Glossary - Intelix 4001 VC User Manual

Intelix VC Series Mic/Line Mixer User Manual

13.0 Glossary

25 EXT - Accessory card that provides access to input channel patch points. For 8-channel
models, provides remote volume control of channels 1, 3, 5, and 7.
Aphex® Aural Exciter® - Pseudoacoustical process that increases signal intelligibility by
adding supplementary harmonic information.
Balanced Line Input - Balanced, direct line level input to the summing junction that provides
an additional audio input source.
DB 25 Control Connector - Access point for DC control lines and auxiliary audio input and
output.
DC Control Points - External access points for gaining access to the DC-controllable circuits
of the mixer.
Dry Contact Closure - Contact closure (e.g. switch) that has no independent voltage supply.
Duck - To lower the volume level of a lower-priority audio signal while a higher-priority
signal is being broadcast.
Duck Amount - The amount by which the lower-priority signal is reduced when a higher-
priority signal is being broadcast.
Duck Release Time - The amount of time, after the higher-priority signal finishes broadcast-
ing, in which the lower-priority signal returns to normal volume.
Gain/Trim Control - Trim is the adjustment of the gain of the input stage to offset the differ-
ences between input signal levels. Gain is the ratio between the input and output signal levels
Ground Loop - A condition which can occur when several ground pathways exist between
two or more devices and which can cause hum in the audio signal.
Jumper - A short length of conductor used to connect pins electrically.
Limiter - A device that severely (at rates greater than 20:1) restricts the upper dynamic range
of a signal, by regulating the rate of increase of an input signal's amplitude so that it will not
exceed a predetermined threshold.
Line/Microphone Level - The two signal level ranges at which the mixer accepts input. Mic
level is usually -50 dBu and line level is usually +4 dBu
Low Cut Switch- Removes the lower-frequency (<150 Hz) components, which cause rumble,
from a signal.
Mute Control - Ability to mute upon command one or more selected audio channels.
Phantom Power - A method of powering condenser microphones by sending DC current
over the same mic cable that carries the audio signal. Called "Phantom" as there is no visible
power cord and the voltage is not perceptible in the audio signal.
RCA Connector- an unbalanced line level connector. Called "phono connector", as it is
commonly used as for the output of phonographs.
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