WB-DSSS uses a well-known method to obtain sensitivity gains by means of coding and spreading the information bits into a series of transmitted symbols.

The transmit spectrum requirements of FCC Section 15.247 for digital transmission systems operating in the 902 MHz - 928 MHz band are as follows:

• The minimum 6 dB emission bandwidth of the signal shall be at least 500 kHz.
• The maximum peak conducted output power for transmitter is +30 dBm (1 Watt).
• The maximum power spectral density is limited to 8 dBm in any 3 kHz band segment within the emission bandwidth during any interval of continuous transmission.