The coding NRZ , Not Return to Zero in English, is the simplest method to code a flow.

Rules of coding

Coding is on two levels: the signal will remain in a high state as long as of the 1 logics will be transmitted, and in a low state as long as of 0 logics will have to be transmitted.

Use

often between the computer and its peripherals, like the V24 junction

Advantages

Very easy to implement.

Disadvantages

No the transition generated at the time of a long sequence of 1 or 0, therefore difficult, even impossible synchronization. In do the example below, how much 0 have to be transmitted? For this reason, the Codage Manchester is preferred whenever flow to be coded can contain long sequences of 0 or 1 contiguous, such as for example on a network Ethernet.

References

Internal bonds

• NRZ
• Two-phase NRZI
• or Manchester
• differential Manchester
• simple Miller
• Bipolar or of a nature 2
• BHDn

External bonds

Random links:

Intel 8088 | Saint-Leger-under-Margerie | Pembroke (Malta) | Oswald Külpe | Estimate (Management of Project)