Bypass; Compressor - dbx 286A Bedienungsanleitung

Mic Preamp/
Mic Preamp/
Processor
Processor 286A
286A

Compressor

PHANTOM POWER Button and LED: When you use phantom powered mics
with your 286A, press the PHANTOM POWER button In to activate the 286A's
phantom power, providing +48VDC to the microphone through its connecting cable.
This industry-standard configuration supports virtually all currently-manufactured
phantom power mics. If you do encounter problems, it will typically be with an older
mic. Note that some mics may take several seconds to fully power up when phantom
power is applied. If you are using mics that do not require phantom power, press the
button so that it is in the Out position.
Note: Always plug in a condenser mic with PHANTOM POWER Off and gain levels down. Then switch the
PHANTOM POWER On and adjust the gain as needed.
The yellow PHANTOM POWER LED lights when the PHANTOM POWER button
is in.
HIGHPASS (80Hz) Button and LED: Press this button In to activate the 286A's
pre-processing third order filter. The HIGHPASS function filters out frequencies
below 80Hz by 18dB/octave before any compression, de-essing, etc., is applied to
input signal. This is most effective for reducing hum, rumble, wind and other low
frequency problems. The HIGHPASS filter is also before any external processing
provided via the rear panel INSERT jack.
The HIGHPASS LED lights when the HIGHPASS button is In.

Bypass

PROCESS BYPASS Button and LED: Press this button In to bypass the 286A
Compressor, De-Esser, Enhancer, and Expander/Gate processing circuitry and the
OUTPUT GAIN control (as well as any processing provided by external processors
via the rear panel INSERT jack). In Bypass mode, the 286A will apply gain and fil-
tering as set with Mic Preamp Section controls. BYPASS is equivalent to setting the
286A's Compressor DRIVE, De-Esser THRESHOLD, Enchancer LF and HF
DETAIL and Expander/Gate THRESHOLD controls to OFF, the OUTPUT GAIN
control to 0dB (12:00 position), and not connecting any external processing to the
rear panel INSERT jack. Bypass is especially useful for making comparisons
between processed and unprocessed signals.
The red PROCESS BYPASS LED lights when the PROCESS BYPASS button is
pressed In.
Note: The Compressor is Off when the DRIVE is set to OFF.
DRIVE Control: The DRIVE control determines the overall amount of gain reduction
by setting the signal level going into the gain control circuitry. Turning DRIVE
clockwise will increase the input signal, and therefore increase the amount of applied
gain reduction. Turning DRIVE fully counterclockwise (to OFF) allows the com-
pressor to pass all signals unattenuated, effectively bypassing the compressor.
Higher DRIVE settings can cause the Compressor Section to add substantial gain to
signal, especially with low input levels. For example, setting the DRIVE control to
12:00 can add up to 20dB of gain to low signal levels. With hotter input levels going
into the Compressor Section (whether from the MIC INPUT, LINE INPUT or
INSERT jacks), gain addition due to the DRIVE control will be less noticeable.
DENSITY Control: Use this control so speed up or slow down the program-depen-
dent release times. The scale is arbitrary because the release time is automatically
varied according to the nature of the program material (to minimize audible compres-
sion-induced side effects). The release rate is from 0 (a slow release for smooth com-
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