User's Manual

Appendix
BreezeNET PRO.11 Series 8-17 User’s Guide
System Characteristics
Receiver Sensitivity
The minimum RF signal power level required at the input of a receiver for
certain performance (e.g. BER).
EIRP (Effective Isotropic Radiated Power)
The antenna transmitted power. Equal to the transmitted output power
minus cable loss plus the transmitting antenna gain.
P
out
Output power of transmitted in dBm
Ct Transmitter cable attenuation in dB
Gt Transmitting antenna gain in dBi
Gr Receiving antenna gain in dBi
L Path loss in dB
Cr Receiver cable attenuation is dB
Pr Received power level at receiver input in dBm
Sr Receiver sensitivity is dBm
Pr = P
out
- Ct + Gt - L + Gr - Cr
EIRP = P
out
- Ct + Gt
Example:
Link Parameters:
Frequency: 2.4 Ghz
P
out
= 17 dBm (50 mW)
Tx and Rx cable length (Ct and Cr) = 50ft. cable type LMR-400 (6.8 dB/100ft)
Tx and Rx antenna gain (Gt and Gr) = 18 dBi
Distance between sites = 5 miles
Receiver sensitivity (Sr) = -74 dBm
Pr >= Sr