INSTALLATION GUIDE FOR RA-7800
RA-7800 QI
Copyright - refer to title page
Page 13
ENU Status : 1-0-1
1 GENERAL INFORMATION
The RA-7800 Dual-band Optical Repeater (hereinafter called “RA-7800”) is a low cost network
solution which provides flexible and scalable solution of dual band and multi-operator coverage
extension applications, such as citywide enhancement, highway, and scenic spot, etc.
This system consists of Master Unit (MU) RA-7800-D and Remote Unit (RU) RA-7800-R. The MU can
support up to four RUs through optical fibers.
The low signal transmission loss of optical fiber is applicable for long distance transmission. There is
no isolation problem between TX and RX antennas, which means customer can select the antenna
flexibly according to the real situation, such as directional or omni-directional antenna.
Remote configuration and surveillance is possible through Comba’s OMC remote control and
monitoring system.
Characteristics of RA-7800 are as follows:
•
Dual-band configuration supports a single system of two frequency bands, e.g., G
WCDMA2100.
•
With the broadband optical system: 75MHz for GSM1800, 60MHz for WCDMA2100.
•
Master Unit accommodates slide-in modules that allows flexible and scalable system
configuration.
•
High output power with high linearity, which supports multiple carrier operation and ensures the
signal source is of good quality.
•
Optical fiber transmission up to 20km with the maximum optical path loss of 10dB.
•
Li-ion battery keeps the alarm unit running in the event of power failure.
•
Local Operation and Maintenance Terminal (OMT): operating status and parameters can be set
or monitored by OMT PC locally. And the point-to-point setting and inquiry between MU and RU is
realizable through the integrated wireless modem, which makes it convenient for on-site
configuration.
•
Operation Maintenance Center (OMC): systemworking parameters and communication
configuration can be set or inquired remotely through the integrated wireless modem. If alarm is
generated, the equipment will dial up to OMC automatically in the mode of SMS or datalink.
•
The equipment enclosure of RU is designed for all-weather outfoor installation – water-proof,
damp-proof and omni-sealed.
