Calculations Page

The calculations page is used to enable easy design of antenna feeds and power conversions. Enter your details and press either the Convert or Calculate button.

MilliWatts to dBm Power Conversion

Operating System Margin

Frequency (MHz):                
Distance between sites (miles): 
Transmit Power (dBm):           
Transmit Cable Loss (dB):       
Transmit Antenna Gain (dB):     
Receive Antenna Gain (dB):      
Receive Cable Loss (dB):        
Receive Sensitivity (dBm):      

Free Space Loss is:    
Received signal is:    

Your Theoretical System Operating Margin is:
 

Please be aware that these figures are based on a clear Fresnel zone (See FAQ for more details). If the Fresnel zone is encroached then the operating margin maybe reduced by as much as 10dB.

Fresnel Zone Clearance

Enter details and press calculate:

Distance (miles):  
Frequency (Mhz):   

The 1st Fresnel Zone is        
80% of the 1st Fresnel Zone is 
60% of the 1st Fresnel Zone is