Telex Integrated Signal Processor ISP-100 User Manual

Users ManualISP-100INTEGRATED SIGNALPROCESSOR

viii10 July 1998 Table of ContentsPolarity Control (+/-) ...

8-3010 July 1998All filters in the ISP-100 are derived from analog prototypes. Theanalog filters are approximated by the Bilinear Transform method,pre

8-31Processing Components - FilterIn the ISP-100 highpass filters the passband slope is selectable from6 dB/octave, 12 dB/octave, 18 dB/octave, and 24

8-3210 July 1998The hinge frequency is defined as the frequency at which themagnitude of the filter response is changed by (approximately) 3 dBrelativ

8-33Processing Components - FilterThe EQ filters in the ISP-100 are full parametric. Each may beadjusted for center frequency, boost or cut, and bandw

8-3410 July 1998In the ISP-100 EQ filters the bandwidth is continuously variablefrom 1/12 octave to 3 octaves (which translates to Q between17.3 and 0

8-35Processing Components - FilterCutoff FrequencyThe cutoff frequency is the design frequency of the highpassfilter, and is only approximately repres

8-3610 July 1998text box without pressing the Enter key will cause the setting toreturn to the number that it was before a change was attempted.Altern

8-37Processing Components - FilterAlternatively, click and drag across the number in the box tohighlight the number in it. Type the new setting and pr

8-3810 July 1998Fine (F) or Coarse (C) ControlThis button determines the increment/decrement associated with theUP/DOWN arrows. Fine produces small st

8-39Processing Components - GainGainFigure 8-17 Gain component.Gain (see Figure 8-17) is the first function applied to all ISP-100 inputdata. The gain

ixGeneral Information Table of ContentsBypass Control (master)...

8-4010 June 1998to 0 dB and its polarity to positive (in-phase). Bypassing in a mutedchannel un-mutes it.MeteringThe meter located at the left of the

8-41Processing Components - Gain(i.e. after the master attenuator). A green LED indicates that themeter information is pre-fader. Clicking on the butt

8-4210 July 1998GateFigure 8-18 Gate component.A gate (see Figure 8-18) is used in situations where the input signal ischaracterized by long periods o

8-43Processing Components - GateClosing TimeA gate monitors the level of the input signal and controls thelevel of the output signal accordingly. When

8-4410 July 1998Detection Window is adjustable in the range 20 µSec (onesample) to 5 Sec.MeteringThe gate meter shows the attenuation applied to the s

8-45Processing Components - GateAlternatively, click and drag across the number in the box tohighlight the number in it. Type the new setting and pres

8-4610 July 1998LimiterFigure 8-19 Limiter component.A limiter (see Figure 8-18) is used in situations where the output signalmust not exceed a given

8-47Processing Components - LimiterRelease TimeA limiter monitors the level of the input signal and controls thelevel of the output signal accordingly

8-4810 July 1998Unfamiliar ControlsThere are two controls on the ISP-100 limiter that are not available intraditional dynamic range limiters. These co

8-49Processing Components - Limiterone. The two quantities are then compared and the larger isreturned as the signal level.When the Crest Factor Sensi

x10 July 1998 Table of ContentsFamiliar Controls ...

8-5010 July 1998Computation of Average LevelThere are two common methods of computing average signallevel; one is based upon RMS (Root Mean Square) ca

8-51Processing Components - Limiterincrease or decrease is controlled by the fine/coarse control.Attack, Window, Release, and Crest factor controls.Al

8-5210 July 1998SelectFigure 8-20 Select component.The select function (see Figure 8-20) allows you to set the source thatfeeds portions of a QuickMAP

A-1GlossaryGLOSSARYA to D Analog to Digital. Conversion of an analog signal to a digital representation.Amplitude factor See CREST FACTOR.Attack The

A-210 July 1998Cut To reduce a signal’s overall amplitude.D to A Digital to Analog. Conversion of a digital representation to an analogequivalent sig

A-3GlossaryGate A device or circuit which has no output until it is triggered into operation by oneor more enabling signals, or until an input signal

