Samsung Mobile WiMAX Outdoor RAS SPI-2331 System Description page 36

Board Quantity
Name (Sheet)
ULRB
ULPU
Heater
ULPM-
2FE
© SAMSUNG Electronics Co., Ltd.
Mobile WiMAX Outdoor RAS SPI-2331 System Description/Ed.02
1 - Power amplifier function
Amplifies RF signal level to provide the RF output at the antenna port,
which is requested by a service provider
- TDD switch function
- Separates sending signal and receiving signal
- Low Noise Amplifier(LNA) function
Low noise amplification of the received RF signal to amplify the signal to
the signal level at which down converting is possible
- Filter function
Passes the signal within a service provider's bandwidth and rejects other
signals
1 U-RAS Light series-3 Power Unit
Converts DC -48 V input to DC +12 V
1 System heating function for cold start and low temperature operation under
outdoor conditions
1 U-RAS Light series-3 Line Protection Module-2 Fast Ethernet
- Protects external electric interface lines from an electrical overload such
as lightning
- Mounted on the system in case of 10/100Base-Tx backhaul(2 ports)
Function
(Continued)
3-3