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Telex ISP-100 Network Card User Manual

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1. Gate Linkwitz Riley 3 way Crossover d d J E F 5 5 5 102 108 114 120 4428 2 LTA 126 114 102 90 84 78 72 66 60 54 48 42 36 30 24 18 12 6 0 100 200 500 dBFS Hz Notch Filter Parametric Equalizer Filter n E NG E 18 pn 27 E d E d d Po TEE 8 E S S LH 36E 36 E E 90 42E 42 96 E 102 _ 108 48 f 48 7 4 Eua E 120 eL 126 E _ 132 P Ea LLL 138 20 50 100 200 500 1k 2k 5k 10 20k 100 200 500 1k 2k 5k 10 20k Hz Hz Peaked HighPass Filter Shelving Filter E p ERE 2 0 8 lt 1 12 16E 16 a i 20 3 20 d E SS d B L F E Loy 7 F 5 E 5 8 28 28 t 32 L 3 36 E 36 Hi 40 44 48 48 10 20 30 40 50 60 70 80 90100 100 200 500 1k 5k Hz Hz AP is a trademark of Audio Precision Inc 10 July 1998 o mua omoa omoa Ee System Measurements System Frequency Response 1 Ap 0 75 0 5 0 25 0 0 25 0 75 1 2 a 1 75 Og bb EEELELELEI k 2 LLLLLLLLLLEEEEEEEEEEELLEEELLEEEE
2. 7 11 EI Y 7 11 Discarding GANGES scio Hb Asker adu HERUM RE 7 11 7 11 ORO 7 11 Testing the GPI 7 12 mq 7 13 QuickMAP C mponent 51 7 13 VO Properties EE E E EEEN 7 14 E E E E 7 14 7 15 Digital e E 7 15 Status 7 16 8579 2211 Panel Ro 7 17 Clock SYC P 7 17 Bs cr me vr 7 17 Ki deci Tm 7 17 See RR E C c 7 17 gioi oW 7 17 jue C 7 18 PROCESSING COMPONENTS 8 1 8 2 Input ipu memet 8 2 Fine F or Coarse Control 8 3 General Information EN DP h M1 Table of Contents Polarity Control 585 c MM 8 3 Mute e EL ES 8 3 Bypass Control master
3. 95 006 50 9 H3HLIG ge 006 9 9 Ve Ve ve AV 13d AYM Z 199135 006 9 av Av 13d 95 006 SONV4 9 SONVd 9 Vi YILAN Vi Y ANNVC t 1231348 9 006 9 99 as Av 13d 006 9 SaNva 9 VS HSHLIC AV T3d S ANN C 9 199195 8I NI anvo F lt VI NI VI NIVO b 10 July 1998 2WAYS QMS SINV8 0 al 2 9 9 1293138 OL 12 S 2 VI 10d 13S 1 008 OL lt LNO 006 0L lt 4 ve Av 13d 8s 1no 9 0061 OL lt 99 vs LNO 008
4. Vi 006 SANV4 OL LOLZ de Av 3d de 3NISINOO 006 sanya 01 LOL Ve ve ve ve 3NISINOO 995 006 5 OL LOLZ H3LIAFT dv ANISGNIOS 006 0 LOLZ Vv V AV 13a Vv 3NISINOO gt 95 006 OL LOLZ as as gs Av 130 as sasu 006 OL LOLZ 2 VS VS AV 13d VS 3NISINOO NI Standard QuickMAPs 2X8COMB QMS gc LNO vc LNO ge LNO NI dai NIVO 006 SINV8 LOLZ az 92 gz Av 13a gz 92 3NISINOO 2esu 006 SQNVa LOLZ AV 3NISINOO 006 SQNVa LOLZ ge ge AV ge
5. Av 13d 006 SQNV8 ve YS LINN ve AV 13d ve 6193188 006 ar St ar AV ar 006 Aviad V 2 YI t 9313 006 as 99 Av 13d 8s 006 VS AV T3 8 2 S 9 199138 NIVO s VI NI 10 July 1998 4W 2FR QMS 11014 39NVMH 11014 lt LNO GIIN MOT NIVO 0061 2 YILIN avaa 119 QOEL 2 ve Av 13a ve Ygl ve LND 193135 0081 av Av 13a gr 0061 SINVH 2 H3HLIG Vb Vb 2 AYM t VL 199195 oes 0061 SONVH 2 as YILIN gs Av 13d as 006
6. 5 OpenDevice Status Panel oh EITO 7 4 Display GuickMADP Pop Up names 7 4 Display Filter Bandwidth nemen rnnt nto ntn n tee 7 4 System COME UNS 7 4 New ace 7 4 G mponent eet tudo ea turco 7 4 QuickMAP Library A 7 5 Name c 7 5 Designer s Name tm 7 5 he gt sereia 7 5 Default Preference 7 5 AVANCE 7 5 Properties Tor 5 100 RE EU 7 6 eee reer errr 7 7 6 RI TTE T E Oo T 7 7 QuickMAP Properties aii asap oaa 7 8 Component Properes 7 8 Component EXPO 7 9 Gomponent Mpi m t 7 10 QuickSET Manager 7 10 Creating c s Eee icri 7 11 81 9 7 11 Selecting the Active
7. 92 V2 NIVO NIVO 0061 01 az ge de YILIN Av 13a ge 1no ge aivo dz 1593138 0061 01 Ve YILIN Av 13a We LND 31 9 Ve 103135 0061 OL Av 13d gs 1no gs 31 9 gi dari 199198 0061 OL vi VS VS AN 13d WS 119 VS 319 Vb VL 10318485 VI Standard QuickMAPs B 8 4X6CMBC QMS gas LNO gz NIVO V6 NIVO NIVO VV 006 9 LOL ge H3 LINTT de AV dL 14 006 9 LOL Ve ve AV 13d ve 3NISINOO 006 9 LOL gr av Av 945413 3NIHWOO 95 006 9
8. VG Av 13a VV NIVO Standard QuickMAPs 1104 2 HOIH ino 9 006 8 de de uaria ve LNO 95 006 8 9 006 ve Av 95417113 AYME Ve daria 108135 ab 1 oesu 006 8 St YILIN ap ar Vv LNO oesu 006 Vi YILIN Vt AV I3Q 9 dali gi 199138 1no oesu 006 8 as Av 3d as WS LNO 9 006 8 o9su 006 VS vs AV T3 WS AYM YL Vi dari 108188 VZ NI MS al NI VENI VI NIVO gt 10 July 1998 5 AONVY TINA 11014
9. Fites DTS 640 09 3171998 16 08 45 Component Description Presets for DTS 640 configuration Cancel Figure 7 16 Component import dialog To import component settings from the Project Manager click on the desired component entry in the project manager see Figure 7 9 and then click on the Import button You will then see a dialog box like the one in Figure 7 16 The Import Component dialog displays currently existing component presets filenames in the upper half of the dialog box These files can be sorted by clicking on the Name Type Group and Mod Time heading buttons The first mouse click on one of these buttons will sort the list in ascending order and the second click will sort the list in descending order The lower half of the dialog box displays notes on the component preset currently selected in the upper half of the dialog box QuickSET Manager Active Component Gain 14 Active QuickMAP Active QuickSet QuickSET 1 E Update Figure 7 17 QuickSET manager dialog 10 July 1998 ooo The QuickSET Manager see Figure 7 17 allows the user to develop and manage multiple groups of component settings The QuickSET Manager is opened when a component is opened Creating New QuickSETs 1 d iride The user can name a group of settings by clicking on the New button pin NR and then entering the name in the pop up window and clicking on
10. 7 1 Activate Project Managert exacte iieii son E E EE 7 1 Activate 7 1 Exibe n e e E PECES 7 1 Most Recently Used 7 1 zem E Ee 7 2 T 7 2 COPY e 7 2 T e 7 2 7 2 Pre SSM actae iei aisi cst titius 7 2 P 7 2 7 2 Preferentes 7 2 System OMI AMONG ee pn etu en tete LU a edid 7 2 uoc 9 w Y es 7 3 7 3 e 7 3 Arange lCONS 25 a 7 3 c eet cee a P 7 3 MM 7 3 7 3 Ramp NP I OO OE SL 7 3 Display Recently Opened Files in the File Menu 7 4 10 July 1998
11. 4 10 x Ert 4 10 General Information EN w h w Table of Contents INSTALLING 9 1 Minimum System Requirements nennen nennt nne 5 1 identifying a Serial 5 1 Loading the eon 5 1 Updating the ISP 100 S Operating System aree conta og Pai e iate 5 2 Configuring the SO BWBTO cumin inani USER 5 4 GETTING STARTED 4 2e 6 1 13 2 S 6 1 Starting a Mew 6 2 VUEIT File Syste M TP 6 3 Archiving 6 4 6 4 QuickMAP Template Files nennen nennen nene 6 4 Component Directory e 6 4 Operating System OS Files 2 ERR RS ERREUR REIR 6 4 2 ces ac cde sc eee een 7 1 New 7 1 7 1 SC n 7 1 SAVE
12. 8 51 Control sr sonet essetis eris crc 8 51 Bypass Control E 8 51 Sle Ea 8 52 Selecting the Input e 8 52 STANDARD QUICKMAP LIBRARY 1 10 July 1998 WY The four in eight out configuration ie only possible when the second card slot contains a digital 1 0 card INTRODUCTION An Overview of the ISP 100 Thank you for choosing the ISP 100 for your signal processing needs The ISP 100 is the first in a line of high quality signal processing products from TELEX Communications Inc s Merlin division The ISP 100 represents a continued commitment to understanding and meeting our customers needs through the development of innovative and intuitive solutions The ISP 100 is designed with flexibility in mind which results in a powerful tool that allows you to adapt to ever changing markets and applications The utmost in quality is also a prime directive in the design and manufacture of this product series of predefined signal path topologies called QuickMAPs are offered which enable the designer to quickly define the system s processing structure This approach allows for a continuation of new processing solutions and or variations that provide market specific templates to help minimize your design ti
13. 3NISINOO 5954 006 LOLZ AV Ve 3NISINOO 9954 006 SONVE LOLZ Sy gr AV 13d 3NIgWOO 006 LOLZ Vt Y3HLIA Vt Vv Vt 3NISINOO 006 LOLZ as 95 gs AV 13d gs gs 3NI8INOO 006 LOLZ j VS VS VS AV1d VS 3NISINOO VI NIVO 10 July 1998 3X6CMBC QMS ge LNO LNO av LNO LNO as LNO VS LNO Ve NIVO NIVO Vi 006 8 LOLE ge g Av 130A 3NISINOO N 006 0 8 LOLE ve ve AV 13d ve 95 006 8 LOLE ar ar av AY130 av 006 8 LOLE SALIATT Av 13 3NISINOO desl 006 8 LOLE 8s Av 13d gS 3NISINOO 006 8 LOLE 7 VS VS
14. Vt S3LINWET AV 130 Vb 3NISINOO 9954 006 9 LOL as as 99 Av 3d gs 3NIgWOO 006 9 VS VS VS VG Yall VS 3NISINOO 10 July 1998 4X6THRU QMS gz NIVO Ve NIVO NIVO NIVO SONV OL 95 0051 Av 3d de 1no 199138 SQNV8 01 0061 Ve Ve ve ve LINO ve 199198 OL sasu 0051 ar AV ar 1 9 199138 OL 9 0061 AV 13G LNO 19313S 0L 995 QOEL as LNO 8s 19313S SQNV8 OL 0061 VS VS VS VS LNO VS 19313S NI NI NI Standard QuickMAPs 3 2W QMS MOT MOT vs LNO
