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LA Audio DPF3103 Operator's Manual

Dual programmable graphic, parametric, shelving equaliser and dynamics processor
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DPF3103
Dual Programmable Graphic, Parametric, Shelving Equaliser
and Dynamics Processor
OPERATORS MANUAL
Version 2.1
January 2001

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Summary of Contents for LA Audio DPF3103

  • Page 1 DPF3103 Dual Programmable Graphic, Parametric, Shelving Equaliser and Dynamics Processor OPERATORS MANUAL Version 2.1 January 2001...
  • Page 2 This page left intentionally blank.

  • Page 3: Table Of Contents

    CONTENTS 1. GETTING STARTED 2. INSTALLATION Inspection and unpacking Operating environment CE standards Power requirements Signal levels External connections Internal link option 3. WARRANTY 4. DESCRIPTION OF CONTROLS 4.1 MEMORY MANAGEMENT 11-13 Storing a Program Naming a Program Recalling a Program Comparing Scratch Pad Access 4.2 DIRECT ACCESS...
  • Page 4 10.1 EXTERNAL CONNECTIONS AES/EBU Out AES/EBU In S/P DIF Out S/P DIF In Word Clock 10.2 OPERATION Selecting & adjusting Parameters 40 10.3 FITTING THE DIGITAL I/O Before you start Procedure 11. SPECIFICATIONS 11.1 DPF3103 11.2 REAL TIME ANALYSER 11.3 DIGITAL I/O...

  • Page 5: Getting Started

    1.0 GETTING STARTED The DPF3103 digEQ MASTER is a Dual Channel digital processor that provides 31 band Graphic Equalisation, 3 band Parametric Equalisation, Variable High and Low Pass Filters, Shelving EQ, Gating and Compression/Limiting. RTA and Digital Delay are options.
  • Page 6 DOUBLE PRESS BUTTONS: The buttons on the DPF3103 are designed to speed up access to the digEQ functions. Most of the buttons need only to be pressed once, but some have a double press function.

  • Page 7: Installation

    2.4 POWER REQUIREMENTS The DPF3103 is fitted with a 'universal input' power supply and can therefore be used on all the commonly available mains supplies. However the connected supply must fall within the range 90V - 260V AC, 47Hz to 400Hz.

  • Page 8: Signal Levels

    2.0 INSTALLATION 2.5 SIGNAL LEVELS The DPF3103 has been optimised for +4dBu input and output levels. The adjustable GAIN range will allow other signal levels to be used but the noise, distortion and headroom performance may change from those quoted in the SPECIFICATIONS section.

  • Page 9: Internal Link Option

    2.0 INSTALLATION 2.7 INTERNAL LINK OPTION The outputs on the DPF3130 have power relays for soft switching and automatic bypass in the event of a power failure. However these relays can be configured, by way of internal jumpers, to mute the outputs rather than bypass - Jumper links fitted for power-down BYPASS mode (factory default) Jumper links fitted for power-down MUTE mode.

  • Page 10: Warranty

    To receive service under this warranty it is necessary to return the unit to an LA Audio authorised service centre or to the factory with a dated receipt as proof of purchase. After repair the unit will be returned to you free of charge.

  • Page 11: Description Of Controls

    4.0 DESCRIPTION OF CONTROLS 4.1 MEMORY MANAGEMENT The memory system of the DPF3103 is arranged into four main areas - Scratch pad - the working area where all editing is done Program - used to store up to 99 DPF3103 set-ups.

  • Page 12: Recalling A Program

    4.0 DESCRIPTION OF CONTROLS The name can be viewed in the SAVE, RECALL and COMPARE menus and on the HOME page. • Press ESCAPE repeatedly until you get to HOME page. Home page screen. • Press ENTER, cursor flashes under the first character. •...

