Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I understand SSB is a way to broadcast a signal more efficiently. The signal consists of only one of the sidebands, after having removed the other sideband and the fundamental. What remains is a reduced spectrum of signal for the transmitter to amplify and broadcast. Hence what goes out on the airwaves is a stronger signal.
I could not receive SSB broadcasts until I obtained a higher-priced shortwave radio with a beat-frequency oscillator. It re-injects the carrier frequency so that the incoming SSB signal can merge with it, and become audible.
The BFO needs to produce the proper frequency. It cannot determine what it is by itself. I must tune it by hand. So I rotate the BFO knob, first one way, then the other, and I listen to the voice. As I do so, the incoming sound rises and falls in pitch.
I suspect that it's a challege to make circuitry that extracts a SSB signal. To begin with, it will have trouble locking onto the carrier frequency, since it is absent. If it adds a BFO waveform, then the signal will may or may not adopt a pitch that is predictable. It will be hard to make circuitry that filters it out.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
