Which metric is calculated from transmitter power level, cable loss, and antenna gain?

EIRP (Effective Isotropic Radiated Power) is the total power radiated from an antenna in a specific direction, assuming an isotropic radiator. It's calculated by adding the transmitter's output power (in dBm), the antenna gain (in dBi), and subtracting any cable losses (in dB). This metric is crucial for regulatory compliance and determining the actual signal strength reaching a receiver. SNR (Signal-to-Noise Ratio) measures the signal power relative to noise power. RSSI (Received Signal Strength Indicator) is a measurement of the power present in a received radio signal. dBi is a unit of measurement for antenna gain, not a calculated metric of total radiated power.