Wireless ISP Equipment Manufacture Demarc Technology Group

Link Budget Calculations
POP SITE					REMOTE SITE
			Frequency	Mhz
Sending Data	Gain dB		Distance	mi	Receiving Data	Gain dB
Radio output power(mW)		mW		km	Received Power		dBm
Radio output power(dBm)		dBm			Antenna		dBm
Pigtail connector		dBm			Connector Loss		dBm
Lightning Arrestor		dBm	Free space loss	dBm	Cable		dBm
Connector Loss		dBm			Connector Loss		dBm
Cable length		dBm	1st Fresnel zone	ft	Lightning Arrestor		dBm
Connector Loss		dBm	2nd Fresnel zone	ft	Pigtail connector		dBm
Input to Antenna		dBm	3rd Fresnel zone	ft	Radio Input Power		dBm
Antenna		dBm	4th Fresnel zone	ft	Min Rx Signal Strength		dBm
EIRP		dBm			Max Rx Signal Strength		dBm
					Desired fade margin		dBm
Receiving Data					Fade margin
Received Power		dBm			At 0dB fading
Antenna		dBm			Margin extra (shortfall)
Connector Loss		dBm
Cable		dBm			Sending Data
Connector Loss		dBm			Radio output power(mW)		mW
Lightning Arrestor		dBm			Radio output power(dBm)		dBm
Pigtail connector		dBm			Pigtail connector		dBm
Radio Input Power		dBm			Lightning Arrestor		dBm
Min Rx Signal Strength		dBm			Connector Loss		dBm
Max Rx Signal Strength		dBm			Cable		dBm
Desired fade margin		dBm			Connector Loss		dBm
Fade margin					Input to Antenna		dBm
At 0dB fading					Antenna		dBm
Margin extra (shortfall)					EIRP		dBm