User's Manual

Hardware Installation Guide Radio Site Planning
02030311-10 Airspan Networks Inc. 5-7
Notes:
1) ASWipLL radios can operate in 2-, 4-, and 8-level FSK with signal strengths
(i.e. receiver sensitivity) greater than -90, -83, and -75 dBm, respectively.
2) As the number of CPEs operating in low modulations (i.e. 2 and 4 FSK)
increases, a decrease in cell bandwidth efficiency is expected. Therefore, to
enable the highest bandwidth efficiency, it's recommended to ensure (e.g. by
RF planning) that all CPEs operate in the highest modulation (i.e. 8 FSK).
3) These link budget rules are theoretical. It represents the maximum
achievable for a system. In reality we have interferences (other WLAN
networks, bluetooth), industrial noise (microwave ovens), atmospheric losses
(air moisture, scattering, refraction), badly pointed antenna, reflexions that will
affect performances. Thus, It is necessary to take a sufficient security margin
on large distances.
4) Normally, a higher margin is desirable due to fluctuation in received power
as a result of signal fading.
5) The maximum transmit power output of ASWipLL radios (regardless of
regulatory domain), depends on the operating frequency:
- 31 dBm: 700 MHz; 1.9 GHz (for BSR)
- 30 dBm: 900 MHz, 925 MHz, 1.5 GHz, 1.9 GHz (for SPR)
- 27 dBm: 2.3, 2.4, 2.5 (MMDS), 2.8, 3.x, and 5.8 GHz
For maximum transmit power according to FCC standards, see Appendix I,
"Declaration of FCC Conformity".