15. 2 TXD TXD 4 2 4 4 DTR DTR 3 SG SG 3 7 3 5 CTS CTS 1 5 Figure 2 14 RJ 45 to DB 25 1 8 Figure 2 15 RJ 45 to DB 9 The serial port selector switch should be set in the up position If the PC s COM port is a DB 25 connector wire the cable according to Figure 2 14 If the PC s COM port is a DB 9 connector wire the cable according to Figure 2 15 No RFI choke is needed See Figure 2 16 and Table 2 1 for more information Connections Over 50 Feet The EIA specifications for RS 232 communications allow for connections up to 50 feet For longer connections the RS 232 signals must be converted to a standard such as RS 485 that is tolerant of long distances The converter on the PC end of the connection can be PC powered but the converter at the ISP 100 end of the connection must have its own power supply Before buying converters please contact TELEX Communications Inc for an application note on this topic Setup amp Installation RJ 45 DB 9 DB 25 Pin Pin Pin Signal Name Direction 7 8 5 Clear To Send CTS To PC 1 1 8 Data Carrier Detect DCD ToPC 6 6 Data Set Ready DSR To PC 8 4 20 Data Terminal Ready DTR From PC 5 2 3 Receive Data RXD To PC 2 7 4 Request To Send RTS From PC 9 22 Ring Indicator RI To PC
16. 4 5 Systemi THD N M 4 5 MIM 1 amp MIM 2 Analog Input Ee ER 4 6 PONOT a REN EOM 4 6 4 6 S 4 6 MEER HP 4 6 MOM 1 Analog Output 4 7 20 77 sere CER 4 7 de D TUO 4 7 4 7 NOIES 4 7 MDM 1 AES EBU Digital WO 4 8 xov 4 8 Performance Sample Rate Converter Engaged 4 8 Performance Sample Rate Converter Bypassed 4 9 Miscellaneous 4 9 4 10 Mm MM EU 4 10 aon T 4 10 Width ects eae see ed nee 4 10 Depth m 4 10 mE CE PE 4 10 Included Accessories eniin eene enn ne a
17. 8 22 61 AER 8 22 8 22 Fine F or Coarse C Control 8 23 Polarity 47 mm 8 23 ngu mee E ae ec A E 8 23 c 8 24 Attenuation and Polarity A DR En EE 8 24 ij KC 8 24 1211 18 ele eee ere 8 24 Fine or Coarse C Control sess 8 25 Polarity OTM 8 25 Mute Control M 8 25 poa edi eec idee a ucc eie 8 25 Delay M 8 26 Setting Delay MM TH 8 26 Fine F or Coarse CON Pa cand 8 26 Bypass Gonirel e actione irf ee eee E ede ee 8 26 p e PH 8 27 Po 8 27 Dither Signal CharaeleriSlieS cede 8 32 5 RM C IQ 8 28 Dither Bit Level 8 28 10 July 1998 Table of Contents Bypass Control mast 8 28 X C 8 29 Filter Bands M RO Too 8 29
18. VS VS VS 3NISINOO NI Standard QuickMAPs 2X8THRU QMS NIVO YL gc LNO SIONVa oesu 006 lt 92 gc 9 Av 13a dz LNO 006 e MALIN AV 13d Ve LNO alld 21034135 ge LNO 006 8 WaHLIGQ ge salia ge Av 13d de 102 ve LNO 50 006 We We We ve Ve INO 3114 193138 av LNO 006 lt ar YILINI uaria gr Av 13d gv 119 Yr LNO 006 5 V Vi 33414 Vr AV 13 Vi LND v alid 1od1l3S gs LNO 5 006 g8 99 Y31114 Av 13a gs LNO LNO SONVar 006 SINVH8 rl VS VS H3LIATI SEPTA vs AV THG Yal 91991385 10 July 1998 4CHAN QMS ge LNO
19. 8 SONVd al We Ve AVM arid HOSS3HdWOO al 1231358 9esu 006 9 ar gr gr Y3 LOLZ 3NISNOO 99 006 SINVa S V YS LINN AV 130 Vb YI 006 8 9 gs Av 13d gs 9 006 8 v vL VS H3H LIG VS vs AV 13d 9 SAMS HOSS3HdWOO 1903 13S al NIVO YL NIYO Standard QuickMAPs 2 2W FR OMS dr LNO E Tin S vv LNO P TNI S as LNO vs LNO 0051 8 de Avada ge 0061 8 SQNV8 2 ve Av 13d daria HOSS3HdWOo g 1293138 0061 S NVa av ar Av dari av 109 8 008 SONVd Vr Av 13d Vb vr 1 9 sasu 0061 8 Y3JHLIA Av 13d 43114 0061 Sanya 8 SINV Z Av 13d 9 HOSSHHdWOO 10313S al
20. Rotating Red LED LEDs Light Yellow When Power Is Applied Factory initialization mode Initiated by holding in the paper clip switch located under the security panel while turning on the unit Memory is in the same state as it was when the unit was turned off LEDs Light Red When Power is Applied Memory is clear This results from a factory initialization COMM Slot 4 and Slot 5 LEDs Blink Red An unrecoverable hardware error has occurred Contact tech support Table 3 1 LED diagnostic messages The ISP 100 was designed with built in diagnostics that activate when power is applied to the unit During the power up cycle the ISP 100 performs several self checks The ISP 100 also will report problems as they happen while the unit is running The diagnostic messages are communicated through the front panel LEDs Refer to Table 3 1 for a list of common LED conditions and corresponding diagnostic messages Factory Default Mode A yellow host LED indicates factory default mode This mode usually results from either an OS update or memory erasure When in this mode a default QuickMAP and QuickSET are loaded that prevents the unit from passing damaging signals The QuickMAP configures the ISP 100 as a straight through processor with high pass filters on the outputs The corner frequencies of the high pass filters are set to 20 kHz To enter factory default mode hold in the default switch see Figure 2 1 item
21. FOR HANDLING inside the opening Push the module into the unit until you feel resistance See Figures 2 4 and 2 5 7 Firmly push on the module s faceplate to seat the module 8 Replace the screws that were removed in step 3 9 Turn on the ISP 100 and verify that the slot indicator for the module is either solid green or blinking green If the slot indicator is not solid green or blinking green then there is a problem with the current hardware and or software Please refer to the Troubleshooting section to identify the problem Figure 2 5 Card insert detail Setup amp Installation Cable Diagrams Analog Audio MIM 1 MIM 2 MOM 1 ANALOG AUDIO SOURCE ISP 100 BALANCED LINE LEVEL SOURCE UNBALANCED LINE LEVEL SOURCE XLR MALE Figure 2 6 Analog inputs Balanced Input from Balanced Output Connect the positive side of the line to pin 2 of the male 3 pin XLR connector and the negative side of the line to pin 3 of the connector In keeping with standard wiring practices the shield should not be connected at this end it should only be connected to pin 1 of the 3 pin female XLR connector or ground of the source end See Figure 2 6 for more information Balanced Input from Unbalanced Output Connect the hot wire to pin 2 of the 3 pin male XLR connector and the shield wire to pin 1 of the connector To avoid a 6 dB drop in level connect pin 3 to pin 1 of the connector See Figure
22. 4 1 DINT 5 4 1 CIEL UEM 4 1 Cru ERU 4 1 4 2 4 2 10 July 1998 5 LOW ase PING 4 2 PAM AGS FIEF 4 2 PUP ASS Filte ecrane a 4 2 IW TS I Matas 4 2 HighShelt EE 4 2 Notch I M BE sre ig rca 4 2 6 4 3 DIU e 4 3 e T 4 3 UT ts recs phased 4 3 ISP 10D Component PIOUS 4 3 Sree 4 3 Mr cM E ER 4 3 Cc C 4 4 Linkwitz Riley 3 way Crossover eL 4 4 NAS eee eres acre a a teat aa 4 4 Parametric Equalizer Filter o 4 4 P aked IGMP ASS Filter 22 4 4 Shelving FIOI 4 4 T m 4 5 System Frequency Response 4 5 System NOISE
23. Center Frequency The center frequency is the frequency at which the maximum boost or cut takes place In the ISP 100 EQ filters the center frequency is continuously variable from 20 Hz to 20 kHz Bandwidth Bandwidth can be The bandwidth is measured at the points on either side of the BE center frequency where the boost is 3 dB less than the displayed in terms maximum boost or the cut is 3 dB less than the maximum cut of Q or octave i whichever is appropriate In the ISP 100 filters bandwidth can fraction See page ad be expressed in either octave fraction fractions of an octave or 7 3 for information et on changing the way number of octaves if the bandwidth is greater than a full octave filter bandwidth is or quality Q displayed p ay The conversions between octave fraction and Q are 1 1 octave fraction 24log 4 1 Q Q and 1 Q octave fraction octave fraction 2 2 2 2 10 1 c o o gt o 0 1 0 01 0 1 1 10 100 Figure 8 15 Octave Fraction vs relationship The relationship between octave fraction and Q is shown in Figure 8 15 Processing Components Filter In the ISP 100 EQ filters the bandwidth is continuously variable from 1 12 octave to 3 octaves which tr
24. 108 108 L 114 E 114 E t 420 1 120 1 426 4 126 1 132 182 T n T Wm E 11111010 000 138 126 114 102 90 84 78 72 66 60 54 48 42 36 30 24 18 12 6 0 138 126 114 102 90 84 78 72 66 60 54 48 42 36 30 24 18 12 6 0 dBFS dBFS AP is a trademark of AudioPrecision Inc Specifications
