Communications Calculators 
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dB Calculator  
 
Enter the number of watts or dB and the amount of dB to add or subtract. The result will be displayed on the right side of the equation. After entering a value, tab (or click) and the calculation will occur. 
VSWR & Return Loss Calculator  
 
Enter either the VSWR ratio or the Return Loss and the other will be calculated. Through loss is a calculated field only. The calculation will occur when you either tab off the field or click the form. 
Coupler Calculator  
 
Enter either the Coupling Loss or the Through Loss and the other will be calculated. The calculation will occur when you either tab off the field or click the form. 
Clearance Angle Calculator  
Earth Station Centerline Height (h)  
Earth Station Elevation Angle (EL)  
Height of Obstruction (H)  
Distance to Obstruction (D)  
 
Enter all but one field of the top four and either one of the bottom two then press Calculate. 
Carrier to noise vs Eb/No
Set FEC before datarate is set if you want to use datarate instead of symbolrate as input. Threshold Eb/No as specified in ETS 300 421
More calculators on Online Satellite Calculations Script programmed by Jens T. Saetre 031199

Calculators designed by John Overstreet, IDB Systems