User's Manual

RS- 5180CDMA800/1900 Dual Band Indoor Fiber Optic
Repeater
Comba Telecom
Edition
2.0
Date
2001-06 7 of 31
2. Technical Explanations
2.1 System Composition
See figure 2.1-1.
Figure 2.1-1 System Composition of RS-5180
Transmission of uplink and downlink signals: RF Master Unit receives the downlink signal from
the BTSs of CDMA800 and CDMA1900. After combines, they are then changed to optical
signals through the optical interface unit and transmitted to the Remote Unit through optical
fiber. After changed to RF signals through Remote Unit, they are finally transmitted to Mobile
handsets by antenna. Vice versa, the uplink signal from user mobile is received by antenna. The
RF signals is then changed to optical signal by Remote Unit and transmitted to the master unit
through optical fiber. The optical signal then is changed to RF signals by the optical interface
unit of the master unit. Finally, after the CDMA800 and CDMA1900 dual band signals are