25. Installing VUE IT THIS PAGE LEFT BLANK INTENTIONALLY GETTING STARTED Starting VUE IT for MERLIN ISP 100 1 lal xl File Edit Tools Options Window Help 212181 Figure 6 1 VUE IT workspace When VUE IT is started you will see a screen similar to the one in Figure 6 1 The window displayed in Figure 6 1 is the basic environment in which all interactions with VUE IT take place There are six key features of this window that users should be aware of 1 Menu Bar This is where the user will find features that are either integral to VUE IT or standard in windows When you see a reference a command located under a menu this is where you should look Below the menu names are short cut buttons that provide access to common commands via a single mouse click The buttons are from left to right New Project Open Project Save Project Revert Scan Project Manager Help and Exit 2 Work Space This is where the QuickMAP Project Manager QuickSET Manager and component boxes appear This is the main work area for the user 3 General Help This box displays helpful messages about commands and functions 4 Component Parameter Type This box displays the name of the component or parameter selected 5 Component Parameter Input Range This box displays the input value range for a component or parameter 6 Online Offline Status This box displays the status of the connection b
26. Mutes Linked Left and Right input mute selectable via SPI control linked Left and Right output mute selectable via Serial Data Interface Synchronous Sampling Unless otherwise noted SPI control TBD Multiple outputs may be synchronized via DPDB signal on connector MDM 1 transmitter is slaved to MCLK WST and SCKT signals MDM 1 receiver may be configured as Master to generate MCLK via AES CLK WSR and SCKR signals derived from input data stream or as Slave to receive WSR and SCKR signals from card edge connector either with or without the Sample Rate Converter With sample rate converter engaged the MDM 1 cannot be configured as the master Signal measurements are at unity gain 16 dBu and 20 Hz to 20 kHz bandwidth Power measurements are quiescent Operating temperature with non condensing humidity Specifications EE Notes Per Analog Devices AD1890 data sheet where applicable With 6 144 MHz MCLK 2 input 20 Hz to 20 kHz full scale input through sample rate converter to output via passthrough From input through sample rate converter to output via passthrough When installed in ISP 100 When installed in ISP 100 Input samples longer than 20 bits are truncated to 20 bits Least four significant bits are zero filled 0 20 kHz input through sample rate converter to output via passthrough 20 Hz to 20 kHz 60 dB input through sample rate converter to output p
27. SQNV 0L VS VG vs Av 13d WS Yala NIVO Standard QuickMAPs 2_3WAY QMS 006 de dal 006 OL al YLIN AYME 199138 006 ar Av 13 ar ysis 006 SANV4 Vb Vb H3LIATT Vb Vy 006 OL Vi gS as gs Av 13d gs sail L ANNE VL 199135 006 c VG 9 Av 13d WS 10 July 1998 2 2W 50 5 ar 100 3ONVM 1104 lt vr 1 lt 1no HOIH LNO lt 006 8 YILIN de 006
28. ctetu bnt n m unl tI dau scs 8 3 TT LL 8 4 Controls 8 4 8 6 Luizipom 8 8 Notes on Operation of the 8 8 8 9 ina m 8 9 Attack Window Release and Crest Factor Controls 8 9 Fine F or Coarse C Control 88898838 57777977 neren nnet 8 10 Knee Control Me 8 10 Ratio 001025 c 8 10 ele ze RI 8 10 Bypass Control master E ou ME LEM dud 8 10 8 11 TWO Way cat Tc 8 11 Three Way 8 13 Four Way Crossovers M Rn 8 17 Sum to Allpass Characteristics of Linkwitz Riley Crossovers 8 20 Low Low Mid Mid Mid High and High Controls 8 21 NEU Song 8 21 joo 8 21 GIASS
29. 2 MES Loading the Software Leaving programe 1 Close all programs before beginning installation running while trying to install VUE IT 2 Insert the disk labeled VUE IT FOR THE ISP 100 into your 3 5 inch could cause floppy drive problems 3 Windows 95 users should click on the Start button and select Run 4 Windows 3 1x users should click on File and select Run 5 Type A setup exe Substitute the appropriate drive letter for your system 6 Click on the OK button and follow the instructions as they appear on the screen 7 Reboot the computer Installing VUE IT EN h Updating the ISP 100 s Operating System Ver 2 03 of the ISP 100 05 and ver 2 11 of the DSP code was found VUE T requires ver 2 05 of the ISP 100 05 and ver 2 11 of the DSP code be installed on the target device Please refer to the user s manual for instructions on how to download an Operating System to an ISP 100 Figure 5 1 OS mismatch dialog OS Download xc T The attached ISP 100 has requested an 05 download r Do you wish to download now Figure 5 2 OS download request dialog The updating of the operating system contained in the ISP 100 s flash memory is usually required after loading a new version of VUE IT on the computer A dialog box such as those in Figures 5 1 and 5 2 usually indicates this The procedure is as follows 1 Make sure both the computer and the ISP 100 are bo
30. 4 order Butterworth 6 dB octave 1 Butterworth 12 dB octave 2 9 Butterworth 18 dB octave 39 Butterworth 24 dB octave 4 order Linkwitz Riley Butterworth Squared 12 dB octave 2 9 Linkwitz Riley Butterworth Squared 24 dB octave 4 In addition the cutoff frequency attenuation and polarity in the low band and the high band may be independently adjusted and the filters in either band may be bypassed entirely The cutoff frequency in each filter is continuously variable from 20 Hz to 20 kHz The attenuation in each band is continuously variable from 96 dB to 0 dB plus mute The polarity in each band is selectable as or in phase or out of phase Each band may be bypassed in which case all of the crossover filters in that band will be bypassed while the crossover filters in the other band will not be affected Two Way Bessel and Butterworth Crossovers Bessel crossovers utilize Bessel filters Bessel filters are designed for maximally flat group delay meaning that they have nearly linear phase and excellent transient response Their amplitude response is not as flat and their cutoff is not as sharp as those of Butterworth filters Butterworth crossovers utilize Butterworth filters Butterworth filters are designed for maximally flat amplitude response meaning that the amplitude response in the passband is as flat as possible without ripple Their
31. 6 Outputs 12 05 1997 13 35 51 12 22 1997 09 53 09 15 100 The MondoEq 2 Inputs x 2 Dutputs 12 05 1997 13 35 31 12 22 1997 09 53 00 ler 4 Inputs x6 Outputs 12 30 1997 09 58 21 12 30 1997 10 16 49 QuickMAP sets the 4 4 Inputs x6 Outputs 12 05 1997 13 33 12 12 22 1997 09 52 39 signal paths and 2X8Thru 2 Inputs x 8 Outputs 12 05 1997 13 22 51 12 18 1997 11 40 18 i 4x6Cmbe 4 Inputs x 6 Outputs 12 05 1997 13 32 21 12 22 1997 08 52 20 rocessing from P P 4 217 2 Inputs Outputs 12 05 1997 13 31 23 12 22 1997 09 51 58 input to output An 4Chan 12 05 1997 13 28 98 _ 12 22 1997 09 50 53 ISP 100 can hold one QuickMAP Description QuickMAP ata time Mono Three Way Crossover with full range spur and two independent full range channels OK Figure 7 12 QuickMAP selection dialog QuickMAP Selection see Figure 7 12 is where a project s QuickMAP is chosen It appears when the Build From Script option is selected when setting up a new project Here you will be able to select the script that will be used to create the QuickMAP The QuickMAPs can be sorted by Name I O Configuration Creation Time and Modification Time To sort the QuickMAPs click on the heading button of the property you wish to sort by i e Name I O Using VUE IT EN J h 3 Configuration etc The first click of the mouse will sort the QuickMAPs in ascending order and the second click will sort the
32. 7 5 5 CTS CTS 8 5 8 8 Figure 2 11 DB 9 to DB 25 Figure 2 12 DB 9 to DB 9 The serial port selector switch should be set in the down position If the PC s COM port is a DB 25 connector wire the cable according to Figure 2 11 If the PC s COM port is a DB 9 connector wire the cable according to Figure 2 12 A snap on 10 July 1998 Steward Part No 28B2025 0A0 N gt Not using RFI choke while using the front panel serial port could cause increased interference with other devices and void the FCC compliance RS 232 cable runs over 50 feet could cause unreliable communications It is better to use RS 485 converters for connections over 50 feet Be sure to read the application note on this topic before buying converters Data Units ADIM BDIM CDIM DDIM EDIM FDIM GDIM Z 25MHz Z 100 MHz ohms ohms in 1 280 0 705 0 610 0 362 0 303 0 276 0 138 168 298 mm 31 75 17 91 15 50 9 19 7 70 7 01 3 51 Steward East 36th Street Chattanooga TN 37401 USA Tel 615 867 4100 Fax 615 867 4102 Figure 2 13 choke data choke such as Steward PN 28B2025 0A0 should be used at the ISP 100 end of the cable See Figures 2 13 and 2 16 and Table 2 1 for more information Rear Panel RS 232 ISP 100 PC ISP 100 PC RJ 45 DB 25 Female RJ 45 DB 9 Female DCD DCD 1 8 4 1 RXD RXD 5 5
33. Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted 10 July 1998 Kl Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Using the Filter Tool Right click on the red dot on the active filter band While holding down the right mouse button move the mouse from side to side A display will appear indicating the bandwidth of the filter When the desired level is reached release the right mouse button Using the Magnitude Mag or Phase Control This button allows the user to view the composite filter response in either a magnitude vs frequency or phase vs frequency environment Clicking on the button will toggle the setting Using the Logarithmic Log or Linear Control This button allows the user to view the composite filter response in either a logarithmic or linear environment Clicking on the button will toggle the setting Using the 24 dB 40 dB 120 dB Controls These buttons allow the user to view the composite filter response in three different dynamic ranges
34. MERLIN INTEGRATED SIGNAL PROCESSING ISP 100 INTEGRATED SIGNAL PROCESSOR ISP 100 INTEGRATED SIGNAL PROCESSOR User s Manual THIS PAGE LEFT BLANK INTENTIONALLY PROPRIETARY NOTICE The Merlin product information and design disclosed herein were originated by and are the property of Telex Communications Inc Telex reserves all patent proprietary design manufacturing reproduction use and sales rights thereto and to any article disclosed therein except to the extent rights are expressly granted to others PATENT NOTICE This equipment contains and uses a design for which patent applications have been made Patents Pending COPYRIGHT NOTICE Copyright 1997 98 by Telex communications Inc all rights reserved Reproduction in whole or in part without prior written permission from Telex is prohibited NOTICE TO USER This manual should not be construed as any representation or warranty with respect to the software named herein Occasionally changes or variations exist in the software that are not reflected in the manual Generally if such changes or variations are known to exist and to affect the product significantly a release note or README file accompanies the manual and the distribution disks In that event be sure to read the release note or README file before using the product This publication could include technical inaccuracies or typographical errors Changes are periodically made to the informat
35. degrees dB dB ohms F Specifications EN m MDM 1 AES EBU Digital I O Module Power Symbol Description Minimum Typical Maximum Units VA18P Pos Analog Supply Voltage 17 50 18 00 20 00 Volts VA18M Neg Analog Supply Voltage Not Used Volts VD5P Pos Digital Supply Voltage 4 75 5 00 5 50 Volts 18 Pos Analog Supply Current 8 9 10 mA 18 Neg Analog Supply Current Not Used mA ID5P Pos Digital Supply Current 122 155 168 mA Performance Sample Rate Converter Engaged Symbol Description Minimum Typical Maximum Units Sample Rate for Digital 32 48 gt 54 kHz Input Data THD N Total Harmonic Distortion 0 00002 0 00016 plus Noise RELATIVE IMD Intermodulation Distortion TBD SMPTE 4 1 Jitter in Output Clock 415 ps 700 Hz 100KhZ Tolerable Jitter in Input 90 ns Clock before Loss of Lock Resolution input 4 20 bits Resolution output 24 24 24 bits Frequency Response 0 01 dB Dynamic Range 117 120 dB Noise Floor 117 dBFS Delay through transmitter WST periods Interchannel Phase Deviation 0 Degrees MCLK 2 Sample Rate Converter Reference Clock Source 4 333 6 144 6 667 MHz Master Clock 5 TBD 12 288 TBD MHz WSR Receive Word Clock MCLK 256 Hz WST Transmit Word Clock MCLK 256 Hz SCKR Receive Bit Clock MCLK 4 Hz SCKT Transmit Bit Clock MCLK 4 Hz 10 July 1998 Sample Rate Converter bypassed Symbol Des
36. female XLR connector and the negative side of the line to pin 3 of the connector In keeping with standard wiring practices the shield should be connected at this end it should not be connected to pin 1 of the male 3 pin XLR connector or ground of the receiving end The cable used should be 1100 AES EBU compliant cable such as MOGAMI 3080 See Figure 2 10 for more information SPDIF Output The ISP 100 is not capable of providing SPDIF outputs Serial Communications Serial communications with the ISP 100 can be accomplished either through the DB 9 connector located under the front panel security cover or through the RJ 45 connector located on the rear panel The computer connected to the ISP 100 must have a free COM port When tuning the 1 4 Communications with the ISP 100 will not work properly if the eyetem with a COM port is shared with another device such as TEF M analyzer It computer controled is important to set the serial port selection switch located under the analyzer use a front panel security cover to the serial port used The cable used separate computer should be of low capacitance and suited to data communications for the analyzer Using two PCs will Front Panel RS 232 save time ISP 100 PC ISP 100 PC DB 9 DB 25 Female DB 9 DB 9 Female DCD DCD 1 8 1 1 RXD RXD 2 3 2 2 3 4 pe mcm SG SG 5
37. highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control 10 July 1998 ooo Fine F or Coarse C Control This button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the button will toggle the setting Polarity Control This button determines the polarity of the signal A indicates that the signal will not have it s phase altered A indicates that the signal s phase will be changed 180 Clicking on the button will toggle the setting Mute Control M This button determines if the input signal will be muted A black M indicates that the signal is not muted while a red M indicates that the signal is muted Clicking on the button will toggle the setting Processing Components Crossover Cut Jr X m s Figure 8 11 Cut component The Cut see Figure 8 11 can apply as much as 96 dB attenuation or mute completely and invert polarity 10 July 1998 Attenuation and Polarity Application of attenuation is accomplished by multiplying each data sample by a number whose absolute value lies between 1 0 0 dB and 0 000015625 96 dB Muting is accomplis
38. then the filter band is bypassed Bypass Control master This button determines if the component is in the processing chain If the LED on the button is gray then the component is inserted into the signal processing chain If the LED is red then the component is bypassed in the signal processing chain A bypassed component will be colored red in the QuickMAP Frequency in Hz The center frequency of a filter can be adjusted three ways Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the Processing Components Filter J text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Using the Filter Tool Click on the triangle associated with the filter band that needs its center frequency adjusted While holding the mouse button down drag the mouse from side to side A display indicating the current center frequency will appear Wh
39. 2 6 for more information ANALOG ISP 100 AUDIO DESTINATION BALANCED LINE LEVEL LOAD UNBALANCED LINE LEVEL LOAD XLR FEMALE Figure 2 7 Analog outputs Balanced Output to Balanced Input Connect the positive side of the line to pin 2 of the 3 pin female XLR connector and the negative side of the line to pin 3 of the connector In keeping with standard wiring practices the shield should be connected at this end it should not be connected to pin 1 of the male 3 pin XLR connector or ground of the load end See Figure 2 7 for more information 10 July 1998 Using low cost connectors can save money in the short term but failures could cost more Confused about what type of cable to use Try Belden 2451 or 6725 Both are good quality and inexpensive o Use the white block oh the 10 module panele to write a refere ce number or other designator on by uei ga permanent marker Then make identical labels for the into t bles that plug e module Long unbalanced cable rune analog or digital are not recom mended Balanced Output to Unbalanced Input Connect the hot wire to pin 2 of the 3 pin female XLR connector and the shield wire to pin 1 of the connector To avoid a 6 dB drop in level connect pin 3 to pin 1 of the connector See Figure 2 7 for more information Digital Audio MDM 1 Cards DIGITAL AUDIO SOURCE ISP 100 AES EBU DIGI
40. 3 amp 6 5 7 Signal Ground SG N A ie 4 3 2 Transmit Data TXD From PC Not Implemented common to computer controlled devices Table 2 1 and Figure 2 16 can help you decipher the 5 252 interfaces of many devices Table 2 1 RS 232 signal pinouts for RJ 45 DB 9 and DB 25 connectors o2mco 000000000000 ELI O22422 ok Solder Side View Solder Side View DB 25 Female DB 25 Male O O 1 64 9 74 8 84 4 7 2 9 5 6 O Solder Side View Solder Side View DB 9 Female DB 9 Male 87654321 Front View RJ 45 Figure 2 16 Connector pinouts 10 July 1998 o General Purpose Inputs 9 PIN PHOENIX 1 121314 1516171819 permanent contact cloeure ie lt Pay used the ISP 100 COMMON will remember the QuickSET selected Figure 2 17 connector pinout even if the AC power aile Dry i e switch or electronic i e open collector contact closure should be sufficient The closure can be either momentary 10 ms minimum duration or continuous Connect the desired input 1 8 through the contact closure to common 9 See Figure 2 17 for more information Master Sync Input BNC MALE RG 58 U NA VA eA Figure 2 1
