Abbreviation for quasi-random signal. A signal consisting of a bit sequence that approximates a random signal. [T1.201-1989] The unframed QRS (QRSS, QRTS, QRW) for DS1 consists of a PRBS with a 20-stage shift register with a constraint that forces the "put to a one" when the next 14 bits in the sequence would be zeros. The QRS generates every combination… (Read More →)

Abbreviation for quasi-random signal source.

Abbreviation for quasi-random test signal.

Abbreviation for quasi-random word.

Quality of Service Specification

A group of four wires composed of two pairs twisted together.
Note: The pairs have a fairly long length of twist and the quad a fairly short length of twist.

A cable formed of multiples of quads, paired and separately insulated, and contained under a common jacket.

[A] short name referring to technology that provides tamper-resistant protection to crypto-equipment. [INFOSEC-99]

Synonym parabolic profile.

1. The state of being separated in phase by 90° (/2 radians).
2. Pertaining to the phase relationship between two periodic quantities varying with the same period, that is, with the same frequency or repetition rate, when the phase difference between them is one-quarter of their period.