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B-1Standard QuickMAPsSTANDARD QUICKMAPSVUE-IT ships with eighteen standard QuickMAPs. These mappings were designed to be flexible enough to beapplied

B-210 July 1998MONDOEQ.QMS

B-3Standard QuickMAPs2X6CMBC.QMS

1-1IntroductionINTRODUCTIONAn Overview of the ISP-100Thank you for choosing the ISP-100™ for your signal processing needs.The ISP-100 is the first in

B-410 July 19982X8COMB.QMS

B-5Standard QuickMAPs3X6CMBC.QMS

B-610 July 19982X8THRU.QMS

B-7Standard QuickMAPs4CHAN.QMS

B-810 July 19984X6CMBC.QMS

B-9Standard QuickMAPs4X6THRU.QMS

B-1010 July 19983_2W.QMS

B-11Standard QuickMAPs2WAYS.QMS

B-1210 July 19982_3WAY.QMS

B-13Standard QuickMAPs2_2W_SUB.QMS

1-210 July 1998closures. This interface allows users to change system settings directlyand/or scroll through various settings.About this ManualThis ma

B-1410 July 19982_2W_FR.QMS

B-15Standard QuickMAPs2_2W_2ST.QMS

B-1610 July 19984_2WAYS.QMS

B-17Standard QuickMAPs4W_2FR.QMS

B-1810 July 1998LCR.QMS

B-19Standard QuickMAPsMONO3W.QMS

7/98P/N: 38109-744 Rev. ACopyright © 1997—98TELEX Communications, Inc.All Rights Reserved.Printed in USA9600 Aldrich Avenue SouthMinneapolis, MN 49107

2-1Setup & InstallationSETUP & INSTALLATIONIntroductionThis section details the setup and installation of the MERLIN ISP-100.Information is pr

2-210 July 1998Rear Panel Features (see Figure 2-2)Figure 2-2 ISP-100 rear panel features.1. AC Power—Connects to mains via an IEC type AC power cord.

2-3Setup & InstallationCard Installation ProcedureFigure 2-3 Battery/module tool.Figure 2-4 Card being inserted.1. Ground yourself using a wrist s

2-410 July 1998Cable DiagramsAnalog Audio (MIM-1, MIM-2, MOM-1)Figure 2-6 Analog inputs.Balanced Input from Balanced OutputConnect the positive (+) si

2-5Setup & InstallationBalanced Output to Unbalanced InputConnect the “hot” wire to pin 2 of the 3-pin female XLRconnector and the shield wire to

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2-610 July 1998Figure 2-10 AES/EBU output.AES/EBU OutputFigure 2-11 DB-9 to DB-25.Figure 2-12 DB-9 to DB-9.Connect the positive (+) side of the line t

2-7Setup & InstallationFigure 2-13 RFI choke data.RFI choke such as Steward PN: 28B2025-0A0 should be usedat the ISP-100 end of the cable. See Fig

2-810 July 1998Table 2-1 RS-232 signal pinouts for RJ-45, DB-9, and DB-25 connectors.Figure 2-16 Connector pinouts.The RS-232standard is verycommon to

2-9Setup & InstallationGeneral Purpose Inputs (GPI)Figure 2-17 GPI connector pinout.Figure 2-18 BNC cable example.Synchronizing to an external clo

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3-1TroubleshootingTROUBLESHOOTING> > > CAUTION < < <NO USER SERVICEABLE PARTS INSIDE. HAZARDOUSVOLTAGES AND CURRENTS MAY BE ENCOUN

3-210 July 1998DiagnosticsTable 3-1 LED diagnostic messages.The ISP-100 was designed with built-in diagnostics that activate whenpower is applied to t

3-3TroubleshootingFigure 3-1 About VUE-IT dialogRetrieving Version NumbersFigure 3-2 Properties dialog.Clicking on the star icon in the Project Manage

3-410 July 1998Changing the FuseThe universal switching power supply in the ISP-100 adapts to inputvoltages from 90 to 264 VAC, 50/60 Hz. To reduce ri

3-5TroubleshootingCaution: Use only the tool attached to the inside of the security cover tochange the battery. The tool is black anodized so it will

iGeneral InformationPROPRIETARY NOTICEThe Merlin product information and design disclosed herein were originated by and are the property of TelexCommu

3-610 July 1998Technical SupportTechnical questions should be directed to:Customer Service Department - MerlinTelex Communications, Inc.9600 Aldrich A

3-7TroubleshootingShipping to Manufacturer for Repair or AdjustmentAll shipments of Merlin products should be made via United ParcelService or the bes

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4-1SpecificationsSPECIFICATIONSComponentsCompressorProperty Range Default Fine CoarseBypass in/out out n/a n/aThreshold -60 dB to 0 dB 0 dB .5 dB 3 dB

4-210 July 1998LimiterProperty Range Default Fine CoarseBypass in/out out n/a n/aThreshold -60 dB to 0 dB 0 dB .5 dB 3 dBAttack Time 20 msec to 50 ms

4-3SpecificationsPEQProperty Range Default Fine CoarseCenter Frequency 20 Hz to 20 kHz 20 1/12 Oct. 1/3 Oct.Boost/Cut +12 dB to -12 dB 0 dB .1 dB 1 dB

4-410 July 1998Gate Linkwitz-Riley 3-way CrossoverNotch Filter Parametric Equalizer FilterPeaked HighPass Filter Shelving FilterAP is a trademark of A

4-5SpecificationsSystem MeasurementsSystem Frequency ResponseSystem Noise FloorSystem THD+NAP is a trademark of Audio Precision, Inc.

4-610 July 1998MIM-1 & MIM-2* Analog Input ModulesPowerSymbol Description Minimum Typical Maximum UnitsVA18P positive analog supply voltage 17.50

4-7Specifications MOM-1 Analog Output ModulePowerSymbol Description Minimum Typical Maximum UnitsVA18P positive analog supply voltage 17.50 18.00 20.0

ii10 July 1998ANY AND ALL IMPLIED WARRANTIES, INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITYARE LIMITED TO THE DURATION OF THIS EXPRESS LIMITED WAR

4-810 July 1998 MDM-1 AES/EBU Digital I/O ModulePowerSymbol Description Minimum Typical Maximum UnitsVA18P Pos Analog Supply Voltage 17.50 18.00 20.00

4-9SpecificationsPerformance(Sample Rate Converter bypassed)Symbol Description Minimum Typical Maximum UnitsFsSample Rate for Digital TBD 48 96 kHzInp

4-1010 July 1998Notes1 Per Analog Devices AD1890 data sheet, where applicable.2 With 6.144 MHz MCLK/2 input.3 20 Hz to 20 kHz, full-scale input, th

5-1Installing VUE-ITINSTALLING VUE-ITMinimum System RequirementsCPU: Pentium® processor.OS: Microsoft® Windows 3.1x, Windows 95, or Windows 98Memory

5-210 July 1998Figure 5-2 OS download request dialog.Figure 5-1 OS mismatch dialog.Updating the ISP-100’s Operating SystemThe updating of the operatin

5-3Installing VUE-IT5. Download the OS software file you need via the application whenprompted. See Figure 5-3 for more information. The default loca

5-410 July 1998Configuring the SoftwareTurn on the ISP-100. The power switch is located at the far right under thefront access panel. This is accomp

5-5Installing VUE-ITFigure 5-8 ISP-100 not detected dialog.If a dialog box like the one in Figure 5-8 appears in place of the one inFigure 5-7, the c

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6-1Getting StartedGETTING STARTEDStarting VUE-ITFigure 6-1 VUE-IT workspace.When VUE-IT is started, you will see a screen similar to the one in Figure

iiiGeneral InformationEnd-User License Agreement for Telex® SoftwareIMPORTANT – Please read this document carefully before using this product.THIS DOC

