Specifications

TECHNICAL SUPPORT: 1.800.283.5936 (USA) OR 1.801.974.3760
GLOSSARY
142
Audio Processor A device that modifies an audio signal in response to
certain requirements.
Automatic Gain Control (AGC) Automatically increases or decreases
audio gain to maintain a consistent audio level.
Automatic Gating Automatically gates microphones on or off based on
input levels and other parameters programmed into the XAP 800.
Bandwidth The difference between the lower and upper 3dB end points of
an audio band. Also, the range or differences between the limiting
frequencies of a continuous frequency band.
Baud Rate The number of signal transitions per second, or the clock rate
of the serial bit stream in hertz. Given 7 or 8 bits for data plus start and stop,
the approximate ASCII character transmission rate is one-tenth the baud
rate.
Chairman Override Provides gating priority for all microphones selected
for the chairman override group. When a mic in this group gates on, all
microphones not included in this group gate off.
Clipping A condition in which a signal level exceeds the maximum level a
circuit can handle. This is usually caused by overdriving an input. It always
causes distortion and typically leads to listener fatigue and accelerated
failure of loudspeaker drivers.
Compression An induced reduction in the dynamic range of part or all of
an audio signal. Compression is usually used to protect individual
loudspeaker components from the damaging effects of transients.
Constant Directivity Horn Equalizer (CD Horn EQ) Horn drivers
commonly used in arrays in arenas and auditoriums have an inherent
6dB/octave high frequency rolloff. The XAP 800’s CD Horn EQ
compensates for this characteristic.
Crossover A device that passes designated frequency segments of an
audio signal to various loudspeaker elements in a sound system.
Crossover, Bessel A crossover using a low-pass filter design
characterized by a linear phase response. This results in a constant time
delay throughout the passband.
Crossover, Butterworth A crossover using a low-pass filter design
characterized by a maximally flat magnitude response. This results in no
amplitude ripple in the passband.