41. A gate monitors the level of the input signal and controls the level of the output signal accordingly When the average input signal level increases from below threshold to above a gate opens removes all attenuation so that the output signal level matches the input signal level Desirable sound effects can sometimes be created if a gate is forced to ramp the output signal level to its new value gradually rather than instantaneously The Opening Time control adjusts the duration of this ramp Opening Time is adjustable in the range 20 uSec one sample to 50 mSec 10 July 1998 ooo Closing Time A gate monitors the level of the input signal and controls the level of the output signal accordingly When the average input signal level decreases from above threshold to below a gate closes applies attenuation so that the output signal level is less than the input signal level A gate generally sounds better if it is forced to ramp the output signal level to its new value gradually rather than instantaneously The Closing Time control adjusts the duration of this ramp Closing Time is adjustable in the range 20 one sample to 5 Sec Key Channel There are situations in which gating is applied to one channel based upon the level in another channel This might be used in a stereo signal pair to prevent image shift one of the channels would be considered to be the level reference and the gates in both channels would be set up
42. E D 12 3 Low Low Mid Mid Mid High and High Controls The Low Low Mid Mid Mid High and High buttons determine if that section of the crossover is bypassed If the word Low Low Mid Mid Mid High or High is displayed on the button then that portion of the crossover is not bypassed If the word Bypassed is displayed on the button s face then that portion of the crossover is bypassed Clicking on the buttons will toggle their settings Link Unlink Control The Link Unlink button determines if the settings in the crossover track their corresponding partners A simple rule of thumb is that when the sections are linked the component on the right will track its partner on the left Clicking on the button s will toggle the settings Slope To change settings click on the arrow next to the number in the text box A selection list will appear The list may or may not be scrollable To make a selection click on the desired entry Processing Components Crossover Class To change settings click on the arrow next to the number in the text box A selection list will appear The list may or may not be scrollable To make a selection click on the desired entry Cutoff Frequency The Cutoff Frequency can be adjusted three ways Using the Knob Click on the indicator on the knob and while continuing to hold down the mouse button move the mouse in an arc The numbers in the box below the knob will
43. Master ATEN AION 8 40 Fine FF Or Coarse C COMMON 8 40 Polarity Control 8 40 Mute lg 2 Me eater rT ee ere mere ee 8 40 Pre Fader Metering nennen nnne nnne 8 40 c 8 42 Familiar 8 42 8 43 uuu om 8 44 Notes en Operation of the 8 44 uiu o om 8 44 Attenuation and Threshold Controls iui eant bti rad 8 44 Open Window and Close Controls 8 45 SEIEN ET TO TES 8 45 Fine F or Goarse 8 45 Bypass Control 8 45 RR Um es 8 46 General Information Table of Contents Familiar Controls 8 46 rrt Yee dee eser 8 48 Notes on Operation of the 8 49 IGS TEE 8 50 Threshold 8 50 Attack Window Release and Crest Factor Controls 8 51 Fine F or Coarse C Control 1 cnet nte ntn
44. NIVO 8I NIYO de LNO 006 sanya 8 8 Av 13d 8 ve LNO 006 8 Ve ve Av 13d AYME 103135 8r 1no 006 Sanya 8 Aviad vv LNO 006 8 d Vb Yt AV 13d Ve 119 as LNO 006 0L as Av 13d 1no gs 199135 LNO 006 OL i VS vs Av 13d 9 1n9 103135 VI NIVO Standard QuickMAPs Copyright 1997 98 TELEX Communications Inc All Rights Reserved Printed in USA MERLIN INTEGRATED SIGNAL PROCESSING A Division of TELEX Communications Inc 9600 Aldrich Avenue South Minneapolis MN 49107 USA 7 98 Ph 612 884 4051 Fax 612 887 5588 P N 38109 744 Rev A
45. NIVO NIVO 10 July 1998 2 2W 25 5 gv ino Tid 1104 gs 1no vs LNO 006 ge ae Av 13a Mall f 985 006 8 AN 13d ve 103148 006 Z YILINI ar Av T3 LNO Vc 199195 006 2 Vi Vi Vv AV 130 LINO 1991938 985 006 as AV1ad as sasu 006 8 WS VS Av 13a VG 9 2 Vb VL 19313S az NI NIVO YZ NI YZ NIVO lt aL NI NIVO E VI NI YL NIVO E Standard QuickMAPs 4 2WAYS QMS HOIH 91 NIVO 006 az az YS LINN az Av 13d az 006 H3LIATT ANNCC 21041885 006
46. a total of four inputs in terms of hardware Selecting the Input To select the input click on the button next to the input that you want to make active The LED on the button should turn from gray to green If a particular button is grayed out then it is not available for selection 10 July 1998 GLOSSARY Ato D Amplitude factor Attack Attack time Attenuate Attenuation characteristic Attenuation constant Attenuator Audibility Audible Boost Clipper Clipping Compress Compression Compression ratio Compressor Crest factor Analog to Digital Conversion of an analog signal to a digital representation See CREST FACTOR The rise of a musical note from zero to full volume The time required for an applied signal that suddenly increases in amplitude to reach 1 1 e that is 63 2 of its final stable value To reduce in amplitude The decrease of signal amplitude versus frequency It is usually expressed in decibels per octave See ATTENUATION CHARACTERISITIC A device for reducing signal amplitude in precise predetermined steps or smoothly over a continuous range The quality of being able to be heard In a healthy listener the threshold of audibility is extremely low at the threshold the pressure of a sound wave varies from normal by approximately 10 pascals The frequency range of human audibility extends roughly from 20 Hz to 20 kHz Hear or capable of being heard To inc
47. and while continuing to hold down the mouse button move the mouse up and down The numbers in the box below the slider will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Attack Window Release and Crest factor controls All of these controls can be adjusted in three ways Using the Knob Click on the indicator on the knob and while continuing to hold down the mouse button move the mouse in an arc The numbers in the box below the knob will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pre
48. based upon RMS Root Mean Square calculations and the other is based upon Absolute Value calculations Each of these methods produces a slightly different value for signal level and the difference depends upon the characteristics of the signal itself The ISP 100 compressor uses Absolute Value for its computation of signal level so the level reported by the compressor may differ slightly from the RMS value expected for a given signal Crest Factor Sensitivity and Sinewaves The peak level of a pure sinewave tone is 1 414 times its average level The ISP 100 compressor will therefore apply approximately 3 dB more compression to a pure sinewave signal when the Crest Factor Sensitivity is set to 1 00 peak responding than when it is set to 0 00 average responding This represents normal operation for the compressor Sidechaining When the sidechain input to an ISP 100 compressor is selected to be a channel other than its input the compressor controls must still be set The sidechain selects only the channel s data 10 July 1998 ooo not its compressor control settings If multiple compressors utilize the same channel as their sidechain sources then all controls on all compressors must still be configured Meter The meter located at the left of the component indicates the amount of attenuation taking place in dB Threshold The Threshold can be adjusted three ways Using the Slider Click on the indicator on the slider
