Single Sideband Techniques

Single Sideband Techniques:

Define Suppression of Carrier : Three main systems are employed for the generation of SSB; the filter method, the phase cancellation method and the “third method.” They differ from one another in the way of suppressing the unwanted sideband, but all use some form of balanced modulator to the Define Suppression of Carrier. The balanced modulator is the key circuit in single-sideband generation. The next section will illustrate the proof of its operation. Effect of Nonlinear Resistance on Added Signals: The relationship between voltage and current in a linear resistance is given by where b is same constant of proportionality. If Equation (4-1) refers to …


Extensions of Single Sideband Amplitude Modulation : The Extensions of Single Sideband Amplitude Modulation is namely, Forms of Amplitude Modulation: This section on amplitude modulation defines, describes and lists the main applications of the various forms of AM used for telephony and TV, particularly the various forms of Single Sideband Amplitude Modulation. The International Telecommunications Union (I.T.U.) Radio Regulations also define and describe all forms of emission, however modulated. A3E (previously A3) Double sideband, full carrier. As already discussed, this is “standard” AM, used for broadcasting and by now for very little else. R3E (previously A3A) Single-sideband, reduced carrier. This is a pilot carrier sys­tem. An attenuated …


Methods of Suppressing Unwanted Sidebands : As stated earlier, the three practical methods of SSB generation all use the balanced modulator to suppress the carrier, but each uses a different method of removing the unwanted sideband. All three systems will remove either the upper or the lower sideband with equal ease, depending on the specific circuit arrangement. Each of the systems will now be studied in turn in the Methods of Suppressing Unwanted Sidebands. The Filter System: The filter system is the simplest system of the three after the balanced modulator the unwanted sideband is removed (actually heavily attenuated) by a filter. The filter may …


Single Sideband : A brief, if not oversimplified, explanation of Single Sideband will help in understanding the transmission process. To begin, we must review some basic transmission processes. The physical length of the antenna must equal the wavelength of the transmitted signal, usually in the RF range. The audio signal is much too long to be transmitted directly by a conventional The intelligence (audio) must be processed by the electronic circuitry to meet the transmission requirements of the system. This process is known as mixing. The Single Sideband system incorporates the mixing process plus a signal-multiplying filtering enhancement, to ensure that the signal meets the requirements …


Updated: May 1, 2020 — 10:19 pm