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In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation used to transmit information, such as an audio signal, by radio waves. A refinement of amplitude modulation, it uses transmitter power and bandwidth more efficiently.
Services Selection Board (SSB) is an organization that assesses the candidates for becoming officers in the Indian Armed Forces. The board evaluates the suitability of the candidate for becoming an officer using a standardized protocol of evaluation system which constitutes intelligence tests, and personality interviews.
Sashastra Seema Bal (SSB; transl. Armed Border Force) is a central armed police force in India under the Ministry of Home Affairs. It is responsible for guarding India’s borders with Nepal and Bhutan .
Fldigi (short for Fast light digital) [4] is a free and open-source program which allows an ordinary computer's sound card to be used as a simple two-way data modem.The software is mostly used by amateur radio operators who connect the microphone and headphone connections of an amateur radio SSB or FM transceiver to the computer's headphone and microphone connections, respectively.
Only unmarried graduates are eligible to sit for the exam. Examination is conducted twice a year. Successful candidates are admitted into the respective Academies after an interview conducted by the Services Selection Board (SSB). Officer jobs are available in the Indian Army, Navy, and Air Force after passing the Combined Defence Services Exam ...
American Novice and Technician class licensees were granted CW and SSB segments on the 10 meter band as of 21 March 1987. [ 4 ] With the elimination of Morse code testing requirements for U.S. amateurs in February 2007, Technician-class licensees who have not passed a code test may operate with up to 200 Watts PEP using CW and SSB modes in a ...
The roofing filter is usually found after the first receiver mixer (which normally contains an amplifier) to limit the first intermediate frequency (IF) stage's passband.It prevents overloading later amplifier stages, which would cause nonlinearity ("distortion") or clipping ("buzz") even if the overload occurred on frequencies whose signal is not heard directly.
QSK operation is a technical challenge: It requires very fast T/R RF switches at the high power and voltage side of the radio transceiver. Such switches must be controlled automatically by the telegraph key, and as such they must be rapid enough to be perceptually undetectable by the telegraph operator.