Tech Terms: What Every Telecommunications and Digital Media Professional Should Know

Q: QA (Quality Assurance QWERTY Keyboard

QA (Quality Assurance) QWERTY Keyboard

QA (Quality Assurance)

Level: 1

Definition: Systematic procedures in production or manufacturing to ensure standardization of product quality to meet or exceed preestablished targets or standards.

QAM (Quadrature Amplitude Modulation)

Level: 3

Definition: A sophisticated modulation scheme that uses variations in signal amplitude and phase of a carrier to produce different states of dataencoded symbols. An example of QAM is a modem that operates at high speeds. (See also Modem.)

QoS (Quality of Service)

Level: 3

Definition: Refers to the goal of providing network services (especially bandwidth) in a dependable and predictable way. For example, initiatives to design next-generation Internet technologies are paying close attention to QoS in everything they develop.

QPSK (Quadature Phase-Shift Keying)

Level: 3

Definition: QPSK is a digital frequency modulation technique used for sending data over coaxial cable networks. Because it is both relatively easy to implement and fairly resistant to noise, QPSK is used primarily for sending data from the cable subscriber upstream to the Internet.

Quadrature Amplitude Modulation

(See QAM .)

Quadature Phase-Shift Keying

(See QPSK .)

Quality

Level: 1

Definition: Degree or grade of excellence usually defined in terms of performance and the ability to meet certain standards. In communications systems, quality usually applies to technical performance and/or the ability of equipment, systems, software, networks, or other systems to achieve or meet stated levels of performance quality.

Quality Assurance

(See QA .)

Quality of Service

(See QoS .)

Quantization

Level: 3

Definition: Refers...

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