A radio receiver is tuned to 560 kHz, and its local oscillator frequency is 1,000 kHz. At the output, an image frequency signal is also received along with the desired signal. What is the frequency of this image channel station?

In amplitude modulation, if a message signal of 5 kHz is modulated by a carrier wave of frequency 900 kHz, then the frequencies of the sidebands are:

According to Nyquist's sampling theorem, a continuous band-limited signal with no frequency components higher than fm Hz can be uniquely reconstructed if it is sampled at uniform intervals spaced at most by: