BW Broadcast DSPX-FM Specifications

DSPX-FMBroadcast Audio ProcessorOperational ManualVersion 3.11www.bwbroadcast.com

Quickstart10QUICK START1. Install the processor into the rack.2. Connect AC power to the unit, and turn on the power.3. Connect the analogue and / or

Introduction To Audio Processing11INTRODUCTION TO AUDIO PROCESSINGMost audio processors use a combination of compression, limiting and clipping to &ap

Source Quality And Pre-emphasis12SOURCE MATERIAL QUALITYThe DSPX-FM has the ability to substantially improve the quality of your ON-AIR broadcast. How

The DSPX And It's Processing Structure13THE DSPX AND ITS PROCESSING STRUCTUREThe DSPX broadcast audio processor can be used for processing audio

The DSPX And It's Processing Structure14couplings and complex gating features afford the user with full control of this important re-equalisation

Processing Block diagram15 ANALOG DIGITAL A/D SRC AGC LOW AGC MID1 AGC HIGH AGC HPF INPUT WB AGC MB AGC LPF BPF BPF HPF P.R. BASSSHELFB

Menu System Overview16MENU SYSTEM OVERVIEWThis section presents an overview of the four main menus and thier submenus and any parameters that are con-

Menu Structure17MENU STRUCTUREMENU: INPUT SOURCE STEREO MODE ANALOG INPUT LEVEL RIGHT TRIM INPUT FAIL SWITCH HIGH PASS FILTER PHASE ROTATOR

Processing Parameters18PROCESSING PARAMETERSThe 'INPUT' menu contains all of the options and parameters relating to the control and conditio

Processing Parameters19'GATE THRESHOLD' The gate function prevents 'suck-up' of noise during periods of silence or low level audio

Table Of Contest2Table Of ContentsWarranty 3Safety 4Forward 6Introduction to the DSPX 7DSPX connections 8DSPX meters 9Status L

Processing Parameters20'ATTACK' Controls the attack rate of the AGC, The time the AGC takes to respond to an increase of input level. The at

Processing Parameters21The 'MULTI-BAND LIMITERS' peak limit each of the bands to prevent distortion in the processors clipping peak control

Processing Parameters22'MIXER' menu. Each band can be adjusted over a small range to provide small EQ changes. These controls are limited in

Processing Parameters23the main clippers output level.'HF CLIP LEVEL' Controls the clip level of band 4. The clip level range is -12dB to 0

Processing Parameters24'DE-EMPHASIS' This controls the de-emphasis setting of the digital output. Options are Off, 50 μS (Europe) and 75 μS

Setting Up The Processing25SETTING UP THE PROCESSING ON THE DSPXThis section has more detailed information on setting up the DSPX’s processing. The se

Setting Up The Processing26High return to platform speed factors essen-tially freeze the AGC when gatedGain reducing during gating caused by the retur

Setting Up The Processing27The last gating option available to the wideband AGC is window gating. Window gating is separate from the silence gating th

Setting Up The Processing28Frequencies selectable: 60Hz, 76Hz, 95Hz and 120Hz. Q's selectable: 0.4, 1, 2 and 4. Gains selectable: 0, 1.5dB, 3dB,

Setting Up The Processing29To force gate a band you need to set the gate threshold control for that band to 'ON'. You then need to adjust th

Warranty3WARRANTYBW Broadcast warrants the mechanical and electronic components of this product to be free of defects in mate-rial and workmanship for

Setting Up The Processing30balance between peak and average energy in the detector. With smaller numbers more energy is transferred into the average c

Setting Up The Processing31DelayThe delay control sets the amount of time the processor will hold the gain reduction for before releasing at the peak

Setting Up The Processing32The mixerThe post limiters mixer in the DSPX is not strictly a mixer but a band output level control where small EQ chang-e

Setting Up The Processing33level for the bass (mix of bands 1 and 2) and leave the remaining half for the sum mix of the mid-clipper and the HF-clippe

Setting Up The Processing34and distortion that your listeners will find uncomfortable to listen to especially for extended periods of time. We also su

Setting Up The Processing35may not be immediately obvious. The HF clipping control (located in the band 4 limiter and clippers menus) redistributes co

Getting The Sound You Want36GETTING THE SOUND YOU WANTWhile the DSPX can help you obtain the sound that you want we must always take into account the

Getting The Sound You Want37ABOVE SUGGESTIONS THEN YOU PROBABLY HAVE A BIT MORE LEE-WAY. IT IS VERY EASY TO LOSE YOUR WAY ONCE YOU START 'CRANKIN

