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Network modems (modulators-demodulators) are devices or programs that allow computers to transmit data over telephone lines. They convert digital computer data to analog sound waves and then demodulate the carrier signals to decode the transmitted information.
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  • Solving Your Radio Frequency Interference Problems (.pdf)
    frequencies and beyond. As more and more diverse uses for the radio spectrum emerge, the number of signals that may potentially cause interference inexorably increases. There are literally millions of radiators in operation at any one time in relatively small geographic areas. For example
  • Magnetron and Microwave Oven Design to Solve Wi-Fi - Interference Issues
    . Radiated noise from microwave ovens may interfere with several communication systems such as Wi-Fi and Bluetooth operating at 2.45GHz as these communication systems occupy the same region of the microwave spectrum (Figure 1). The significant potential for interference from noisy magnetrons forces
  • Spread Spectrum
    the signal on a larger band by multiplexing it with a code (signature) to minimize localized interference and noise.  The system works over a large band. To spread the signal, each bit is modulated by a code.
  • Smart Computing Article - frequency hopping spread spectrum (FHSS) to FTP
    Data sent using FHSS technology hops around from frequency to frequency as it's transmitted from one location to another, reducing the chance for interference. frequency hopping spread spectrum (FHSS) Flexibility and mobility are two reasons for the growing use of wireless LANs (local-area networks
  • ECCOSORB MCS/SS6M Quells Oscillations in Spectrum Analyzer
    A leading manufacturer of Spectrum Analyzers with CATV and QAM / Video demodulation and measurements capabilities turned to Emerson & Cuming Microwave Products to quell an EMI problem in one of their front-end modules. During the initial design RF engineers discovered that interference was being
  • How Does Direct Sequence Spread Spectrum (DSSS) Differ from Frequency Hopping Spread Spectrum (FHSS)?
    operating under FCC spread spectrum ISM band regulations tolerate interference from neighboring radios and interference from sources other than radios, making them less prone to signal loss. Here's why: The radio spectrum is divided into frequency bands, with each band divided into frequency channels
  • Reducing EMI and Improving Signal Integrity Using Spread Spectrum Clocking
    Electromagnetic interference (EMI), once the exclusive concern of equipment designers working with high-speed signals, is no longer limited to a narrow class of high-end applications. The high-speed clocking signals required to drive these ICs, however, generate more EMI and, as a consequence, more
  • IR Remote Control Transmitter
    in the receiver's demodulation module. It. acts to reduce noise by attenuating frequencies outside. of the BPF, such as ambient light and other sources of. interference. For a packaged demodulator, its data. 0.6 ms 0.6 ms. 0.6 ms. 1.2 ms. sheet will specify in some form, the range of frequen-. cies

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