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Glossary

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BCC (Block Check Characters)

The original level 2 error checking scheme for character-oriented, link protocols.

The most common implementations utilized a two byte, algorithmically derived

character pair. BCC is equivalent to the CRC-derived FCS in bit-oriented link

protocols.

Bit Error Rate

The number of bit errors divided by the number of bits received.

Bit Rate

The speed at which bits are transmitted, usually expressed in bits per second (bps).

Block Error Rate

The number of block errors divided by the number of blocks received. Whether

there is one error or ten errors in a block, it is still counted as one block error.

Block Errors

Tells how many blocks had at least one error.

Block Sizes

The Bell system uses a block size of 1000 bits. CCITT, the world-wide standard,

uses a block size equal to the pattern size. For example, if the PRBS pattern is 511

bits, then the block size would also be 511 bits.

BOPs (Bit Oriented Protocols)

Bit Oriented protocols are level 2 protocols developed for a variety of system

requirements. Some of the more common BOPs are HDLC, SDLC, ADCCP, and

LAPB.

bps

Bits per second.

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Agilent Technologies J3916A Manual de usuario Pagina 154