A report on Non-return-to-zero
Binary code in which ones are represented by one significant condition, usually a positive voltage, while zeros are represented by some other significant condition, usually a negative voltage, with no other neutral or rest condition.
- Non-return-to-zero8 related topics with Alpha
Line code
3 linksPattern of voltage, current, or photons used to represent digital data transmitted down a communication channel or written to a storage medium.
Pattern of voltage, current, or photons used to represent digital data transmitted down a communication channel or written to a storage medium.
Common line encodings are unipolar, polar, bipolar, and Manchester code.
Manchester code
2 linksLine code in which the encoding of each data bit is either low then high, or high then low, for equal time.
Line code in which the encoding of each data bit is either low then high, or high then low, for equal time.
The price of these benefits is a doubling of the bandwidth requirement compared to simpler NRZ coding schemes.
Return-to-zero
1 linksReturn-to-zero (RZ or RTZ) describes a line code used in telecommunications signals in which the signal drops (returns) to zero between each pulse.
Return-to-zero (RZ or RTZ) describes a line code used in telecommunications signals in which the signal drops (returns) to zero between each pulse.
This means that a separate clock does not need to be sent alongside the signal, but suffers from using twice the bandwidth to achieve the same data-rate as compared to non-return-to-zero format.
Run-length limited
1 linksLine coding technique that is used to send arbitrary data over a communications channel with bandwidth limits.
Line coding technique that is used to send arbitrary data over a communications channel with bandwidth limits.
One of the simplest practical codes, modified non-return-to-zero-inverted (NRZI), simply encodes a 1 as a magnetic polarity transition, also known as a "flux reversal", and a zero as no transition.
Group coded recording
1 linksIn computer science, group coded recording or group code recording (GCR) refers to several distinct but related encoding methods for representing data on magnetic media.
In computer science, group coded recording or group code recording (GCR) refers to several distinct but related encoding methods for representing data on magnetic media.
GCR is a modified form of a NRZI code, but necessarily with a higher transition density.
High-Level Data Link Control
1 linksBit-oriented code-transparent synchronous network layer protocol developed by the International Organization for Standardization (ISO).
Bit-oriented code-transparent synchronous network layer protocol developed by the International Organization for Standardization (ISO).
On synchronous links, the data is NRZI encoded, so that a 0-bit is transmitted as a change in the signal on the line, and a 1-bit is sent as no change.
Bit rate
0 linksNumber of bits that are conveyed or processed per unit of time.
Number of bits that are conveyed or processed per unit of time.
In this case, the gross bit rate is equal to the symbol rate or pulse rate of 125 megabaud, due to the NRZI line code.
Bit stuffing
1 linksInsertion of non-information bits into data.
Insertion of non-information bits into data.
The NRZI coding scheme transmits a 0 bit as a signal transition, and a 1 bit as no change.