AEV MIRAGE MK III Manual - Halaman 7
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This function is situated on the front panel (switch no. 9). The status of the unit is displayed by
indicator leds on the front panel.
OPERATE mode indicates that the MIRAGE is enabled to process signals, BY-PASS mode
indicates that the MIRAG will not perform any operation on the signal (apart from that of 10
KHz filtering).
The IN/OUT level controls remain active.
This control determines the gain applied to low frequency signals upto a maximum of +10 dB.
The center frequency of the filter is at 65 Hz.
This adjustment can be used to make the sound "deeper".
This control determines the average frequency expansion gain upto a maximum of +6dB.
The control is effective over the band 300-3300 Hz.
This adjustment can be used to make the sound more "immediate".
This control determines the amount of expansion applied to higher frequencies upto a
maximum of + 6dB.
The control is effective over the band 3300-15,000 Hz.
This adjustment can be used to make the sound more "brilliant".
This control determines the amount of expansion applied to the signal before compression upto
a maximum of +10 dB. It is active over the entire audio spectrum.
With the control set at 0 no change to the sound takes place; at +10 dB the dynamic range is
reduced making the output sound more "aggressive".
It is recommended that this control is used in moderation since a large reduction of the
dynamic range will result in a "closing down" of the stereophonic signal.
AGC stands for Automatic Gain Control and automatically controls the gain applied to the input
signal.
Control is applied over the range -10 to +10 dB.
The user may vary attack time (DRIVE) and release time (RELEASE).
The speed of control is adjustable from 0.5 to 8db/sec (0.5 dB/sec is slow and 8 db/sec is
fast).
This circuit maintains the filter input levels more or less constant, within the limits of
correction; furthermore it will optimize input signals that have incorrect levels as a result of
a faulty source or operator error by automatically amplifying or attenuating the signal
accordingly.
It should be noted that fast attack and release times can result in undesirable "pumping"
effects.
It is generally speaking good practice to adjust AGC REL to be faster or equal to the AGC
DRIVE time (e.g. DRIVE from 2 to 4 dB/sec, REL at 4 dB/sec).
AEV Broadcast Srl via della Tecnica 33, 40050 Argelato Bologna ITALY
MIRAGE MK III - Broadcast Audio Processor
Processor adjustments
Operate / By-Pass operation
Bass
Presence
Brillance
Density
AGC Drive and Release
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