Site A and B may be HBS or SU.
B.4 Consideraons for Changing Antenna Parameters
Let:
max Available Tx Power denote the maximum Tx Power praccally available from an ODU. (It appears as Tx
Power per Radio.)
maxRegEIRP denote the maximum EIRP available by regulaon. It will be determined by three factors:
• per band/regulaon
• per channel bandwidth
• antenna gain
maxRegTxPower denote the maximum regulatory Tx Power for the equipment, also having regard the above
three points.
Then, the following relaonship must be sased:
maxAvailableTxPowe r min(maxRegEIRP
– AntennaGain + CableLoss max RegTxPower) ... (*)
The Tx Power (per radio) indicates the power of each radio inside the ODU and is used for Link Budget
Calculaons. The Tx Power (System) shows the total transmission power of the ODU and is used to calculate
the EIRP according to regulaons.
The inequality (*) above is always sased by the system in accordance with the relevant regulaon.
The precise relaonship between the items in inequality (*) is as follows: Required Tx Power (per radio) will
be adjusted down to the lesser of the value entered and maxAvailableTxPower
• Tx Power (system) is maxAvailableTxPower + 3 (for 2 radios)
• Max EIRP is maxRegEIRP.
• EIRP is maxAvailableTx Power + Antenna Gain ‐ Cable Loss