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  2. List of software-defined radios - Wikipedia

    en.wikipedia.org/wiki/List_of_software-defined...

    0/1 - Scalable (multiple receiver can be connected to the same LO) Ethernet or USB usually, but other interfaces are available in MLAB modular system Yes Yes Yes SDR Minor [105] Pre-built 0.1 – 55 MHz ? No 122.880 MSps ADC sampling, 48k-960k output samplrate 1/1 LAN 10/100 Yes Yes No SDR-1 [106] Kit and pre-built 530 kHz – 30 MHz ?

  3. High-Efficiency Advanced Audio Coding - Wikipedia

    en.wikipedia.org/wiki/High-Efficiency_Advanced...

    MPEG-2 and MPEG-4 AAC-LC decoders without SBR support will decode the AAC-LC part of the audio, resulting in audio output with only half the sampling frequency, thereby reducing the audio bandwidth. This usually results in the high-end, or treble , portion of the audio signal missing from the audio product.

  4. Lewis Machine & Tool Company - Wikipedia

    en.wikipedia.org/wiki/Lewis_Machine_&_Tool_Company

    A patented AR-15-pattern is produced with a bolt design featuring a redesigned extractor intended to improve the extraction of cartridges under adverse conditions. The company also produces a redesigned bolt carrier intended to improve the reliable performance of the rifle's “internal piston” system by obtaining a similar timing sequence with 14.5-inch carbine-length barrels compared to 20 ...

  5. Spectral band replication - Wikipedia

    en.wikipedia.org/wiki/Spectral_band_replication

    The SBR idea is based on the principle that the psychoacoustic part of the human brain tends to analyse higher frequencies with less accuracy; thus harmonic phenomena associated with the spectral band replication process needs only be accurate in a perceptual sense and not technically or mathematically exact.

  6. Shooting and bouncing rays - Wikipedia

    en.wikipedia.org/wiki/Shooting_and_bouncing_rays

    The shooting and bouncing rays (SBR) method in computational electromagnetics was first developed for computation of radar cross section (RCS). [1] Since then, the method has been generalized to be used also for installed antenna performance. The SBR method is an approximate method applied to high frequencies.

  7. Laser engraving - Wikipedia

    en.wikipedia.org/wiki/Laser_engraving

    Laser engraving metal plates are manufactured with a finely polished metal, coated with an enamel paint made to be "burned off". At levels of 10 to 30 watts, excellent engravings are made as the enamel is removed quite cleanly. Much laser engraving is sold as exposed brass or silver-coated steel lettering on a black or dark-enamelled background.

  8. Personal radio service - Wikipedia

    en.wikipedia.org/wiki/Personal_radio_service

    The Bangladesh Telecommunications Regulatory Commission (BTRC) allows for use of the 26–27 MHz Citizen's Band (CB) allocation from 26.965 to 27.405 MHz (standard 40-channel allocation used in most of the world for CB). BTRC also permits usage of "Short Business Radio" (SBR) in the 245.000 to 246.000 MHz band.

  9. Engraving - Wikipedia

    en.wikipedia.org/wiki/Engraving

    Other terms often used for printed engravings are copper engraving, copper-plate engraving or line engraving. Steel engraving is the same technique, on steel or steel-faced plates, and was mostly used for banknotes, illustrations for books, magazines and reproductive prints, letterheads and similar uses from about 1790 to the early 20th century, when the technique became less popular, except ...