QSC DSP-3' Manual descarregar pdf (Página 5)

Section 1: Introduction- Overview

The DSP-3 is a digital signal processor (

or DSP

) accessory for

audio power amplifiers designed to reduce the need for exter-

nal signal processing while increasing overall system reliability

through distributed intelligence. It is intended primarily for

QSC’s CX, DCA, and Powerlight2 series amplifiers and mounts

directly to the rear panel of the 2-RU models of these amplifiers.

Use of the DSP-3 with Powerlight models requires remote

mounting, external power supply and use of a special intercon-

nect cable. Refer to page 2 for application information. The

DSP-3 can also be used with amplifiers that do not have a QSC

DataPort ( older QSC models, non-QSC models) with a reduced

feature set and “remote” mounting/external power.

The signal processing capabilities include an Input Com-

pressor, multiple Parametric Filters, High- and Low-Pass Filters,

a Shelf Filter, Muting, Attenuation, Multiple Delays, Polarity

Reversal, Audio Routing and Post Crossover Audio Mixing.

Analog to digital and digital to analog converters are 24 bit

resolution, 48 kHz. sampling rate. Additionally, the post-DSP

output signals are daisy-chainable for connection to a second

amplifier. Input sensitivity is selectable and dynamic range is

greater than 95 dB. Inputs and the post-DSP outputs are

electronically balanced. See page 8 for complete listing.

Physically, the DSP-3 is a small module that “piggybacks”

onto the back panel of the specified QSC amplifiers. It connects

directly to the DataPort on the back panel and is secured with

supplied hardware. When used with other amplifiers, the DSP-

3 is mounted remotely on a rack-mount accessory that provides

a solid physical mounting platform.

Connections include two D-sub type connections; a DB-9

connector acts as the RS-232 interface and an HD-15 through-

connector provides the DataPort interface to a CM16a Amplifier

Network Monitor (if used). The amplifier-side of the DSP-3 has

the other end of the HD-15 through-connector that mates to the

DataPort on the rear panel of the amplifier. The “exposed” side

has two input connectors and two post-DSP outputs; these are

3-pin detachable terminal block connectors (also known as

“Euro” or “Phoenix” style connectors). There is also a 2.5mm

barrel-type (coaxial) power receptacle for using the DSP-3 with

older QSC amplifiers and non-QSC amplifiers. There are two

LED’s, a blue one to indicate power status and a green one to

indicate the presence of an input signal to the DSP-3.

Control of the DSP-3 is accomplished with the supplied

stand-alone software. Please refer to the software documenta-

tion for feature-set and operation information. This software

provides an easy-to-use graphical user interface where DSP

“objects” are drag-and-drop placed onto a palette and intercon-

nects are drawn. This interface allows for almost infinite

configuration possibilities for the end user. Connection of the

DSP-3 to the host computer is accomplished by either RS-232

computer port connection or by QSC’s CM16a Amplifier Net-

work Monitor. Once the DSP-3 has been setup as desired,

connection to the host is no longer required. This feature allows

essentially tamper-proof amplifier DSP setup. Further changes

can be implemented in the field by simply connecting a host (i.e.

laptop computer) and loading the new setup into the DSP.

Password protection is standard.

Note: Powerlight 6.0 and Powerlight 9.0 amplifiers require that pin #9 be removed from the remote

mounting interconnect cable. Amplifier damage may result from use of cable that has pin #9 connections present.

Normal VGA computer monitor cables have pin #9 removed and are usable. Check before use!

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