Appendix H: Link Budget CalculatorWinLink User and Installation Guide Version 1.750 16-164Description of ParametersThe parameters described in this section are indicated in Figure 16-2.Fade Margin (FM) the margin taken in consideration as part of theparameters needed as spare for high availability. Min level accepted bythe LBC is 6dB.EIRP Tx Power + Antenna Gain (*) – in some products they are limitedto a max value due to local regulation and type approval.Example 110 x Log (Value in mW) = (Value in dBm)1W is the maximum EIRP (Tx Power + Antenna Gain (*)) that isallowed in 5.4 GHz ETSI products by ETSI regulation, (*) consideringcable loss.Note: 3 dB = 2 x Power1W = 1000 mW Æ 10 x Log (1000) = 30 dBm2W = 2000 mW Æ 10 x Log (2000) =33 dBmMax/ Min range (distance) WinLink sensitivity threshold in -60dB range-30 dBm < RSS (sensitivity) <-90 dBm, in addition Propagation Delayis also considered 3.3uS / 1 km (refer to Throughput vs Distanceguideline)Example 2RSS = Tx(power) + Ant(Tx) + Ant(Rx) – lossloss = 32.5 + 20 Log (D) + 20 Log (f);D – Distance in km, f – Center FrequencyClimate/Terrain Factor, see Figure 16-3 and Figure 16-4.Expected FM and RSS, refer to A and BRequired Antenna Height, this is the required antenna heightconsidering the Fresnel Zone. Refer to WinLink site-survey guideline.based on antenna beamConsidering LOS (clearLine of Site)Channel Bandwidth is required with the available Radio Frame Pattern(RFP) for collocated HSS systems.
