In TV and facsimile, pertaining to the signal or signal level that corresponds to the darkest part, i.e., the spot with the lowest luminance or reflectivity, of the object being scanned.

See pel, pixel.

In analog facsimile systems, a baseband frequency generated by scanning an object.
Note: Picture frequencies do not include frequencies that are present in a modulated carrier.

In TV and facsimile, pertaining to the signal level that corresponds to the brightest part, i.e., the spot with the highest luminance or reflectivity, of the object being scanned.

1. Program Identifier,
2. Personal Identification Device.

See segmented encoding law.

Synonym segmented encoding law.

Unauthorized access to a data processing system via an authorized user's legitimate connection. [2382-pt.8]

1. A short length of optical fiber that is permanently affixed to an active device, e.g., LED or laser diode, and is used to couple the device, using a splice or connector, to a longer fiber. [After FAA]
2. A short length of single-fiber cable, usually tight-buffered, that has an optical connector on one end and a length of exposed… (Read More →)

1. A signal, usually a single frequency, transmitted over a communications system for supervisory, control, equalization, continuity, synchronization, or reference purposes.
Note: Sometimes it is necessary to employ several independent pilot frequencies. Most radio relay systems use radio or continuity pilots of their own but transmit also the pilot frequencies belonging to the carrier frequency multiplex system.
2. See palm-top.