## ERP Calculation Instructions

To calculate ERP, Take the transmitter power output, subtract the losses
from the duplexers, subtract any measurable feedline loss and add the
antenna gain.

Example: (2 dBd combined duplexer and feedline loss) + (5 dBd antenna gain)= 3
dBd gain. **Use antenna gain in dBd not dBi.**

100 watts at transmitter with 3 dbd gain = 200 watts ERP.

Many web sites are available to make this calculation, here is a link to one example:
**ERP Calculator**

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