49. button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the button will toggle the setting Polarity Control This button determines the polarity of the signal A indicates that the signal will not have it s phase altered A indicates that the signal s phase will be changed 180 Clicking on the button will toggle the setting Mute Control M This button determines if the input signal will be muted A black M indicates that the signal is not muted while a red M indicates that the signal is muted Clicking on the button will toggle the setting Bypass Control master This button determines if the component is in the processing chain If the LED on the button is gray then the component is inserted into the signal processing chain If the LED is red then the component is bypassed in the signal processing chain A bypassed component will be colored red in the QuickMAP Processing Components Cut Delay Delay 2 Delay in Ms Five Delay 900 Figure 8 12 Delay component Delay see Figure 8 12 is used to compensate for differences in the physical alignment of loudspeakers or loudspeaker drivers In the ISP 100 the delay in each output channel is adjustable in the range 0 2 500 milliseconds depending on QuickMAP used in 20 833 microsecond single sample increments T
50. identically The Key Channel selection indicates the channel whose level is to be used to control the gate If the input channel is to control itself then it should be selected as the Key Channel Otherwise the appropriate other channel should be selected from the set of available Key Channels in the menu Unfamiliar Controls There are two controls on the ISP 100 gate that are not available in traditional noise gates These controls provide much greater flexibility and utility to this gate than can be achieved with traditional gates Gated Attenuation The gated attenuation is the amount of attenuation that is applied to a signal whose average level falls below the selected threshold Most traditional noise gates use a fixed attenuation or simply mute the channel completely The ISP 100 gate provides for operator control of the gated attenuation Gated Attenuation is adjustable in the range 100 dB to 0 dB Detection Window The detection window is the period of time over which the gate computes the average signal level Every noise gate that operates upon average signal level uses a detection window In traditional gates this window is of fixed length and the operator may not even be aware of that length The ISP 100 gate provides for operator control of the length of the detection window Very dynamic signals and signals containing a lot of high frequency energy require shorter detection windows Non dynamic signals and signals con
51. in Active Realization of Multiway All Pass Crossover Systems by Joseph A D Appolito Journal of the Audio Engineering Society Volume 35 Number 4 April 1987 A 3 way Linkwitz Riley crossover is essentially a combination of two 2 way Linkwitz Riley crossovers This means that the polarity requirements associated with a 2 way Linkwitz Riley crossover carry over to a 3 way crossover A properly implemented 2 way 12 dB octave Linkwitz Riley crossover is characterized by 2 order Linkwitz Riley Butterworth Squared lowpass filter 6 dB magnitude response at crossover frequency e 219 Linkwitz Riley Butterworth Squared highpass filter 6 dB magnitude response at crossover frequency polarity of highpass band opposite that of lowpass band In a 3 way crossover the bands associate in non obvious ways see Sum to Allpass Characteristics of Linkwitz Riley Crossovers and the polarity reference for the high band is unexpectedly the low band rather than the adjacent mid band Thus if a 12 dB octave filter is used for LP and then the mid band must be out of phase with the low band If a 12 dB octave filter is used for LP and HP then the high band must be out of phase with the low band not the mid band A properly implemented 2 way 24 dB octave Linkwitz Riley crossover is characterized by e 4 order Linkwitz Riley Butterworth Squared lowpass filter 6 dB magnitude response at crossover frequency 4
52. in the Project Manager and then clicking on the Properties button will open the General Purpose Interface see Figure 7 18 From this panel you can configure the GPI input pins Configuring Input Pins Each input pin can be assigned a command by clicking on the button to the right of the entry for that pin see Figure 7 18 A pop up menu Using VUE IT h will appear and the proper command can be selected from the list by clicking on it The list displays the following options Empty No command assigned to input pin Mute Combo The initial contact closure causes the outputs to mute The subsequent contact closure causes the output to un mute Mute Enable Contact closure causes the outputs to mute Mute Disable Contact closure causes the outputs to un mute QuickSET Increment Contact closure causes the next QuickSET stored in memory to be loaded into the QuickMAP QuickSET Decrement Contact closure causes the previous QuickSET stored in memory to be loaded into the QuickMAP QuickSET Select Contact closure causes the specified QuickSET to be loaded into the QuickMAP Testing the GPI Assignments Input Pins a x3 Empty Empty Empty Empty Empty Empty Empty Empty Figure 7 19 panel If you click on the GPI entry and then click on the Design button you will see a panel like the one in Figure 7 19 The panel in Figure 7 19 will allow you to sim
53. order Linkwitz Riley Butterworth Squared highpass filter 6 dB magnitude response at crossover frequency polarity of high band the same as that of low band In a 3 way crossover the bands associate in non obvious ways see Sum to Allpass Characteristics of Linkwitz riley Crossovers and the polarity reference for the high band is unexpectedly the low band rather than the adjacent mid band Thus if a 24 dB octave filter is used for LP and then the mid band must be in phase with the low band If a 24 dB octave filter is used for LP and then the high band must be the in phase with the low band not the mid band 10 July 1998 Four Way Crossovers mid high input low mid Figure 8 8 Four way crossover implementation In the ISP 100 4 way crossovers are implemented as shown in Figure 8 8 This parallel structure was selected over the more common binary tree structure for its suitability to the distribution of filters among multiple DSPs The parallel structure is also capable of perfect implementation of Linkwitz Riley crossovers for which the ISP 100 has been optimized The filters marked optional in Figure 8 8 will be explained in the Linkwitz Riley Crossover section The lowpass filters LP except for the optional LP and the highpass filters HP except for the optional may each be independently configured as Bessel 6 dB octave 1 order Bessel 12 dB octave 2 9 Bessel 1
54. progra 1 vue itNisp T1 ONcomplib Group Name Component Description filter2 Filters DTS 640 Figure 7 15 Component export dialog To export component settings from the Project Manager click on the desired component entry in the Project Manager see figure 7 9 and then click on the Export button You will then see a dialog box like the one in Figure 7 15 The Export Component dialog displays currently existing component presets filenames in the lower left corner of the dialog These files can be sorted by clicking on the Name Type and Group heading buttons The first mouse click on one of these buttons will sort the list in ascending order and the second click will sort the list in descending order The Export Component dialog requires you to supply a name for both the component settings and the group to which it is assigned In addition to these entries you are also allowed to provide a brief description of the settings Once the component name group and description have been entered click on the OK button Clicking on the OK button causes the program to create a file holding the component settings and description in the COMPLIB directory The full path to the COMPLIB directory is assigned when you first installed VUE IT See the System Configurations entry for information on changing the COMPLIB directory s path Using VUE IT 1 Component Import Import Component Te
55. selects the RJ 45 port located on the rear of the unit 5 Battery Provides memory backup power The expected life is approximately four years 6 Default Switch Used to place unit in OS download request mode 7 Fuse Protects the power supply 8 Power Turns the unit on and off Placing the switch in the down position turns the unit on Placing the switch in the up position turns the unit off Setup amp Installation Rear Panel Features see Figure 2 2 E on P Figure 2 2 ISP 100 rear panel features AC Power Connects to mains via an IEC type AC power cord RS 232 Port Links the PC to the unit via a RJ 45 connector External Sync Precision frequency reference input to the unit GPI Provides a General Purpose Interface for the user The user provides inputs to the system via dry or electronic contact closure inputs These inputs can be used to change system settings directly and or scroll through various settings 5 Output Slot 5 Accepts either an analog output module or digital module 6 Output Slot 4 Accepts either an analog output module or digital module 7 Output Slot 3 Accepts either an analog output module or digital module 8 Input Output Slot 2 Accepts an analog input module analog output module or digital module 9 Input Slot 1 Accepts either an analog input module or digital module Power Requirements
