Wired Broadband and Related Industry Glossary of Terms with Acronyms As of 13 June 2011 Compiled By: Conrad L. Young, Director, Broadband Technical Strategy



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Slang for a communications satellite located in geosynchronous orbit. [Sat07]
Bit
(1)
Binary digit; a bit can be one of the two binary characters, either a 1 or 0. (2) A unit of information. One bit of information is sufficient to specify one of two equally likely possibilities.

Bits to Byte Diagram courtesy of Fiber Optics Info, http://www.fiber-optics.info/fiber_optic_glossary/b


Bit Depth

The number of levels that a pixel might have, such as 256 with an 8-bit depth or 1,024 with a 10-bit depth. [Fib111]
Bit Error Rate (BER)
The fraction of bits transmitted that are received incorrectly.

Bit Period

The amount of time required to transmit a logical one or a logical zero. [Fib111]
Bit Rate
The rate of a binary-coded transmission which is the number of bits per second.

BITE

Built-in Test Equipment; features designed into a piece of equipment allowing on-line diagnosis of failures and operating status. Status LEDs are one example. [Fib111]
Bits per Second (b/s)
Digital information rate expressed in the number of binary information units transmitted per second. Typically, a data channel is described as having a stated bit rate and a stated expected error rate.

Black Burst

A composite color video signal comprised of sync, color burst, and black video. Note: Black burst is used to synchronize (genlock) other video sources to the same sync and color information. Black burst generators are used in video studios to "lock" the entire facility to a common signal ("house sync" or "house black"). [ATI11]
Blanking (Picture)
The portion of the composite video signal whose instantaneous amplitude makes the vertical and horizontal retrace invisible.

Block Converter

An electronic device that converts a group of frequencies to a lower or higher group of frequencies. As an example, in satellite communications, a block converter is used to change C-band frequencies (3.7 to 4.2 GHz) to L-band frequencies (950 to 1450 MHz).[Arr11]
Block Downconversion

The process of lowering the entire satellite band of frequencies in one step to some intermediate range to be processed inside the video receiver.[Arr11]
Block Down Converter

A device used to convert the 3.7 to 4.2 KHz signal down to UHF or lower frequencies (1 GHz and lower). [Sat07]
Block Tilt
A method of setting the output levels of all low-band channels at a given number of dB lower than high-band channels.

Blocking Caps



Capacitors that block AC voltages to the drop. This reduces hum mod distortion and reduces surge damage to the drop.[Arr11]
Blue Laser

A type of laser( pronounced LAY-zer ) with a shorter wavelength than the red laser used in today's compact disc and laser printer technologies and the ability to store and read two to four times the amount of data. When available in the marketplace, personal computer users may be able to buy a laser printer with a resolution up to 2400 pixels or dots per inch at an affordable price. The same technology in CD and DVD players will provide a dramatic breakthrough in storage capability without an increase in device size. A laser (an acronym for "light amplification by stimulated emission of radiation") is a coherent (meaning all one wavelength, unlike ordinary light which showers on us in many wavelengths) and focused beam of photons or particles of light. The photons are produced as the result of a chemical reaction between special materials and then focused into a concentrated beam in a tube containing reflective mirrors. In the blue laser technology, the special material is gallium nitride. Even a small shortening of wavelength of light can have a dramatic effect in the ability to store and access data. A shorter wavelength allows a single item of data (0 or 1) to be stored in a smaller space. Red lasers used in today's technologies have wavelengths of over 630 nanometers (or 630 billionths of a meter). The blue laser has a wavelength of 505 nanometers. Shuji Nakamura, a Japanese researcher working in a small chemical company, Nichia Chemical Industries, built the first blue laser diode. However, a number of companies have announced progress in the ability to manufacture blue laser diodes and there are now prototypes of working DVD writers and players. Recently, a standard called Blu-ray has been developed for the manufacture of blue laser optical disc technology. [Wha10]
Bluetooth

A proprietary open wireless technology standard for exchanging data over short distances (using short wavelength radio transmissions) from fixed and mobile devices, creating personal area networks (PANs) with high levels of security. Created by telecoms vendor Ericsson in 1994, [1] it was originally conceived as a wireless alternative to RS-232 data cables. It can connect several devices, overcoming problems of synchronization. Today Bluetooth is managed by the Bluetooth Special Interest Group. [Wik1113]

^ "Bluetooth traveler". www.hoovers.com. http://www.hoovers.com/business-information/--pageid__13751--/global-hoov-index.xhtml. Retrieved 9 April 2010.
B-Mac

A method of transmitting and scrambling television signals. In such transmissions MAC (Multiplexed Analog Component) signals are time-multiplexed with a digital burst containing digitized sound, video synchronizing, authorization, and information. [Sat07]
BNC Connector

A bayonet-locking connector.[Arr11] Popular coax bayonet style connector, often used for baseband video. [Fib111] Also, the Bayonet-Neill-Concelman connector, the BNC connector is one of several radio frequency connectors on the market today. The name of the connector is derived from a combination of two things:

  1. the connecting technology employed; and

  2. the names of the two inventors of the device.

Paul Neill of Bell Labs and Carl Concelman sought to develop a connector that would employ a bayonet mount mechanism for locking. The two men perfected an earlier design and created this small connector that has been used for a number of applications over the last several decades. To fasten a BNC connector, push in and turn clockwise. To unfasten, push and turn counter-clockwise. A typical BNC connector is shown below. [War11]

Photograph of BNC Connector courtesy of The Warner Knowledge Base (FAQs), http://warnerinst-kb.com/questions/705/


BNF
Backus Naur Form. Also known as Backus Normal Form, it was the first metalanguage to define programming languages. Introduced by John Backus in 1959 to describe the ALGOL 58 language, it was enhanced by Peter Naur and used to define ALGOL 60. A formal metasyntax used to express context-free grammars. Backus Normal Form was renamed Backus-Naur Form at the suggestion of Donald Knuth. [Fre11]

BOC

Bell Operating Company (one of the 7 Bell Systems). . Related to “RBOC” (Regional Bell Operating Company), also .[Arr11]
Bonded Tape

An aluminum based metallic tape which is bonded to the dielectric of a coaxial drop cable to give a shielding effect.[Arr11]

Bonding


Telecommunications shorthand for Bandwidth on Demand Interoperability Group. A method for combining two ISDN B Channels into a single logical 128Kbps connections. Used most often for video conferencing and emulating a standard analog modem connection.

Bookmarks


A specific marked point in a Web document that allows quick access for returning to that point. When you want to easily return to a Web page, create a bookmark for it. This term is usually used by Netscape; Microsoft Internet Explorer calls these favorites.

Boom



The main portion of an off-air antenna that supports the antenna elements.[Arr11]
Boot Loader
The boot loader is a software component, provided with the host device, which is responsible for loading the entire software stack from the cable operator.

Boresight



The centermost area or peak signal strength of a satellite transmit pattern.[Arr11]
Bound application
Bound applications are those applications which are bound to, or associated with, a particular service made available by the cable operator.

BPDU


Bridge Protocol Data Unit

BPI


Baseline Privacy Interface

BPI+
Baseline Privacy Interface Plus Conditional Access (CA)

BPON


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