6-210 July 1998Starting a New ProjectFigure 6-2 Create new project dialog.To start a new project select New Project from the File menu. A panelsimilar

6-3Getting Startedused to create the QuickMAP. The QuickMAPs can be sorted by Name,I/O Configuration, Creation Time, and Modification Time. To sort th

6-410 July 1998Archiving ProjectsTo save a project for archival purposes do the following:1. Exit VUE-IT.2. Save the project directory and the four fi

7-1Using VUE-ITUsing VUE-ITVUE-IT has a variety of commands available to the user. These commandsare accessible via the menu items along the top of th

7-210 July 1998Edit (see Figure 7-2)Figure 7-2 Edit menu.Cut - Removes the selected item(s) and places them on the clipboard.Copy - Places a copy of t

7-3Using VUE-ITFigure 7-5 Windows menu.Cascade - Arranges panels in overlapping layers.Tile - Arranges panels side-by-side.Arrange Icons - Arranges mi

7-410 July 1998there is when changing between QuickSETs or using a GPI mute.The total time for ramp-up and ramp-down is twice the time specified.(i.e.

7-5Using VUE-ITQuickMAP LibraryThis is the directory under which QuickMAP templates are stored. Tomodify the path, click on the Modify... button locat

7-610 July 1998able to access ISP-100 statistics such as free memory, number ofQuickSETs, etc.Properties for the ISP-100Figure 7-10 ISP-100 properties

7-7Using VUE-ITProject PropertiesFigure 7-11 Project properties dialog.Project properties (see Figure 7-11) provides the user with informationon the n

iv10 July 1998 Table of ContentsINTRODUCTION ... 1-1An Overview of the ISP-100 ...

7-810 July 1998Configuration, etc.). The first click of the mouse will sort theQuickMAPs in ascending order and the second click will sort them indesc

7-9Using VUE-ITClicking on a component (i.e. Cut, Compressor, Limiter, etc.) in theProject Manager (see Figure 7-9) and then clicking on the Propertie

7-1010 July 1998Component ImportFigure 7-16 Component import dialog.To import component settings from the Project Manager, click on thedesired compone

7-11Using VUE-ITThe QuickSET Manager (see Figure 7-17) allows the user to develop andmanage multiple groups of component settings. The QuickSET Manage

7-1210 July 1998will appear, and the proper command can be selected from the list byclicking on it. The list displays the following options:Empty - No

7-13Using VUE-ITQuickMAPFigure 7-20 QuickMAP panel.Double clicking on the QuickMAP (name) entry or by clicking on the entryand then clicking on the De

7-1410 July 1998I/O Properties (see Figure 7-21)Figure 7-21 I/O properties dialog.InputThe Input Function controls the levels entering the unit. This

7-15Using VUE-ITOutputThe Output function controls the output levels from the unit.Using the Stereo ControlThis button controls the tracking of the Ga

7-1610 July 1998Status InformationFigure 7-22 Digital I/O status panel.Status information can be obtained for card slots 1 and 2 byclicking on the Sta

7-17Using VUE-ITDevice Status PanelFigure 7-23 Device status panel.Clicking on the entry next to the star icon (see Figure 7-9) and thenclicking on th

vGeneral Information Table of ContentsLowPass Filter ...

7-1810 July 1998Output MetersFigure 7-24 Output meter panel.The Output Meters (see Figure 7-24) provide monitoring of the outputs ofthe DSPs before di

8-1Processing ComponentsPROCESSING COMPONENTSThe components used in the VUE-IT interface have a wide variety ofcontrols for adjusting settings.Each co

8-210 July 1998CombineThe Combine component (see Figure 8-1) adds multiple input signalstogether and sends the sum to a single output. In QuickMAPs, 2

8-3Processing Components - CombineFine (F) or Coarse (C) ControlThis button determines the increment/decrement associated with theUP/DOWN arrows. Fine

8-410 July 1998CompressorFigure 8-2 Compressor component.A compressor (see Figure 8-2) is used in situations where the inputsignal has a greater dynam