56. some very specific amplitude and spectral characteristics is added to the original signal before truncation then the correlation is destroyed and the error signal sounds like low level noise instead of tones Even though the added noise actually raises the noise floor in the final low resolution signal it sounds better because human hearing finds low level broadband noise to be much less objectionable than spurious tones This addition of noise before truncation is called dithering The noise that is added is called the dither signal In summary dithering is a way of making digital audio better by making it worse Bit Level In the ISP 100 the bit level of the dither signal is selectable as whole Processing Components Dither 8 28 numbers between 16 and 24 bits inclusive The bit level of the dither signal should be set to the bit resolution of the destination for the data The resulting dither signal will have an amplitude equal to 1 0 quantization level peak to peak at the selected Bit Level Using the examples the bit level for the dither signal should be set to 20 bits when the data are destined for the 20 bit D A converters and to 16 bits when the data are destined for the DAT recorder Dither Signal Characteristics The dither signal used in the ISP 100 has a highpass spectral shape for reduced audibility It is characterized by approximately a 6 dB octave slope in the audio band The dither signal used in the ISP
57. than 1 0 When the signal is not being limited the meter indicates 0 dB gain of 1 0 Meter values are raw no averaging or ballistics are applied Notes on Operation of the Limiter Bypass Bypassing a limiter causes the signal to pass through unaltered Overshoot The limiter algorithm used in the ISP 100 allows for a small amount of overshoot on transients regardless of the settings of the Detection Window and Crest Factor Sensitivity controls The amount of overshoot is somewhat dependent upon the setting of the Threshold control the lower the threshold the greater the overshoot This represents normal operation for the limiter Processing Components Limiter Computation of Average Level There are two common methods of computing average signal level one is based upon RMS Root Mean Square calculations and the other is based upon Absolute Value calculations Each of these methods produces a slightly different value for signal level and the difference depends upon the characteristics of the signal itself The ISP 100 limiter uses Absolute Value for its computation of signal level so the level reported by the limiter may differ slightly from the RMS value expected for a given signal Crest Factor Sensitivity and Sinewaves The peak level of a pure sinewave tone is 1 414 times its average level The ISP 100 limiter will therefore apply approximately 3 dB more limiting to a pure sinewave signal
58. the components in a OK button QuickMAP Multiple s Deleting QuickSETs add b If atleast two QuickSETs exist the user can delete an inactive one by 2 clicking on the Delete button selecting the QuickSET from the list QuickSETs can be and then clicking on the OK button Selecting the Active QuickSET The user can select a QuickSET from the list of available QuickSETs a QuickSET to a GPI input When that input receives a contact closure the by clicking on the arrow next to the Active QuickSET entry and selecting the desired QuickSET from the list Updating a QuickSET Hi change The user can use the Update button to save changes to a QuickSET pend nias that has already been created Using Update overwrites the SR M ed information previously saved in the selected QuickSET contained in the QuickSET assigned to the GPI pin Discarding Changes The Revert button allows the user to make changes to a QuickSET and then go back to the original settings This button only works when changes have been made and the Update button has not been used for GPI EISE j E Please configure the available General Purpose Input pins for a the connected ISP 100 Pin ssignment Pin 1 Pin 5 Empty Ed Pin2 Empty Pin 6 Empty Pin 3 Empty Pin 7 Pin 4 Empty Pin Figure 7 18 properties dialog Clicking on the GPI entry
59. user would need This was done in order to satisfy the advanced user who feels a need to understand the inner workings of the component References to specific journal articles and other supplementary sources are provided for further reading An explanation of how to manipulate the various controls follows the component explanation In many instances a specific parameter may have multiple means of adjustment An example of this would be the gain control in the Gain component A user accustomed to traditional hardware would probably prefer the virtual faders and knobs whereas a user accustomed to computers and exact entries would probably prefer the text box where the amount of gain or attenuation can be directly entered Processing Components EN A h 1 Combine Combine 4B Figure 8 1 2 to 1 combine component The Combine component see Figure 8 1 adds multiple input signals together and sends the sum to a single output In QuickMAPs 2 to 1 3 to 1 and 4 to 1 combines may exist The combine s default attenuation is set so that the combine s output level is unity In every case the attenuation applied to each input channel may be independently adjusted between 96 dB and 0 dB or muted and the polarity applied to each input channel may be independently set to or in phase or out of phase Attenuation and polarity are applied to the input signals before they are added to the combination Bypa
60. when the Crest Factor Sensitivity is set to 1 00 peak responding than when it is set to 0 00 average responding This represents normal operation for the limiter Sidechaining When the sidechain source for an ISP 100 limiter is selected to be a channel other than its own input the limiter controls must still be set The sidechain selects only the channel s data not its limiter control settings If multiple limiters utilize the same channel as their sidechain sources then all controls on all limiters must still be configured Meter The meter located at the left of the component indicates the amount of attenuation taking place in dB Threshold The Threshold can be adjusted three ways Using the Slider Click on the indicator on the slider and while continuing to hold down the mouse button move the mouse up and down The numbers in the box below the slider will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arro
61. 100 has a triangular probability density function TPDF for the minimization of noise modulation effects Bypass Bypassing dither results in no dither whatsoever being added to the signal This is different than setting the dither to the 24th bit level Dither Bit Level To change settings click on the arrow next to the number in the text box A selection list will appear The list may or may not be scrollable To make a selection click on the desired entry Bypass Control master This button determines if the component is in the processing chain If the LED on the button is gray then the component is inserted into the signal processing chain If the LED is red then the component is bypassed in the signal processing chain A bypassed component will be colored red in the QuickMAP 10 July 1998 Filter IT Active Band Band 1 Freq in Hz 20 0 Boost Cut 00 Bandwidth a fi 0 Filter Type z NET ee meee Bypass 20 50 100 200 5K 20K sus tee 0 8 t Figure 8 14 Filter component The filter component Filters see Figure 8 14 are used to modify the spectral balance can be used to frequency content or phase response of the signals upon which they implement custom operate crossovers Filter Bands The filters in the ISP 100 are arranged in bands each of which represent a single 2nd order filter in the DSP code Each band can be confi
62. 225 52542455458 26 a ere 2 3 Cable mM 2 4 Analog o MMC 2 4 Digital 2 5 2 6 General Purpose Inputs GPI 2 9 Luce pear 2 9 TROUBLESHOOTING 3 1 User IMOCINCATIONS 3 1 Ii Case ot 3 1 m 3 2 Factory Deiat mE E 3 2 Retrieving Version 3 3 Retrieving Serial Numbers REESE EO 3 3 UT 3 4 Changingthe Battery Candido dod ciun De 3 4 3 6 3 6 Shipping to Manufacturer for Repair or Adjustment 3 7 SPECIFICATIONS 4 1 COMPONSNIS 4 1 4 1 CIrOSSOVOE e re de ee e 4 1
