The discussion revolves around the maximum bandwidth of base-band signals that commercial AM radio channels can carry, considering the separation of channels and regulatory standards. It touches on theoretical aspects of AM transmission and practical limitations imposed by standards.
Participants express differing views on the maximum bandwidth of AM channels, with some supporting the 5 kHz claim and others citing regulatory standards that suggest a higher bandwidth. The discussion remains unresolved regarding the implications of these standards on bandwidth limits.
The discussion includes references to regulatory standards and practices in different regions, which may influence the interpretation of bandwidth limits. There are also potential assumptions regarding the definitions of bandwidth and channel spacing that are not fully explored.
It is half the bandwidth, 5 kHz.tai man said:The commercial AM radio channels are separated by 10 kHz. What is the maximum bandwidth of the base-band signal each of these channels can carry?
Thank you so much!tech99 said:It is half the bandwidth, 5 kHz.
AM transmission requires two sidebands, one each side of the carrier, and each has the same width as the baseband.
There is an interesting discussion on this subject in an ITU Recommendation at the following URL:-AlexCaledin said:"... to fit more transmitters on the MW broadcast band in the United States, maximum transmitted audio bandwidth is limited to 10.2 kHz by a National Radio Systems Committee (NRSC) standard adopted by the FCC in June 1989, resulting in a channel occupied bandwidth of 20.4 kHz."
https://en.wikipedia.org/wiki/AM_broadcasting#Limitations