  • Page 13: Comparing Scratch Pad

    You can of course RECALL a program and then COMPARE that with another Program. ACCESS: ACCESS has two functions depending on whether the DPF3103 is being used in stand-alone mode or as part of a networked system. STAND ALONE APPLICATIONS In the very unlikely event of a system crash switch off the POWER.

  • Page 14: Direct Access

    4.2 DIRECT ACCESS SELECTING CHANNELS FOR EDITING The DPF3103 is a dual channel unit which can be used as two separate processors or linked for stereo operation. When linked all adjustments are made equally to both channels. Some of the processors e.g. Graphic EQ allow different settings for each channel but still allows them to be linked.

  • Page 15: Gain

    4.0 DESCRIPTION OF CONTROLS SHELVING EQ In SHELVING mode the two (Blue) buttons at either end give access to FREQUECY (HIGH & LOW) and GAIN (cut or boost). GAIN: GRAPHIC Pre-EQ gain adjustment with ±20dB range PARAMETRIC Pre-EQ gain adjustment with ±20dB range DYNAMICS Gain-make-up adjustment for the Compressor.

  • Page 16: Function

    5, 10, 15, 20, 25, 30, 35 and 40 minutes. MACHINE MODE The DPF3103 can be a Master or Slave unit. In standalone mode i.e no Network detected, this defaults to 'Local Device'. If this is not set to 'Local Device' the front panel controls (except the DATA WHEEL and ENTER button) will not operate.

  • Page 17: Delay/Range

    Used to select parameters for editing in the Dynamics and Utility pages. KEYBOARD LOCK: To prevent accidental changes to the current set up of the DPF3103 the keyboard and DATA wheel can be locked. • Press and hold ENTER button.

  • Page 18: Displays

    Output in the UTILITY page, back-lit annunciators show selection. The 0dB led lights when +4dBu is present at the Input or Output of the DPF3103. GATE: These LED's provide a visual indication that the noise gate is closed i.e. signal muted.

  • Page 19: Description Of Main Functions

    LINKING WITH OFFSET: Offset linking on the DPF3103 means there can be different EQ and GAIN settings for Channels A & B, which can then be linked for overall adjustment. • Select Channel A and make adjustments. Repeat with channel B.

  • Page 20: Adjusting Individual Frequencies

    5.2 PARAMETRIC & FILTERS PARAMETRIC The parametric equaliser on the DPF3103 has 3 fully variable (frequency, gain and bandwidth) bands. Each band has -40dB cut and +15dB boost, 20Hz to 20kHz frequency range and 1/32 to 2 octave bandwidth adjustment. The large cut range and narrow bandwidth available make the equaliser ideal for notching out feedback.

  • Page 21: Selecting Channel A & B

    5.0 DESCRIPTION OF MAIN FUNCTIONS SELECTING CHANNEL A & B: To edit Channel A or B press it's associated CHANNEL SELECT button. LINKING CHANNEL A & B: • Press and hold CHANNEL SELECT A • Press CHANNEL SELECT B and release both buttons together. Or vice-versa.

  • Page 22: High And Low Pass Filters

    Filters. 5.3 HIGH & LOW SHELVING EQ The Shelving equaliser on the DPF3103 is a 2 band (High and Low), variable with ±8dB of cut or boost and a slope of 6dB/octave. • Press PARAMETRIC & FILTERS twice to access the SHELVING equaliser.

  • Page 23: Linking Channel A & B

    5.0 DESCRIPTION OF MAIN FUNCTIONS HIGH & LOW • Press HIGH or LOW to adjust the shelving frequency. The DATA WHEEL defaults to frequency adjust (DATA) mode. LINKING: Linking is the same as the Parametric EQ. BYPASS: BYPASS operates on the selected channel/s and only affects the Shelving EQ. 5.4 COMPRESSOR/LIMITER This is a fully specified dynamics processor with variable Threshold, Gain (Gain- make-up), Attack and Release.

