(Alternating Current) - This is electrical current that varies from zero to a maximum value in one direction, or polarity, and returns to zero. It then reverses its direction (polarity) and rises to a maximum value in the opposite direction, and then returns to zero to complete the cycle. This cycle is repeated continuously. The number of cycles per second is its frequency, measured in hertz (Hz).
The 5.1-channel sound system specified in the Standard for Digital-HDTV. Also known as "Dolby Digital", AC-3 delivers CD-quality digital audio and provides five full-bandwidth channels for front left, front right, center, surround left and surround right speakers, plus an LFE (low frequency effect) subwoofer, for a total of 5.1 channels.
Advanced Spectrum Analyzer mode displays the amplitude of all carriers, beats and other RF sources in the user-selectable spectrum from 4.0 MHz to 1.0 GHz with a user selectable resolution bandwidth from 10.0 KHz to 3.0 MHz with a Zero Span Function. This allows you to perform a test for Ingress noise interference on the forward and return path.
(Automatic Frequency Control) - This is a circuit that automatically keeps an oscillator on frequency. When present on a TV set, the AFC control usually applies to the TV channel tuning section. It keeps the tuner locked to the channel selected.
(Automatic Fine Tuning) - This is a circuit that automatically keeps an oscillator on frequency. When present on a TV set, the AFT control usually applies to the TV channel tuning section. It keeps the tuner locked to the channel selected.
(Amplitude Modulation) - The process of impressing information on a radio frequency signal by varying its amplitude. Generally amplitude modulation is used for the purpose of relaying messages by voices, television, facsimile or other modes.
A device that boosts the strength of an electronic signal. In a cable system, amplifiers are spaced at regular intervals throughout the system to keep signals picture-perfect regardless of how far subscribers live from the headend.
A form of voice, video and data transmission that employs a continual electrical signal. A prevalent technology that reproduces sound waves to send local telephone transmissions, computer data and video signals.
(Advanced Television Systems Committee) - This is the government-appointed body in charge of defining the standards for new digital television systems.
Automatic Test mode on the 860 performs a sequence of operations specified by a user-defined macro. When enabled it will automatically run a set number of user-defined tests against user-defined pass/fail parameters. It can run immediately or you can specify an interval/count for POP tests.
