Product Info

System Description WipLL Radio Technology - Physical Layer
25030311-08 Airspan Networks Inc. 2-35
2.6.6.2. System Range Considerations
System range depends on the maximum output power of the system. Different
approaches exist, depending on region and frequency band.
2.6.6.2.1. Unlicensed Bands
FCC part 15 (paragraph 247) differentiates between three types of systems:
 Digital modulated
 Frequency hopping
 Hybrid
Limitations on Tx (transmit) power and EIRP differ on this basis. Table 2-14
summarizes the limitations for the different WipLL products.
Table 2-14: Tx power and EIRP limitations for WipLL products
Frequency
band
Mode Tx power EIRP System type
1 Msps 15 dBm 36 dBm Hybrid
900 MHz
1.33 Msps 18 dBm 36 dBm Hybrid
1 Msps -- 36 dBm
Frequency
hopping
2.4 GHz
1.33 Msps -- 27 dBm
Frequency
hopping
1 Msps -- 36 dBm
Frequency
hopping
5.8 GHz
1.33 Msps 18 dBm 36 dBm Hybrid
Note: For WipLL 900, the BSR’s external antenna must have a minimum cable loss
of 2.5 dB to comply with FCC’s EIRP limit of 36 dBm. EIRP is calculated as:
Max. Power Output + Antenna Gain + Cable Loss ≤ 36 dBm (EIRP)