Ashly DPX-200 Betriebshandbuch - Seite 7

Blättern Sie online oder laden Sie pdf Betriebshandbuch für Stereo-Entzerrer Ashly DPX-200 herunter. Ashly DPX-200 20 Seiten. Parametric equalizer compressor/limiter

Seite drucken

1. Dimensions and Schematics

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

The input meter takes its signal just after the gain con-

trol, and will indicate input signal level regardless of out-

put levels or limiter settings. The output meter display

takes its signal from the actual output of the unit, so ev-

ery control that affects the output will also have an effect

on output meters. Used in conjunction with the gain re-

duction meters, input/output meters prove to be an ex-

tremely useful diagnostic tool when working with system

dynamics and level control.

7. CONNECTIONS AND CABLES

7.1 Balanced and Unbalanced Audio Connections

Balanced signal connections are preferred in pro

audio applications because of their improved immunity

to induced hum and noise. A properly shielded and wired

balanced input stage on any audio product will reject most

unwanted noise (RFI, EMI) picked up by the cable, as

well as minimize ground loop problems. Therefore it is

always advantageous to use balanced connections when

running signal more than ten or fifteen feet, although par-

ticularly noisy environments may require that even short

patch cables be balanced.

Unbalanced connections are used mostly for short

distance, high level signals (0dBu nominal). Most exter-

nal EMI noise pick-up will be

masked under the noise floor of the

signal, assuming there is little or no

gain following the unbalanced signal.

If a gain stage does follow a signal,

or if externally sourced noise per-

sists, use balanced connectors.

7.2 Inputs and Outputs

The DPX-200 uses two dif-

ferent audio connector types. 1/4"

TRS (tip-ring-sleeve) phone jacks,

and three pin XLR connectors will al-

low interfacing to most professional

audio products. Ashly TRS balanced

connections use the tip as (+) and the

ring as (-) signal, with sleeve used for

ground. Ashly XLR connectors use

pin 2 (+) and pin 3 (-) with pin 1

ground. Inputs are 20K

sion 1% metal film resistors, outputs are 200

balanced", which means they have balanced impedance

with a single-ended signal source, and can be wired bal-

anced or unbalanced. When possible, we recommend

balanced connections between all components in your

system.

If inputs are used unbalanced, the signal should

be on the (+) connection and the (-) connection must be

tied to ground, or signal loss will result. While a mono

phone plug used as an unbalanced connection will auto-

matically ground the (-) ring of the jack, XLR's will not

automatically do this, so attention must be given to proper

wiring.

7.3 Chain Switch

The chain switch on the back panel allows the

output of the parametric equalizer to be fed directly to

the input of the compressor/limiter, with no external cable

required. When the chain switch is in, the input connec-

tors to the compressor/limiter are removed from the cir-

cuit, while the equalizer outputs remain functional.

7.4 Compressor/Limiter Detector Loop - Ducking

Audio Connector Types

active balanced using preci-

"pseudo-

The DPX-200 com-

pressor/limiter has a TRS In-

sert DETECTOR PATCH

point which can be used as a

"ducking" input, or in con-

junction with an equalizer to

produce frequency-sensitive

limiting. Various uses of the

detector patch are discussed

under TYPICAL APPLICA-

TIONS.