broadcast band
Synonyms
Examples
A common example of the D layer in action is the disappearance of distant AM broadcast band stations in the daytime.
A new digital radio technology, Digital Radio Mondiale (DRM), is expected to improve the quality of shortwave audio from very poor to standards comparable to the FM broadcast band.
During the winter months of the Northern or Southern hemispheres, the AM/MW broadcast band tends to be more favorable because of longer hours of darkness.
For example, a typical AM broadcast band receiver covers 510 kHz to 1655 kHz (a roughly 1160 kHz input band) with a 455 kHz IF frequency; an FM broadcast band receiver covers 88 MHz to 108 MHz band with a 10.7 MHz IF frequency.
If the AM broadcast band receiver LO were set at 1200 kHz, it would see stations at both 745 kHz (1200 455 kHz) and 1655 kHz.
In the US AM broadcast bands this occurs at 10 KHz, which is the US channel spacing for the AM broadcast band.