Perancangan encoder untuk pemancar stereo dengan teknologi frequency modulation
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Institusion
Institut Teknologi Telkom Purwokerto
Author
Ahmad, Khudlori
Subject
T Technology (General)
Datestamp
2021-04-22 02:00:18
Abstract :
Stereo encoder is the simplest solution to build transmission of FM. FM transmissions can be exemplified unidirectional communication like FM radio transmitters. FM radio transmitter are used for communication and information tool. Results are expected to stereo FM radio transmitter. Stereo discharing is obtained by minimizing the unwanted signal (noise) and get the sub-carrier signal from R and L channels are stable. Sub-carrier signal is 38.46 kHz difference signal which contains the information. signal 38.46 Khz generated from monolithic IC BA1404. Communication system transmission FM radio transmitter is controlled to get the equalization, continuity of and reference objectives by a pilot signal 19.01 Khz. Pilot signal in the stereo FM transmission derived from 38 KHz crystal divided half by IC BA1404 with the same phase. FM radio transmitter the MPX signal from sub- carrier signals mixed signal pilot. Mixer circuit generates signal multiplexer (MPX) signal comprising 40 Khz Mono (L+R) 15 KHz , 19 KHz pilot signal and the signal DSBSC (L-R) 36.92 ~ 40 KHz. Double side band signal is suppressed carrier (DSBSC) has bandwidth at small levels , that gain the signal needs to be plann. Gain is used by 10 dB produces 50.60 KHz MPX output signal consisting of mono signal 15 KHz , 19.01 KHz pilot signal and the signal DSB SC 26.32~50.60 KHz . Where , DSBSC signal suppressed by the signal sideband 38.46-12.14 KHz~38.46+12.14 KHz. Gain signal generate stable signal with low noise, making for an FM radio transmitter technology is pretty good. Keywords: Modulation, Stereo Pre-emphasis, Encoder, and Mixer
Stereo encoder is the simplest solution to build transmission of FM. FM transmissions can be exemplified unidirectional communication like FM radio transmitters. FM radio transmitter are used for communication and information tool. Results are expected to stereo FM radio transmitter. Stereo discharing is obtained by minimizing the unwanted signal (noise) and get the sub-carrier signal from R and L channels are stable. Sub-carrier signal is 38.46 kHz difference signal which contains the information. signal 38.46 Khz generated from monolithic IC BA1404. Communication system transmission FM radio transmitter is controlled to get the equalization, continuity of and reference objectives by a pilot signal 19.01 Khz. Pilot signal in the stereo FM transmission derived from 38 KHz crystal divided half by IC BA1404 with the same phase. FM radio transmitter the MPX signal from sub- carrier signals mixed signal pilot. Mixer circuit generates signal multiplexer (MPX) signal comprising 40 Khz Mono (L+R) 15 KHz , 19 KHz pilot signal and the signal DSBSC (L-R) 36.92 ~ 40 KHz. Double side band signal is suppressed carrier (DSBSC) has bandwidth at small levels , that gain the signal needs to be plann. Gain is used by 10 dB produces 50.60 KHz MPX output signal consisting of mono signal 15 KHz , 19.01 KHz pilot signal and the signal DSB SC 26.32~50.60 KHz . Where , DSBSC signal suppressed by the signal sideband 38.46-12.14 KHz~38.46+12.14 KHz. Gain signal generate stable signal with low noise, making for an FM radio transmitter technology is pretty good. Keywords: Modulation, Stereo Pre-emphasis, Encoder, and Mixer
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