The bandwidth of the receiver - the bandwidth of the frequency spectrum of the intermediate frequency, passed to the input of the demodulator of the microwave signal. If the input signal-to-noise ratio exceeds the static threshold level by at least 3-4 dB, then the image will be optimal if the satellite channel width and receiver bandwidth are fully matched. In some models, it is possible to narrow the bandwidth in small increments. Such a narrowing is used at a reduced input signal-to-noise ratio and leads to clipping of the edges of the spectrum of the received signal. As a result, on the one hand, noise is reduced, but on the other hand, small details of the image are blurred. Severe narrowing of the bandwidth can lead to out of sync and tearing of the image. If the selected bandwidth is too wide, then it, together with the useful signal, allows additional noise to pass through, increasing the overall noise level. Bandwidth standards range from 16 to 36 MHz.
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April 25, 2024 05:25:56 +0300 GMT
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