Getting The Sound You Want38Slow down the peak attack time for band 1, letting more through to the clippers.Speed up the release time of the average r

Getting The Sound You Want39Increase the band 4 look-ahead limiter attack time constant slowing down the attack of the secondary time constant circuit

Safety Instructions4DETAILED SAFETY INSTRUCTIONS:All the safety and operation instructions should be read before the appliance is operated.Retain Inst

Managing presets40MANAGING PRESETS (FRONT PANEL CONTROL)The DSPX-FM has an assortment of factory presets and provision for 8 user ones. While the fact

Factory Presets41FACTORY PRESETSThe factory presets in the DSPX are not supposed to be de-facto standards by any means but are starting points for you

Factory Presets42F18 DR NATURAL LOUDA competitively loud sound which enhances the vocals.F19 DR NATURALA nice balance of mids and highs provide a nice

Remote Control Application43REMOTE CONTROL OF THE DSPX-FMIn addition to the front panel LCD control system the DSPX-FM has a USB port, a serial port a

Remote Control Application44CONTROL OF THE DSPX-FM BY RS232 or USB (SERIAL)If you wish to use the RS232 or USB port to control the DSPX-FM follow the

Remote Control Application45PASSWORD ACCESS The DSPX-FM contains two levels of password control, a high level password which blocks access to all area

Remote Control Application46WORKING WITH PRESETSThe DSPX-FM remote application makes it easy to load, save and change presets. Click the preset button

Remote Control Application47Load presetLoad preset will change the default preset to the one selected. This usually means that this preset will become

Remote Control Application48SCHEDULING WITH THE REMOTE APPLICATION Using the menu tree to change the processing is quite simple and really doesn'

Remote Control Application49The dayparts can be layered so that one can override another. Let's say the default preset was U1:MAIN PRESET and thi

Safety Instructions5Object and Liquid Entry:Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through op

Remote Trigger Port50REMOTE TRIGGER PORTThe system menu contains the remote trigger port option from where it can be enabled or disabled.If enabled th

Security Code Locks51SECURITY CODE LOCKSThe system menu contains the security code lock options from where they can be enabled or disabled.The DSPX-FM

Clock Based Control (Dayparting)52CLOCK BASED CONTROL (DAYPARTING)Your processor contains a battery backed up real time clock that can maintain the cu

Specifications53SPECIFICATIONSSpecifications apply for measurements from analog left/right input to stereo composite output and to FM analog left/righ

Specifications54MPX outputSource Impedance: 10 Ohm Single-ended, floating over chassis ground.Load Impedance: 600 Ohm or greater.Maximum Output Level:

Installing USB Drivers55APPENDIXInstalling USB VCP DriversTo install the VCP drivers for the DSPXtra under Windows XP and XP SP1, follow the instructi

Installing USB Drivers56Select “Install from a list or specific location (Advanced)” as shown below and then click “Next”.Select “Search for the best

Installing USB Drivers57The following screen will be displayed as Windows XP copies the required driver files.Windows should then display a message in

Installing USB Drivers58The following screen will be displayed as Windows XP copies the required driver files.After clicking “Finish”, the Found New H

Appendix B - Preset Sheet59Preset 1 Preset 2 Preset 3 Preset 4INPUTSOURCEMODEANALOG LEVEL dBu dBu dBu dBuINPUT FAILHP FILTER Hz Hz Hz HzPHASE ROTATORP

Forward6FORWARDThank you for your purchase of the DSPX digital audio broadcast processor.Over the last decade the staff at BW have observed broadcast

Appendix B - Preset Sheet60MB LIMITERMASTER DRIVELIMITERS RATIOB1<2 COUPLING % % % %B2>3 COUPLING % % % %B3>2 COUPLING % % % %B3>4 COUPLIN

Appendix B - Preset Sheet61HIGH ATTACKHIGH DECAYOUTPUTSTEREOLEVEL dBu dBu dBu dBuPILOT LEVEL % % % %PILOT PROTECTION19kHz SYNC

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Introduction To DSPX7INTRODUCTION TO THE DSPXThe BW DSPX is a new generation of digital audio signal processor that can be used to process audio ready

Connections8LOWHIGHMIDHMIDLLOWHIGHMIDHMIDLWBLRLRMPXCLIPCLIPCLIPGATEINPUTAGCOUTPUTLIMITERSREMOTEAES/EBUEDIT0-3-6-9-12-15-18-21-24-27-30-33-2-4-6-8-10-1

Meters And Status LEDs9DSPX METERSThe DSPX has 182 LEDS that provide ‘always on’ instant IO and processing metering.I/O meteringThe input meters show