Link planning
2-58
ptp-450 (July 2014)
Calculating Link Loss
The link loss is the total attenuation of the wireless signal between two point-to-multipoint units. The link loss
calculation is presented below:
Link Loss (dB) = Transmit power of the remote wireless unit (dBm) − Tx Cable loss (dB) − Received
power at the local unit (dBm) – Rx cable loss (dB) + Antenna gain at the remote unit (dBi) + Antenna gain at
the local unit (dBi)
Calculating Rx Signal Level
The determinants in Rx signal level are illustrated in Figure 12
Figure 12
Determinants in Rx signal level
Rx signal level is calculated as follows:
Rx signal level dB = Tx power − Tx cable loss + Tx antenna gain
− free space path loss + Rx antenna gain − Rx cable loss
This Rx signal level calculation presumes that a clear line of sight is established between the transmitter and
receiver and that no objects encroach in the Fresnel zone.
Summary of Contents for PTP 450 series
Page 1: ...Cambium PTP 450 User Guide System Release 13 2...
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