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DSB-SC is basically an amplitude modulation wave without the carrier, therefore reducing power waste, giving it a 50% efficiency. This is an increase compared to normal AM transmission (DSB) that has a maximum efficiency of 33.333%, since 2/3 of the power is in the carrier which conveys no useful information and both sidebands containing identical copies of the same information.
In the Armstrong method, the audio signal and the radio frequency carrier signal are applied to the balanced modulator to generate a double sideband suppressed carrier signal. The phase of this output signal is then shifted 90 degrees with respect to the original carrier. The balanced modulator output can either lead or lag the carrier's phase.
The term DSB reduced-carrier normally implies enough carrier remains in the transmission to enable a receiver circuit to regenerate a strong carrier or at least synchronise a phase-locked loop but there are forms where the carrier is removed completely, producing double sideband with suppressed carrier (DSB-SC). Suppressed carrier systems ...
A federal appeals court blocked Nasdaq rules to increase boardroom diversity, saying that the Securities and Exchange Commission did not have the authority to approve them.. Wednesday’s ruling ...
The carbs tend to be reasonable at around one serving of carbs (or around 15 grams), making it work into a balanced blood sugar meal plan,” says Toby Amidor, M.S., RD, author of Health Shots ...
Kristen, Mya's mom, shared a video on Friday, December 6th of the bird “flying”. Mya can’t fly the way birds normally fly because of her missing wing and toes, so her mom helps her.
Amateur radio operator's "Radio shack" with vintage gearVintage amateur radio is a subset of amateur radio hobby where enthusiasts collect, restore, preserve, build, and operate amateur radio equipment from bygone years, such as those using vacuum tube technology.
I wonder if there should be a reference to modulation methods derived from AM. Specifically, DSB-SC and QAM. There is a {} related to its use in computer modems. QAM is widely used in computer modems, and DSB-SC for the stereo subcarrier for FM transmission. Both are modifications to AM.