User's Manual

Uniwave

User Manual

7.5.3 UniTransport

Cascading two Primary Hubs in a UniTransport system makes little difference to the foregoing

discussion. The overall gain between a Service Module in the UniTransport Hub and a Remote Unit in

the downstream Primary Hub is configured to have the same gain as if the Service Module had been

plugged directly into the downstream Primary Hub. The internal setup of the system optimizes the levels

to minimize overall distortion and noise, typically to within 1 dB of what would be achieved with the

downstream Hub and its components alone.

The main contributor to Uplink noise is the number of Remote Units that are being aggregated together.

Each one adds some noise, but only one has the signal to be received by the BTS. The values in the

Noise Figure table and formula above are valid for up to 64 Remote Units connected indirectly to a

UniTransport Hub. If the number of connected RUs were to be doubled from 64 to 128, expect the noise

power at the BTS to increase by 3dB. As before, the POI UL attenuation would need to be adjusted to

achieve a compliant uplink noise power at the BTS.