Single Antennas at Both Sites
Chapter 4
1HW6WUHDP[8VHU0D
nual
Version 2.1
4-20
For example with a dual antenna
1HW6WUHDP
can transmit at modulation
of 64QAM and FEC of 0.83 and get an air rate of 130 Mbps, compared to 65
Mbps with single antenna.
To work in this mode, each antenna port must be connected to an antenna,
the RSS level in both receivers should be balanced and a minimal separation
between the antennas must be maintained. (For example, by using dual
polarization antennas a cross polarization separation is attained).
Upon selecting Antenna Type as Dual,
1HW6WUHDP
automatically doubles
the air rates.
Link Manager indicates a case of unbalanced RSS between the two anten-
nas.
Single Antennas at Both Sites
By selecting a single antenna at both sites the ODUs operate with a single
radio that is connected to the ANT 1 connector. The second radio is auto-
matically shut down.
Single and Dual Antennas
In this mode one of the sites uses the ODU with a single antenna while the
other site uses the ODU with a dual antenna.
The advantages in this mode in comparison to using a single antenna in
both sites are doubled total Tx power and additional polarization and/or
space diversity.
1HW6WUHDP
automatically switches to this mode if one of the ODUs is con-
nected to a dual antenna or if the RSS at one of the ODU receivers is below
minimal level.
The air rates used in this mode are same as when using single antennas in
both sites.