OptiX RTN 600
Product Description
Commercial in Confidence
Page 18 of 44
4.3.1 Configuration Requirements
Table 4-3
Requirements for 1+1 HSB configuration
Component
Configuration Requirement
IF1A/IF1B
2 PCS
ODU
2 PCS
Antenna
1 PCS (with 1 PCS hybrid coupler)
4.3.2 System Block Diagram
Service
interface
unit
ODU
(main)
RF signal
IF signal
IDU
Cross-connect unit
Service signal
Fan and
power
unit
Clock
unit
Control
unit
Auxiliary
interface
unit
Control and
overhead bus
IF unit
(main)
IF unit
(standby)
ODU
(standby)
IF signal
RF signal
Antenna
Figure 4-3
Block diagram of a 1+1 HSB microwave transmission system
4.3.3 Switching Principle
I. Transmit Direction
The cross-connect unit transmits two service signals to the active and the standby IF
units. Normally, only the active ODU transmits the RF signals to the antenna. If the
active IF unit or the active ODU becomes faulty, the standby ODU takes over and
starts to transmit signals to the antenna.
II. Receive Direction
The antenna transmits two RF signals to the active and the standby ODUs. Normally,
the cross-connect unit selects the service signal coming from the active IF unit. If the
active IF unit or the active ODU becomes faulty, the cross-connect unit selects the
service signal coming from the standby IF unit.
