Symetrix 528 - Mic Preamp and De-esser Controls

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SIDBCHAIN
The SIDECHAIN connections provide access to the dynamic range processor's
control circuit, via terminals 8, 9 and 10 on barrier strip TBl.
Output impedance of the SIDECHAIN is < 100 ohms , minumum load impedance is
600 ohms. Maximum output level is + 18 dBm. Input impedan ce is > 20k ohms,
maximum input level is +18dBV.
NOTE
Patching and sidechain connections provide an output / input loop in
the circuitry. For signals to flow from the 528's input to output, the
connection through these termina t ions must remain intact. Therefore,
the patching and sidechain terminations are "normalled" by shorting
straps installed at the factory . All terminal pairs that must be
normalled are indicated by "U" shaped chassis markings over the
barrier strips. The shorting straps may be removed when signals are
routed elsewhere for processing, or when individual sections of the
528 are used for signals not originated at the 528 ' s input.
2.6 Mic Preamp Controls
PREAMP GAIN
Sets the . gain of the microphone preamplifier, from 10 (3dB) at its most
counterclockwise rotation, to S0dB at its mo s t clockwise rotation .
CLIP
Illuminates when preamp output levels reach +16dBm.
PHANTOM POWER
On the rear panel near the line output jack, this switch turns on + 48VDC
phantom power for condenser microphones, applied v ia pins 2 and 3 of the XLR
input connector.
2.7 De-esser Controls
DB-BSS FREQUENCY
Selects the frequency range to be placed under the control of the de-esser .
DB-BSS RANGE
Determines how much the selected frequ e ncies will be attenuated . At 0dB the
de - easer is essentially out of the circui t , while at 20dB all signals within the
selected frequency range will be attenuated 20dB.
BYPASS
Enables / disables the de-esser .
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