added EIRP units

content/link_budgets.rst

@@ -160,7 +160,7 @@ Overall it's an easy equation. We add up the gains and losses. Some might not ev
 EIRP
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-As a quick aside, you may see the metric Effective Isotropic Radiated Power (EIRP), which is defined as :math:`P_t + G_t - L_{cable}`.  By summing the transmit power with transmit antenna gain, and subtracting transmit-side cable losses, we get a useful figure that represents the "hypothetical" power that would have to be radiated by an isotropic (perfect omnidirectional) antenna to give the same signal strength **in the direction of the antenna's main beam**.  This last part is emphasized because any antenna with a high gain (:math:`G_t`) only gives that high gain when pointed properly.  So assuming you are pointed well, EIRP gives you everything you need to know about the transmit side of the link budget, and thus it is a metric often found in datasheets of directional transmitters such as satellite ground stations (usually in the form of "max EIRP").
+As a quick aside, you may see the metric Effective Isotropic Radiated Power (EIRP), which is defined as :math:`P_t + G_t - L_{cable}` and in units of dBW.  By summing the transmit power with transmit antenna gain, and subtracting transmit-side cable losses, we get a useful figure that represents the "hypothetical" power that would have to be radiated by an isotropic (perfect omnidirectional) antenna to give the same signal strength **in the direction of the antenna's main beam**.  This last part is emphasized because any antenna with a high gain (:math:`G_t`) only gives that high gain when pointed properly.  So assuming you are pointed well, EIRP gives you everything you need to know about the transmit side of the link budget, and thus it is a metric often found in datasheets of directional transmitters such as satellite ground stations (usually in the form of "max EIRP").
 
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 Noise Power Budget