single sideband การใช้

• Alternatively, the signals could be separated using a demodulator in single sideband mode.
• Telex systems were adapted to short-wave radio by sending tones over single sideband.
• Typical receiver noise temperatures at 115.3 GHz are 65-70 K single sideband ( SSB ).
• Single sideband transmission is a form of amplitude modulation but in effect filters the result of modulation.
• Pirates operating on shortwave from North America often use single sideband modulation as an alternative to AM.
• Any general communications receiver capable of audio reception at 518 kHz or 490 kHz single sideband can be used.
• During the early 1930s, single sideband ( SSB ) and frequency modulation ( FM ) were invented by amateur radio operators.
• These sub-carriers use special FM-PM-SSBFM ( Frequency Modulation-Phase Modulation-Single Sideband Frequency Modulation ) and have signal frequencies that extend to 45 kHz.
• This can be used to demodulate a type of single sideband signal called " lower sideband " or " inverted sideband ".
• The Audion ( triode ) vacuum tube invented by Lee De Forest in 1906 was the first practical single sideband ( SSB ).
• Output power is limited to 4 watts for AM transmitters and 12 watts peak envelope power for single sideband ( SSB ) transmitters.
• This process also occurs naturally if a radio receiver is tuned to a single sideband transmission but set to decode the wrong sideband.
• ISB is a compromise between double sideband ( DSB ) and single sideband ( SSB ) & mdash; the other is vestigial sideband ( VSB ).
• Suppressed carriers are often used for single sideband ( SSB ) IBAC digital radio ( namely Digital Radio Mondiale ) seems likely to make this irrelevant.
• A variant of MTS used short-wave frequencies, and was known as High Frequency or High Frequency-Single Sideband, so named for using frequencies between 3 and 30 MHz.
• UPS had publicized plans to use the band to develop a narrow-bandwidth wireless voice and data network using a mode called ACSSB ( amplitude-companded single sideband ).
• Several advantages of using digital voice modes are that it uses less bandwidth than older analog voice modes such as amplitude modulation, frequency modulation, and single sideband.
• Jamming can be defeated by using very efficient transmitting antennas, carefully choosing the transmitted frequency, changing transmitted frequency often, using single sideband, and properly aiming the receiving antenna.
• This must be taken into account by the demodulator ( and in the IF filtering ) in the case of certain types of modulation such as single sideband.
• The phasing method for the generation of single sideband signals uses a network which imposes a constant 90?phase shift on audio signals over the audio range of interest.