FCC Part 15

This article describes the regulations from Part 15 of the FCC Code. Note that this information is specific to the 2.4-2.4835 GHz band. While Part 15 covers more than just that band, this article does not. Note some requirements may be different in other bands.

Most of this is from: 15.247

Original File: FCC Part 15 - Radio Frequency Devices

Frequency Hopping

1. Minimum Channel Carrier Separation = 25kHz or (2/3) of the 20dB bandwidth of the hopping channel (whichever is greater, provided output power of < 125mW, if >125mW then remove the 2/3)
2. Systems should use a minimum of 15 channels
3. Each channel should (on average) be used equally (systems may avoid transmitting on a particular frequency as long as 15 channels or more are used)
4. Average time of occupancy on any channel <= 0.4 seconds
5. Minimum 6dB bandwidth = 500 kHz
6. Maximum Power = 1 W (if you have >= 75 non-overlapping hopping channels) or = 0.125 W (otherwise)
7. Directional gain antennas > 6dBi must reduce transmit power (1dB power reduction for every 3 dB of gain above 6dB)
8. In any 100kHz bandwidth outside the operating band, the power should be 20dB below the highest level of transmit power