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Impulse noise
Impulse noise, bagaimanapun, adalah noncontinuous, terdiri dari pulsa tidak teratur atau lonjakan
suara durasi pendek dan amplitudo relatif tinggi. Hal ini dihasilkan dari berbagai penyebab, termasuk
gangguan elektromagnetik eksternal, seperti kilat, dan kesalahan dan kelemahan dalam sistem
komunikasi.
Impulse noise umumnya hanya merupakan gangguan kecil untuk data analog. Sebagai contoh,
transmisi suara dapat rusak oleh klik pendek dan crackles tanpa kehilangan kejelasan. Namun,
impulse noise adalah sumber utama dari kesalahan dalam komunikasi data digital. Sebagai contoh,
sebuah lonjakan tajam energi dari durasi 0,01 s tidak akan menghancurkan data suara tetapi akan
menghapus sekitar 560 bit data digital yang ditransmisikan pada 56 kbps. Gambar diatas adalah
contoh dari pengaruh noise pada sinyal digital. Noise berikut terdiri dari tingkat yang relatif
sederhana noise termal ditambah lonjakan sesekali impulse noise. Data digital dapat dipulihkan dari
sinyal dengan sampling gelombang yang diterima sekali per bit time. Seperti dapat dilihat, noise
kadang-kadang cukup untuk perubahan 1 ke 0 atau 0 ke 1.

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Impulse noise.docx

  • 1. Impulse noise Impulse noise, bagaimanapun, adalah noncontinuous, terdiri dari pulsa tidak teratur atau lonjakan suara durasi pendek dan amplitudo relatif tinggi. Hal ini dihasilkan dari berbagai penyebab, termasuk gangguan elektromagnetik eksternal, seperti kilat, dan kesalahan dan kelemahan dalam sistem komunikasi. Impulse noise umumnya hanya merupakan gangguan kecil untuk data analog. Sebagai contoh, transmisi suara dapat rusak oleh klik pendek dan crackles tanpa kehilangan kejelasan. Namun, impulse noise adalah sumber utama dari kesalahan dalam komunikasi data digital. Sebagai contoh, sebuah lonjakan tajam energi dari durasi 0,01 s tidak akan menghancurkan data suara tetapi akan menghapus sekitar 560 bit data digital yang ditransmisikan pada 56 kbps. Gambar diatas adalah contoh dari pengaruh noise pada sinyal digital. Noise berikut terdiri dari tingkat yang relatif sederhana noise termal ditambah lonjakan sesekali impulse noise. Data digital dapat dipulihkan dari sinyal dengan sampling gelombang yang diterima sekali per bit time. Seperti dapat dilihat, noise kadang-kadang cukup untuk perubahan 1 ke 0 atau 0 ke 1.