4
In the circuit below, the antenna picks up many radio frequency signals; AM, FM,
TV, cellular, etc. The oscillator "mixes" with them in a very non-linear circuit (with
the multiplication symbol) and produces many cross products. The tuned circuit
that follows is tuned to the DIFFERENCE between the desired station (frequency)
and the frequency of the oscillator. This difference is called the "Intermediate
Frequency". This is how radios work.
Enter answer
f DESIRED = 577.280 kHz
f OSCILLATOR = 841.280 kHz
f IF = kHz
Antenna
OSC
Solutions:
264.000 kHz