- Protected 1+1
If any trouble in one of radio or modem this hop will be protected by other equipment.
i.e. If Radio/ODU 1 faulty so Modem 1 will be down. In this case the traffic capacity will be move to Radio/ODU 2 and Modem 2 automatically.
There are two(2) type for this configuration :

1. Hot Standby.
In this configuration there are only one Antenna, Two(2) Radio/ODU/RAU and
Two(2) Modem Unit for traffic.



2. Space Diversity
In this configuration there are Two (2) Antenna, Two(2) Radio/ODU/RAU and
Two(2) Modem Unit for traffic.



To Pointing or Aligment this configuration, use this rule :
- Step A: Pointing done only between RAU RAU 1A and 1B (RAU RAU 2A & 2B off).
- Step B: Pointing only RAU RAU 2A with 1B (only moving RAU 2A, 1A & RAU RAU 2B off).
- Step C: Pointing only with RAU RAU 2B 1A (only moving RAU 2B, 1B & RAU RAU 2A off).

-> Transmission Component/Element.
Below is the component/Element in transmission :
Outdoor Unit usually abbreviated with ODU and indoor unit with IDU.




- Outdoor Unit: "Sets the radio communication frequency and performances".
Antenna :



RAU/ ODU/Radio:



Medium Capacity: Frequencies between 7 and 38 GHz with C-QPSK and 16QAM
High Capacity: Frequencies between 7 and 38 GHz with 16 QAM and 128 QAM
BAS: Only RAU2. Frequencies are 24, 26, 28 and 31 GHz using C-QPSK

In Transmission RAU/ODU or Radio have sub band pair High and Low like this.



- Radio Cable: "Carries modulated IF, supervision channels and DC power to the radio unit".






- Indoor Unit: MMU/Modem Unit, SMU, AMM, SAU, ETU and etc.
- Sets traffic capacity.
- Traffic and supervision channels termination.