  • Page 24: Expander/Gate

    5.5 EXPANDER/GATE The Expander/Gate on the DPF3103 has variable Threshold, Attack and Release with selectable Ratios including GATE and hard or soft knee. There are separate gain reduction and GATE closed LED's. Default settings (Program 00 or FLAT) for the...

  • Page 25: Selecting & Adjusting Parameters

    5.0 DESCRIPTION OF MAIN FUNCTIONS SELECTING CHANNEL A & B: Channel selection is similar to the Compressor/Limiter, please refer to section 5.4. LINKING CHANNEL A & B: Linking is similar to the Compressor/Limiter, please refer to Section 5.4. SELECTING & ADJUSTING PARAMETERS: Select the parameter with the buttons and adjust each in turn with the DATA WHEEL.

  • Page 26: Back-Up Battery

    5 years. If the low battery warning is displayed you should replace the battery as soon as possible to ensure you do not loose data. BEFORE YOU START: The DPF3103 contains dangerous voltages so ensure you disconnect the mains supply The unit uses Static sensitive devices so do take ESD precautions...

  • Page 27: Software Replacement

    7.0 SOFTWARE REPLACEMENT BEFORE YOU START: The DPF3103 contains dangerous voltages so ensure you disconnect the mains supply The unit uses Static sensitive devices so ensure you understand and implement Electro-Static-Discharge (ESD) precautions Do not touch the components on any of the printed circuit boards Hold the modules by the edges only.
  • Page 28 • To remove U34, use a PLCC extractor tool. If one is not available, use a small screwdriver inserted into the corner slots of the PLCC socket. Lever each corner a small amount in turn until the IC comes free. Take care not to lift one corner too much as this can bend the electrical contacts.

  • Page 29: Delay Option

    The Delay option consists of two memory modules which are plugged into the main circuit board of the DPF3103. Fitting instructions are given at the end of this section. 8.1 OPERATION The DELAY button brings up two menu screens allowing delay settings to be made in number of samples or distance and an adjustment of ambient temperature.

  • Page 30: Bypass

    BYPASS operates on the selected channel/s. 8.2 FITTING THE DELAY BOARDS BEFORE YOU START: The DPF3103 contains dangerous voltages so ensure you disconnect the mains supply The unit uses Static sensitive devices so do take ESD precautions Do not touch the components on any of the printed circuit boards Hold the modules by the edges only.
  • Page 31 8.0 DELAY OPTION Diagram showing position of Delay Modules.

  • Page 32: Real Time Analyser Option

    9.0 REAL TIME ANALYSER OPTION The Real Time Analyser (RTA) option for the digEQ is a plug-in DSP module which provides a filter based, 31 band analyser as defined in EN60651 for sound level meters. An RTA based on filters rather than Fast-Fourier-Transform (FFT), as used in the vast majority of analysers, offers a greater degree of accuracy and a faster response.

  • Page 33: Operating The Rta

    9.0 REAL TIME ANALYSER OPTION NOISE Switches the noise output level between Mic (-55dBu) and Line level (0dBu). 9.2 OPERATING THE RTA The RTA is operated through four main menus which are accessed using the RTA button - • Press the RTA button once to select ANALYSER •...

  • Page 34: Rta-Settings 1

    9.0 REAL TIME ANALYSER OPTION REFERENCE REFERENCE is used to shift the centre reference of the display i.e. to bring the measured values into range. REFERENCE can be adjusted in 10dB steps with the current value shown to the left of the display and on the top line. The actual function of the REFERENCE button depends on the signal source.
  • Page 35 9.0 REAL TIME ANALYSER OPTION RELEASE This parameter changes the release time of the display for both the ANALYSER and CORRECTION screens. Peak release times can be varied from 1.5s to 10s and 125ms to 1s for the average readout. PREAMP With this parameter selected use the DATA WHEEL to adjust the Microphone preamplifier gain in 1dB steps from 0dB to +60dB.

