Ashly DPX-200 Bedieningshandleiding - Pagina 4

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1. Dimensions and Schematics

Operating Manual - DPX-200 Parametric Equalizer - Compressor/Limiter

4. MECHANICAL INSTALLATION

The DPX-200 mounts in a standard 19 inch equip-

ment rack. The mounting screw threads vary with differ-

ent rack manufactures and you should refer to your rack

instructions for proper hardware. An oval head or flat head

screw with a plastic countersink washer is preferred to

protect the finish of the DPX-200 under the screw.

This unit is housed in a rugged steel case and

will tolerate moderate abuse. However, for road systems

which may be dropped or otherwise subjected to extreme

forces, we recommend some rear support for the chassis

to prevent bending the front panel when these forces oc-

cur.

For installations where it is desirable to protect

the front panel controls from tampering or accidental

misadjustment, use the Ashly security cover. Installation

is simple and does not require removal of the equipment

from your rack. See your Ashly dealer for details.

Ashly Security Cover Installation

5. PARAMETRIC EQUALIZER CONTROLS

5.1 Equalizer Input Select Switch

The DPX-200 equalizer input is selectable be-

tween line level or mic input, each with its own connec-

tor.

The line level input is used for normal signal

processing, while the discrete mic input provides more

gain for those applications where the DPX-200 is used as

a comprehensive mic preamp. Press the input select switch

in for line input, and out for mic input

5.2 Gain

A single knob, dual function gain control is used

for both mic and line inputs. When the mic input is se-

lected, the gain range is from +20dB to +55dB. A -20dB

pad switch on the back panel allows for nominal 0dB mic

input level. When line level input is selected, the gain

control range is -

to +15dB. Unity gain for line level

signal is 0.

5.3 Phantom Power

+48V phantom power is provided to the mic in-

put XLR for use with condenser microphones. The phan-

tom power switch is on the back panel, and a red LED

near the power switch indicates that phantom power is

turned on.

5.4 Shelving Filters

The nature of a shelving filter is such that the fre-

quency response ramps up (or down) to a plateau and then

levels off again, hence the term "shelf". The DPX-200 has

a low and high shelving filter for general tone control or

correction. Using the outer concentric knob, the calibrated

frequency tick-marks indicate the halfway point between

unaffected signal and the frequency where the shelf flat-

tens out. The inner concentric knob is the level control for

that filter, and indicates the decibel level of the flat portion

of the shelf relative to the unaffected signal. The frequency

range on the low shelf is 40Hz-400Hz, while the hi shelf

range is 1.6KHz-16KHz. Both filters have a ±15dB boost

or cut, and can be switched in or out. A green LED turns

on when the filter is engaged.