What is an FCC Part 15 AM station?
“Part 15” refers to the part of the US broadcast regulations that cover unintended transmissions and radio frequency interference. Essentially, this means tiny radio signals whose transmission can’t be avoided or are negligible.
How far will a 15w FM transmitter broadcast?
At 15 watts, the range increases to 5 miles, at 40 watts to 10 miles and at 100 watts to 15 miles. The general rule of thumb is it will take four times the power to double the transmission distance. Increase the transmission range of the FM antenna without increasing the power by raising the antenna.
How does an AM transmitter work?
The working of AM transmitter can be explained as follows.
- The audio signal from the output of the microphone is sent to the pre-amplifier, which boosts the level of the modulating signal.
- The RF oscillator generates the carrier signal.
- Both the modulating and the carrier signal is sent to AM modulator.
HOW FAR CAN AM signals travel?
Useful daytime AM service is generally limited to a radius of no more than about 100 miles (162 km), even for the most powerful stations. However, during nighttime hours the AM signals can travel over hundreds of miles by reflection from the ionosphere, a phenomenon called “skywave” propagation.
How long is an AM wave?
Footnote 1: The wavelengths of AM radio signals vary from a maximum of 555 meters (1821 feet) at 540 kilohertz (kHz), the lowest AM carrier frequency used in the United States for broadcast stations, to a minimum of 176 meters (579 feet) at 1700 kHz, the highest carrier frequency at the upper end of the AM expanded …
What is the range of commercial AM broadcast bands?
FM radio stations are usually assigned a frequency in the range of 88 to 108 MHz in contrast to AM radio which is in the range of 0.55 to 1.6 MHz, and this is one reason why AM radio has a longer range; however, FM radio operates better in reception areas that are closed in, such as tunnels and buildings, owing to the …
What frequencies belong to the AM band?
The AM band in the United States covers frequencies from 540 kHz up to 1700 kHz, in 10 kHz steps (540, 550, 560 1680, 1690, 1700). 530 kHz in the United States is not available for broadcast use, but is reserved for the use of very low powered Travelers’ Information Stations.
Are there any transmitter that exceed part 15 power?
Here you’ll find links to various transmitter manufacturers and retailers offering transmitting equipment. Care should be exercised with any transmitter that exceeds Part 15 power limits, such as in the case of carrier current applications.
Can a part 15 transmitter cause harmful interference?
ADVISORY: While kit transmitters may offer a reduced cost it’s important to remember that if your kit should cause harmful interference or exceed Part 15 emissions limits you may be subject to complaints, fines and/or a visit from an FCC field agent. Care should be exercised with any kit built transmitter.
Do you need FCC ID number for Part 15 FM transmitter?
All pre-assembled Part 15 FM transmitters sold in the United States must be certified and have their FCC ID number prominently affixed and visible on the transmitter.
Is the Taw Global FM transmitter part 15 compliant?
To date we have been unable to confirm that the Drive-By Broadcaster and Radio House Tour FM Transmitters also marketed by TAW Global are compliant with FCC Part 15 regulation applicable to these devices.
