User's Manual

5.8GHz PDH User’s Manual
3
2.3 Composition and Principle
2.3.1 System Composition
PDH system is composed of ODU and IDU. Other set of equipments include antenna
system, end- terminals etc.
ODU unit is the Rx/Tx unit of microwave signal. It is composed of other microwave units
(amplifier, converter, coded integrator etc.), duplexer, IF unit (dual converter, local
oscillator, IF processing segment etc.), monitor unit, remote unit, and power board.
IDU unit mainly comprises of QPSK modulator, de/multiplexer, monitor unit, network
management system, digital service, power system, other interfaces etc.
Antenna systems include antenna, matching connection, transformation and other
installation assembly for fixing on the rooftop.
ODU unit and IDU unit are connected by an IF cable.
PDH System Block Diagram (1+ 0 mode)
MODEM
Monitor
Unit
MUX Service
Power
PC NMS
network
management
system
Phone
ODU
Antenna
N*2Mb/s