8-5Processing Components - Compressorthreshold value, no compression takes place and the change inlevel of the output signal exactly matches the chang

8-610 July 19982.5 dB below the input level at the threshold. The divergencecontinues to increase gradually until approximately 6 dB abovethe threshol

8-7Processing Components - CompressorCrest Factor SensitivityA signal’s crest factor is the ratio of a its peak level to its averagelevel. The signal

8-810 July 1998input signal was going to be, then the Crest Factor Sensitivitycontrol would ideally be set to:SignalInputofFactorCrest1Since this quan

8-9Processing Components - Compressornot its compressor control settings. If multiple compressorsutilize the same channel as their sidechain sources,

vi10 July 1998 Table of ContentsINSTALLING VUE-IT... 5-1Minimum System Requirements ...

8-1010 July 1998Using the UP/DOWN ArrowsTo increase the level, click on the up arrow. To decrease thelevel attenuation, click on the down arrow. The a

8-11Processing Components - CrossoverCrossoverFigure 8-3 Two-way crossover component.Crossovers (see Figure 8-3) are used to divide the audio signal i

8-1210 July 1998The lowpass filter LP1 and the highpass filter HP1 may each beindependently configured as:Bessel 6 dB/octave (1st-order)Bessel 12 dB/o

8-13Processing Components - CrossoverTwo-way Linkwitz-Riley CrossoversLinkwitz-Riley designs constitute a special, even-order in-phaseclass of two-way

8-1410 July 1998implementation of Linkwitz-Riley crossovers, for which the ISP-100has been optimized. The filters marked optional in Figure 8-5 will b

8-15Processing Components - CrossoverIn the ISP-100, 3-way Bessel and Butterworth crossovers areimplemented as shown in Figure 8-6.Bessel crossovers u

8-1610 July 1998band and LP2 lowpass filter in the low band. The inclusion ofthese filters is mandatory for proper implementation of the 3-wayLinkwitz

8-17Processing Components - CrossoverFour-Way CrossoversFigure 8-8 Four-way crossover implementation.In the ISP-100, 4-way crossovers are implemented

8-1810 July 1998The attenuation in each band is continuously variable from -96 dBand 0 dB, plus mute.The polarity in each band is selectable as + or -

8-19Processing Components - CrossoverFour-way Linkwitz-Riley CrossoversFigure 8-10 Four-way Linkwitz-Riley crossover implementation.In the ISP-100, 4-

viiGeneral Information Table of ContentsOpenDevice Status Panel on Error ...

8-2010 July 1998A properly implemented 2-way, 12 dB/octave Linkwitz-Rileycrossover is characterized by:•2nd-order Linkwitz-Riley (Butterworth-Squared)

8-21Processing Components - Crossoverdepending upon whether 12 dB/octave or 24 dB/octave filters areused, respectively.The following sections will sho

8-2210 July 1998ClassTo change settings, click on the arrow next to the number in the textbox. A selection list will appear. The list may or may not b

8-23Processing Components - CrossoverFine (F) or Coarse (C) ControlThis button determines the increment/decrement associated with theUP/DOWN arrows. F

8-2410 July 1998CutFigure 8-11 Cut component.The Cut (see Figure 8-11) can apply as much as 96 dB attenuation, ormute completely, and invert polarity.

8-25Processing Components - CutFine (F) or Coarse (C) ControlThis button determines the increment/decrement associated with theUP/DOWN arrows. Fine pr

8-2610 July 1998DelayFigure 8-12 Delay component.Delay (see Figure 8-12) is used to compensate for differences in thephysical alignment of loudspeaker

8-27Processing Components - DitherDitherFigure 8-13 Dither component.Dithering (see Figure 8-13) is used when shortening high resolutiondigital audio

8-2810 July 1998numbers between 16 and 24 bits, inclusive. The bit level of the dithersignal should be set to the bit resolution of the destination fo

8-29Processing Components - FilterFilterFigure 8-14 Filter component.Filters (see Figure 8-14) are used to modify the spectral balance,frequency conte