  • Page 36: Rta-Settings

    9.0 REAL TIME ANALYSER OPTION FLAT/REFERENCE: Pressing FLAT returns all faders to their default position i.e. 0dB, SENSITIVITY is not affected. SENS: Microphone sensitivity is accessed using the GAIN button. Use the DATA WHEEL to adjust sensitivity between 0 to 100mV/Pa in 0.1 mV/Pa steps. Selected value is shown on the top line.

  • Page 37: Correction

    9.0 REAL TIME ANALYSER OPTION If you wish to name the stored curve do this before STORE. See Section 4.1, NAMING A PROGRAM for details. The 'RTA Curve' name is shown above the 'Edited Program' name on the HOME page. When you have named a curve in the HOME page and pressed ESCAPE you will be returned to the RTA STORE menu.

  • Page 38: Fitting The Rta Module

    Secure the module with the three M3 pan head screws supplied • Plug the flying lead connector into J15 'RTA OPTION' on the DPF3103 main board • Replace the cover, plug in the mains connector and switch the unit on Press the RTA button and check the RTA menus are displayed •...

  • Page 39: Digital I/O Option

    Fixings for the RTA module. 10.0 DIGITAL I/O OPTION The Digital I/O module provides the DPF3103 with 24 bit AES/EBU and S/P DIF format digital inputs and outputs. With this module fitted the DPF3103 can have either analogue or digital inputs, however both analogue and digital outputs are available.

  • Page 40: External Connections

    10.1 EXTERNAL CONNECTIONS OUTPUT AES/EBU format balanced digital output on 3 pin XLR (male). INPUT AES/EBU standard format balanced digital input on 3 pin XLR (female). S/P DIF In Sony/Phillips format digital input on RCA Phono connector. S/P DIF Out Sony/Phillips format digital output on RCA Phono connector.

  • Page 41: Fitting The Digital I/O

    Option 1. will normally be used in stand-alone applications e.g. where the digEQ is used to convert between Digital input and Analogue output. Options 2. & 3. should be used when the DPF3103 is used with other digital equipment where sample rate synchronisation needs to be maintained.
  • Page 42 Fit the nut and washer supplied to the BNC ‘WORD CLOCK’ connector. Plug the flying lead connector into J16 'AES OPTION' • • With the component side of the Digital module facing down locate the connectors through the rear panel of the DPF3103...
  • Page 43 10.0 DIGITAL I/O OPTION From the rear of the unit fit four M2.5 x 8 pan head screws to position 'C' (Input • and Output XLRs) and the No. 4 self tap screw to position 'D' (S/P DIF connectors). • Secure the ‘WORD CLOCK’...

  • Page 44: Specifications

    11.0 SPECIFICATIONS 11.1 DPF3103 PERFORMANCE Frequency Response 10Hz to 20kHz ±0.5dB Input impedance 10k ohm balanced, 3 pin XLR-F Output impedance <10 ohm transformer balanced, 3 pin XLR-M Max input level +20dBu Max output level +20dBu Nominal level Dynamic range...

  • Page 45: Real Time Analyser

    11.0 SPECIFICATIONS EXPANDER/NOISE GATE Knee Hard or soft Threshold -60dB to 0dB Ratio 1:2, 1:3, 1:4, 1:6, 1:8, 1:16, GATE Attack time 20µs to 100ms Release 50ms to 5s INTERFACES MIDI Program change, SysEx or digEQ NETWORK POWER Power requirement 30VA @ 90-250VAC, 50-60Hz CONNECTORS Analogue input and output...

  • Page 46: Digital I/O

    11.0 SPECIFICATIONS 11.4 DIGITAL I/O Format AES/EBU and S/P-DIF Word size 24 bit Sample rate 44.1kHz, 48kHz and 96kHz compatible Inputs & Outputs AES/EBU - 3 pin XLR S/P-DIF - phono Word clock input...

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