BLE Radio: Physical Layer (PHY)


The PHY transmits or receives bits of data using a 2.4-GHz Radio

  • Uses GFSK modulation in the 2.4-GHz ISM band
  • Operates at 1-Mbps data rate
  • Consists of 40 RF channels with 2-MHz of spacing between channels 37 channels for data, 3 channels for Advertising
  • RF Output Power: -18 dBm to +3 dBm (0.01 mW to 2 mW)
  • BLE Receiver Sensitivity: -89 dBm

Spacing of channels in the BLE PHY allows Advertising in the crowded 2.4-GHz ISM band