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This slow acting gain control circuit provides ±10dB of leveling. Imagine, if you will, someone
that would continually insure that the output of the audio console was always within a specific
level. The “platform leveling” control circuit for the AGC is intelligent enough to know that if the
incoming audio level is correct it will shut down its operation and wait until gain correction is
needed. The AGC is therefor only operating when needed, eliminating the constant seeking of
unneeded level changes.
2)
Selectable
Phase Rotator
circuits that, when utilized, can assist in eliminating vocal distortion
during periods of heavier processing needs.
These specialized delay circuits create a “flywheel” effect on a certain range of frequencies. In this
case, audio within the main vocal range of 300Hz to 2kHz will change in phase as frequency
increases through the stated passband.
The reason we incorporate phase rotators is a problem created by the human voice. Most human
voices are asymmetrical in nature, meaning one side of the waveform is larger than the other. The
delay circuits of the phase rotators synthesize the symmetry of the waveform for vocal audio
through the passband. By doing this, the upper and lower crests of the vocal waveform are
processed more evenly.
For heavier processing situations, use of the phase rotators helps cut down on clipper induced
distortion on voices. For lighter processing requirements, the phase rotators can be defeated.
3)
Selectable and adjustable low frequency
Bass Enhancer
circuit that provides a deep, full, and rich
texture to the bass line.
This is not just another low frequency equalizer. This section provides up to a 12dB boost to the
bass frequencies as well as the harmonic rich sub-bass region. The enhancement scheme used here
generates that deep, rich, and full low end that is sought after by so many contemporary
programmers. Unlike the use of conventional equalizers, there is no exaggeration of the upper low
frequency range causing the bass to sound unnatural and “tubby.”
4)
The
Selectable Matrix Processing Option
allows the Unity AM to operate in either discrete
left/right or matrixed L+R/L-R processing for AM Stereo broadcasting. For detailed explanation
about matrix processing please refer to the technical description in the back of this manual.
5)
Phase linear 4-way
Adjustable Crossover Networks
that allow all processing to be tailored to
any format requirement. This network provides perfect linearity as well as ±.5dB of flat response
when summed back together. Frequency response along with harmonic integrity are totally
maintained with this network. Since the crossover frequencies are adjustable, all crossover points
can be tuned for the appropriate programming format.
