recovering the modulating signal from the received signal
The?detection?of?AM?radio signals is a diode application. The modulated?AM?carrier wave is received by the antenna of the radio receiver and is rectified
diodes for rectification and capacitors for storing the peaks
The?detection?of?AM?radio signals is a diode application. The modulated?AM?carrier wave is received by the antenna of the radio receiver and is rectified
10 MHz
Frequencies?below approximately 10?MHz (wavelengths longer than 30 meters), including broadcasts in the?mediumwave?and?shortwave?bands (and to some extent?longwave), propagate most efficiently by skywave at night. Frequencies above 10?MHz (wavelengths shorter than 30 meters) typically propagate most efficiently during the day. Frequencies lower than 3?kHz have a wavelength longer than the distance between the Earth and the ionosphere. The?maximum usable frequency?for skywave propagation is strongly influenced by?sunspot?number.
Space waves
Frequencies in the UHF range normally propagate by means of spacewaves
(i), (ii) and (iii) but not (iv)
digital signals are only of form 0 or 1