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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
  • rfRXD0420 Receiver Module
    The rfRXD0420 Receiver Module (see Figure 1) is a low cost, high performance UHF short-range radio ASK receiver design using the Microchip Technology The module design is suitable for: ? Wireless remote command and control ? Remote Keyless Entry (RKE) ? Security systems ? Low power telemetry
  • rfRXD0420 ASK Receiver Reference Design
    This application note describes a low cost, high performance UHF short-range radio ASK receiver design using the Microchip Technology rfRXD0420. The reference design is suitable for: * Wireless remote command and control * Remote Keyless Entry (RKE) * Security systems * Low power telemetry
  • Frequency Modulation (FM) Tutorial
    Edwin H. Armstrong, known as one of the founding fathers of radio technology, invented the superheterodyne radio receiver in 1918 and frequency modulation (FM) in 1933 [1]. These two concepts, along with his regenerative circuit technique developed in 1912, formed the basis of radio frequency
  • Frequency Hopping and Unwanted Intruders
    radio (where a listener finds the specific radio frequency and listens to the message being sent) has an added element of security over a wire because message is usually encoded and the listener can only make sense of it when he/she has the appropriate receiver.
  • Ultra High Frequency (UHF) Connectors
    systems, closed circuit television (CCTV), civil defense, landing systems, ground control apparatus, ship-to-shore communications, and mobile radio equipment hookups between antenna and transmitters or receivers.
  • Receiver Testing with the Anritsu MS2830A Signal Analyzer, MG3710A Vector Signal Generator, and S412E LMR Master
    level. New spectrum allocations push public safety radios up in frequency near 3G and 4G transmissions. Digital radios such as those that utilize the APCO Project 25 (aka P25) standard react to interference differently from analog radios.
  • Broadcast FM Radio Tuner for Portable Applications
    This document applies to Si4702/03-C Firmware 19 and greater. Worldwide FM band support (76-108 MHz). Digital low-IF receiver. Frequency synthesizer with integrated VCO. Seek tuning. Automatic frequency control (AFC). Automatic gain control (AGC). Excellent overload immunity. Signal strength
  • Peter Cochrane
    THE earliest radio systems employed crude spark transmitters and cat's whisker crystal receivers. High voltages were generated using wire-wound inductors in much the same way we generate the ignition spark for today's internal combustion engines. The key characteristic of signals generated
  • Swept-Tuned Recievers
    range. Very basically, these analyzers "sweep" across the frequency range of interest, displaying all the frequency components present. The swept-tuned analyzer works just like an AM, except that on the radio the dial controls the tuning and instead of a display. r. The swept receiver technique enables

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