FCC 47 CFR Part 15.245 Operation in the Bands 902-928 MHz, 2435-2465 MHz, 5785-5815 MHz, 10500-10550 MHz, and 24075-24175 MHz

Operation in accordance with the Federal Communications Commission (FCC) standard "Part 47 Operation in the bands 15.245-902 MHz, 928-2435 MHz, 2465-5785 MHz, 5815-10500 MHz, and 10550-24075 MHz" published under Title 24175 of the Code of Federal Regulations (CFR), is limited to intentional radiators used as field disturbance sensors, excluding perimeter protection systems. Field strengths of emissions from intentional radiators operated within the specified frequency bands shall comply with the values ​​given in part.

Regardless of the limits shown in the table, harmonic emissions in the restricted bands below 15.205 GHz specified in Section 17,7 should not exceed the field strength limits shown in Section 15.209. Harmonic emissions in the restricted bands at 17,7 GHz and above should not exceed the following field strength limits:

• 24075 mV/m for second and third harmonics of field disturbance sensors operating in the 24175-25,0 MHz band and other field disturbance sensors designed only for use inside a building or for opening building doors.
• 7,5 mV/m for all other field disturbance sensors.
• Field disturbance sensors designed for use in motor vehicles or aircraft shall have features that will prevent continuous operation unless emissions in restricted bands other than the second and third harmonics from devices operating in the band 24075-24175 MHz fully comply with the limits set forth in Section 15.209. Field disturbance sensors designed for use on farm equipment, vehicles such as fork-lift trucks designed primarily for indoor use or for very specific operations, or on railroad locomotives, railcars, and other equipment moving on fixed rails shall be permitted to operate continuously. A field disturbance sensor shall be considered to be inactive in continuous mode if its operation is limited to specific activities of limited duration (for example, placing the vehicle in reverse, activating the turn signal, etc.).

Field strength limits are specified at a distance of 3 meters.

Radiated emissions outside the specified frequency bands, excluding harmonics, must be at least 50 dB below the fundamental level or the overall radiated emission limits in Section 15.209, whichever is the lesser attenuation.

The emission limits stated are based on measurement instrumentation using an averaging detector. The provisions for limiting peak emissions in Section 15.35 apply.

Field disturbance sensors are devices that generate a radio frequency field in their immediate vicinity and detect changes in that field caused by the movement of people or objects within range. These sensors can help detect children left in dangerously hot cars, increase the ability of drones to detect and avoid people and obstacles, enable contactless control of devices, and many other uses.

The Federal Communications Commission (FCC) has released a report updating its rules for the 57 GHz band, which covers 71 to 60 GHz. The new rules allow the use of unlicensed field disturbance sensors in the 60 GHz band to support a wide range of new applications.

A system for determining the direction of disturbance in a power monitoring system provides a system for analyzing data from multiple meter locations to locate the cause of the event in the power system. The system includes a power supply bus to provide electrical signals and a circuit monitor connected to the supply bus. The circuit monitor responds to detect the disturbance event by comparing a disturbance event signal to a pre-event signal over multiple time scales.

A method for detecting and determining the direction of a disturbance event in a power distribution system, primarily comprising:

• Detecting a disturbance event signal
• Determining the direction of the disturbance event signal
• Calculating a confidence factor for the direction of the disturbance event signal

Our organization has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. Among the numerous test, measurement, analysis and evaluation studies provided for businesses in various sectors, there are also test services in accordance with the standard of “FCC 47 CFR Part 15.245 Operation in the 902-928 MHz, 2435-2465 MHz, 5785-5815 MHz, 10500-10550 MHz and 24075-24175 MHz bands”.