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SWR is used as a measure of impedance matching of a load to the characteristic impedance of a transmission line carrying radio frequency (RF) signals. This especially applies to transmission lines connecting radio transmitters and receivers with their antennas, as well as similar uses of RF cables such as cable television connections to TV receivers and distribution amplifiers.
Even in areas with high signal strength, basements and the interiors of large buildings often have poor reception. Weak signal strength can also be caused by destructive interference of the signals from local towers in urban areas, or by the construction materials used in some buildings causing significant attenuation of signal strength.
An SWR meter does not measure the actual impedance of a load (the resistance and reactance), but only the mismatch ratio. To measure the actual impedance requires an antenna analyzer or other similar RF measuring device. For accurate readings, the SWR meter itself must also match the line's impedance (typically 50 or 75 Ohms).
Time-frequency plot (bottom) shows high frequencies (150-200 Hz) in the ascending phase of the SWR. [ 1 ] Sharp waves and ripples ( SPW-R ), also called sharp wave ripples ( SWR ), are oscillatory patterns produced by extremely synchronized activity of neurons in the mammalian hippocampus and neighboring regions which occur spontaneously in ...
The company was founded as SWR Engineering, Inc. by its namesake, Steve W. Rabe. Rabe was known for his engineering work at Acoustic Control Corporation.After extensive research with top Los Angeles studio bassists, SWR released its first commercial product in 1984, the PB-200 hybrid tube/solid-state bass guitar amplifier.
This article originally appeared on Detroit Free Press: How cold is too cold for dogs? Skip the walk if you notice this. Show comments. Advertisement. Advertisement. In Other News. Entertainment.
The preparation of the dogs for the running was described as integral to the overall spectacle of Dogs That Cannot Touch Each Other. In the intermission, human trainers took meticulous care of the dogs, providing water and massaging them to relax their muscles, treating the dogs with the same level of attention as star athletes, as explained by ...
SWR Symphonieorchester, a radio orchestra affiliated with Südwestrundfunk SWR Vokalensemble , the vocal ensemble of Südwestrundfunk SWR Fernsehen , a German regional television channel