Range	Front Direction	1840 ~ 1860 MHz	14FA
Frequency Range	Opposite Direction	1750 ~ 1770 MHz	14FA
Occupied Band Width(OBW)		Less than 1.32MHz/FA	99% Channel Power
Range Evenness		Within 3dB
Frequency Stability		±0.03ppm or less
Input Level	Front Direction	-40 ~ 0dBm
Input Level	Opposite Direction	-120 ~ -65dBm
Output Level	Front Direction	+47 dBm/Total
Output Level	Opposite Direction	-5 dBm/Total
Gain Control Interval	Front Direction	40 ~ 87dB	ATTN Margin- Acquirement of 5dB or greater
Gain Control Interval	Opposite Direction	40 ~ 60dB	ATTN Margin- Acquirement of 5dB or greater
Gain Control Interval		1dB/Step
Gain Control Error		< ±0.7dB	All Sections
Transmission/Reception Segregation Rate		110 dBc or greater
Input/Output Standing Wave Ratio		1.5 : 1 or less
Input/Output Connector Type	MHU	SMA Female
Input/Output Connector Type	ROU	N Female
System Time Delay		5us or less
Impedance Feature		50 ohm
Delay Control	Control Range	Maximum 80 us	ROU
	Control Interval	2us
	Control Error	1us
Switching Time		Feature Check	ROU
Conducted Spurious Emission	Fc ± 885kHz	45 dBc or greater	@ Maximum Output (RBW : 30KHz)
	Fc ± 1.98MHz	55 dBc or greater	@ Maximum Output (RBW : 30KHz)
	Fc ± 2.25MHz	-13 dBm/1MHz or less	@ Maximum Output
	Outside range	-13 dBm/1MHz or less	@ Maximum Output

2) W-CDMA

Items		Performance Requirements	Notes
Frequency Range	Front Direction	2150 ~ 2170 MHz	4FA
Frequency Range	Opposite Direction	1960 ~ 1980 MHz	4FA
Occupied Band Width(OBW)		Less than 5MHz/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		Within 3dB	Peak to Peak
Frequency Stability		± 0.03 ppm or less
Input Level	Front Direction	-30 ~ 0 dBm
Input Level	Opposite Direction	-120 ~ -65 dBm
Output Level	Front Direction	+46 dBm/Total
Output Level	Opposite Direction	-5 dBm/Total
Gain Control Interval	Front Direction	46 ~ 76dB
Gain Control Interval	Opposite Direction	40 ~ 60dB
Gain Control Interval		1dB/Step
Gain Control Error		< ±0.7dB	All Sections
Transmission/Reception Segregation Rate		110 dBc or greater
Input/Output Standing Wave Ratio		1.5 : 1 or less
Input/Output Connector Type	MHU	SMA Female
Input/Output Connector Type	ROU	N Female
System Time Delay		5us or less
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


DBO MHU Front Panel	DBO MHU Right-Side Panel
DBO MHU Left-Side Panel

	DBO ROU Front Panel

DBO ROU Left-Side Panel	DBO ROU Right-Side Panel