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scrambler (SCR)

A scrambler(SCR) is a pseudo-random generator used to scramble binarysignals quasi-randomly. It is a multi-stage shift register in which the output signals of the individual flip stages are logically linked and fed back to the input of the scrambler.

The quasi-random sequence results from the linkage and the number of toggle stages of the shift register. Since the pseudo-random function is known, the digital signal can be converted back to the original signal after transmission in a descrambler.

Block diagram of a scrambler

Block diagram of a scrambler

A scrambler avoids constant signal patterns such as those that occur in idle state and provides a better distribution of signal energy over the frequency range. The scrambler turns each signal into a random sequence. Scramblers are used in most modems of the V-recommendations, for example in V.28, V. 29, V. 32, V. 34 and V.42.

Informations:
Englisch: scrambler - SCR
Updated at: 29.01.2019
#Words: 137
Links: standard context routing (SCR), shift register, digital signal (DS), transmission, descrambler (DSCR)
Translations: DE
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