Planning; General Information - Siemens SRA 4 User Manual

2

PLANNING

2.1 GENERAL INFORMATION

SRA 4 - 6/7/8/10/11/13 GHz (WB ODU) - UMN
911-381/02C0000 - Issue 3, July 2004
SRA 4 is a Point to Point Broadband Wireless System adopting an Indoor-Outdoor
architecture at 6L GHz, 6U GHz, 7 GHz, 8 GHz, 10 GHz, 11 GHz and 13 GHz with
128 TCM - 4D band with interfaces SONET and SDH worlds fitting recommended radio
channel arrangements listed in par. 2.1.1.
Ease and speed of link set-up, broadband availability and fiber quality, SRA 4 is the most
reliable and convenient solution for a wide range of applications such as:
– SONET/SDH and traditional ATM transport networks;
– LMDS, BWA networks;
– UMTS/GSM cellular infrastructure networks.
The radio system SRA 4 has been designed to transmit the following signals:
– SDH (STM-1)
– SONET (OC-3)
– ATM over SDH
– ATM over SONET
The frame structure of the transmitted signal has the 155.520 Mbit/s bit rate with
128 TCM - 4D modulation.
The SRA 4 is available with two types of ODU:
– WB ODU (Wide Band)
– NB ODU (Narrow Band)
By means of the LCT the WB ODU can be frequency-shifted into a sub-band of the
RF band, while the NB ODU' s are tuned to a specific RF channel and cannot be
frequency shifted by the LCT.
The WB ODU's are described in this manual.
The NB ODU's are described in the SRA 4 manual P/N 911-387/02C0000.
The WB ODU is supplied in two versions :
– ODU AP for AP channelling only
– ODU AP/CC for AP or CC channelling.
2 - PLANNING
2-1