Parts Express - Tech Terms Glossary

Tech Terms Glossary

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Lag: The image retention of an object after the object has been scanned. Sometimes, it causes smearing effect.

LCR Meter: Digital tester that measures inductance (L), capacitance (C) and resistance (R).

Le: Inductance. Usually specified for a voice coil of a speaker driver.

Line Conditioner: Processes AC voltages such that they are free of potentially harmful voltage variations that are inherent to many municipal electricity sources. The result is a consistent signal that is suitable for sensitive equipment.

Line Lock: To synchronize the field sync pulses, of an AC powered camera, to the frequency of the voltage input (line voltage). looping: A term indicating that a high impedance device has been permanently connected in a parallel to a video source.

Lithium Ion Batteries: A type of small rechargeable battery containing lithium, a light, highly reactive metal. Lithium ion batteries tend to have very long shelf life and can last for years in low-current applications. Typical uses include the powering of cellular phones, digital watch LCDs and memory backup in computers. An improvement over nickel cadmium batteries both in smaller size and lighter weight.

LNBF (Low-Noise Blocking Filter): Mounted on a satellite dish to collect, convert and amplify the satellite signal reflected form the dish.

Looping: A term indicating that a high impedance device has been permanently connected in a parallel to a video source.

Loudness: Automatically adjusts bass enhancement depending on volume level.

Lv: The length or depth of a vented speaker cabinet's vent.

Lux: A unit of measuring the intensity of light. (1 FC [footcandles]= 10 lux).