63. 48 kHz Sample Rate is being used and no Sample Rate Converter is selected Card position dependent 3 Non Audio Input Stream Card position dependent 4 Slot Cannot be chosen as master and have sample rate converter present Card position dependent 5 An input slot must have an AES card to be master Card position dependent Low Battery yellow Please check battery Input Clip red Input audio has clipped before the DSPs Process Clip red Which slot and channel caused the clip The specifics of an error condition can be found by clicking on the button You are also able to clear the error indication If the error condition still exists or reoccurs the error LED will turn on again Using VUE IT 1 h Jh Ah Output Meters Meter Bank Figure 7 24 Output meter panel The Output Meters see Figure 7 24 provide monitoring of the outputs of the DSPs before digital to analog conversion To activate the Meters click on the green output triangles in the QuickMAP or click on the Meter Bank entry in the Project Manager and then click on the Design button 10 July 1998 PROCESSING COMPONENTS The components used in the VUE IT interface have a wide variety of controls for adjusting settings Each component description begins with a full explanation of the component including all of the parameters that can be adjusted In some areas the explanations may go into more depth than the average
64. 50 ms and the ramp up will be 50 ms Thus the total time between the start of the ramp down to the end of the ramp up is 100 ms Display recently opened files in the File Menu The check box turns on and off the Most Recently Used files MRU function Removing the check mark will disable the function and clear the list Open Device Status panel on error When a device status message is received the status panel is automatically opened Display QuickMAP pop up names If selected the pop up component nametags in the QuickMAP layout display are shown Display Filter Bandwidth in Q If the box is checked filter bandwidth to be displayed in terms of Q If it is unchecked bandwidth will be displayed in terms of octave fraction System Configurations see Figure 7 8 System Configurations x Directories New Projects CAPROGRA TNWUE ITMSP 1 D proje Modify Component Library CAPROGRA TNVUEJTNSP 1 0Ncomp Modify QuickMAP Library CAPROGRA TNVUEJTNSP 1 0Nqmar Modify Personal Company Name Telex Commincations Designer s Name John Q Public System Communications Serial Com 1 Default Preference Factory Defaults Figure 7 8 System configuration dialog New Projects This is the directory under which new projects are stored To modify the path click on the Modify button located to the right of the directory path entry Component Library This is the directory under which the comp
65. 6 while turning on the power Continue to hold in the switch until the front panel LEDs turn red and begin to rotate 10 July 1998 ote that when the factory default QuickMAP ie loaded one or more elot LEDs may blink yellow Thie ie normal operation and not an error Retrieving Version Numbers About VUE IT VUE IT for MERLIN ISP 100 Copyright 1996 98 EVI Audio Inc All Rights Reserved Application Version 2 04 ISP 100 OS Version 2 05 ISP 100 DSP Version 2 11 Figure 3 1 About VUE IT dialog Application OS and DSP version numbers can be obtained by clicking on the Help menu and then selecting the About entry See Figure 3 1 If an ISP 100 is not online only the application version number will be reported Retrieving Serial Numbers Properties Device Name Free Device Memory 88 Serial Number 19600019 1 Number of QuickSET s 1 Created 3 25 1998 at 03 20 15 Modified 3 30 1998 at 14 54 23 Master Clock Selection 10 Configuration Internal Motherboard Inputs 13 0 Input Slot Bit Level ae ae Cancel Figure 3 2 Properties dialog Clicking on the star icon in the Project Manager and then clicking on the Properties button will reveal the ISP 100 s serial number See Figure 3 2 Troubleshooting EN h Changing the Fuse WARNING The universal switching power supply in the ISP 100 adapts to input Disconnect AC power voltages from 90 to 264 VAC 50 60 Hz T
66. 8 BNC cable example Synchronizing to an external clock source requires RG 58 or other suitable 500 cable terminated with a BNC connector A precision 5 ppm clock source of 12 288 MHz 6 144MHz or 3 072 is supported The Master Clock Input must be set to external from the Properties for Merlin ISP 100 panel in the VUE IT software See Figure 2 18 and page 7 6 of this manual for more information Setup amp Installation THIS PAGE LEFT BLANK INTENTIONALLY TROUBLESHOOTING gt gt gt CAUTION lt lt lt NO USER SERVICEABLE PARTS INSIDE HAZARDOUS VOLTAGES AND CURRENTS MAY BE ENCOUNTERED WITHIN THE CHASSIS TO AVOID ELECTRICAL SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THESE OPERATING INSTRUCTIONS User Modifications C gt Modifications to Merlin products are not recommended Such SM modifications shall be at the sole expense of the person s or company responsible and any damage resulting from said modifications shall not be covered under warranty or otherwise User modifications void the warranty In Case of Problems Check the following items Verify that the unit is properly connected to an AC power source and the source is active Check the fuse Verify that the input connections are properly made WARNING Verify that the output connections are properly made Make sure the power Make sure the output relay indicators are green is disconnected from Check the inpu
67. 8 dB octave 3 Bessel 24 dB octave 4 order Butterworth 6 dB octave 1 Butterworth 12 dB octave 2 9 Butterworth 18 dB octave 39 Butterworth 24 dB octave 4 order Linkwitz Riley Butterworth Squared 12 dB octave 2 order Linkwitz Riley Butterworth Squared 24 dB octave 4 In addition the cutoff frequency attenuation and polarity in the low band the low mid band the mid high band and the high band may be independently adjusted and all of the filters in any band may be bypassed entirely The cutoff frequency in each filter is continuously variable from 20 Hz to 20 kHz Processing Components Crossover 8 18 The attenuation in each band is continuously variable from 96 dB and 0 plus mute The polarity in each band is selectable as or in phase or out of phase Each band may be bypassed in which case all of the crossover filters in that band will be bypassed while the crossover filters in the other bands will not be affected Four way Bessel and Butterworth Crossovers high mid high input low mid low Figure 8 9 Four way Bessel amp Butterworth crossover implementation In the ISP 100 4 way Bessel and Butterworth crossovers are implemented as shown in Figure 8 9 Bessel crossovers utilize Bessel filters Bessel filters are designed for maximally flat group delay meaning that they have nearly linear phase and exce
68. ARE AGREEING TO BECOME BOUND BY THE TERMS OF THIS AGREEMENT IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT DO NOT USE THIS PRODUCT PROMPTLY RETURN THE PRODUCT TO THE PLACE WHERE YOU OBTAINED IT FOR A FULL REFUND The installed Software as supplied by the Company is licensed not sold to you for use only under the terms of this license and the Company reserves all rights not expressly granted to you You own the product or other media on or in which the Software was originally or subsequently recorded or fixed but the Company retains ownership of all copies of the Software itself 1 License This license allows you to use the Software for internal purposes only on a single product in which it was installed 2 Restrictions a You may not market distribute or transfer copies of the Software to others or electronically transfer or duplicate the Software YOU MAY NOT REVERSE ENGINEER DECOMPILE DISASSEMBLE MODIFY ADAPT TRANSLATE RENT LEASE OR LOAN THE SOFTWARE OR CREATE DERIVATIVE WORKS BASED ON THE SOFTWARE OR ANY ACCOMPANYING WRITTEN MATERIALS b The Software and the accompanying written materials are copyrighted Unauthorized copying of the Software including portions thereof or the written materials is expressly forbidden c You understand that the Company may update or revise the Software and in so doing incurs not obligation to furnish such updates to you 3 Limited Warranty The Company does not warranty that the o
69. ARNING Felaktigt batteribyte kan medfora fara for explosion Anvand darfor endast samma typ eller likvardig typ enligt apparattillverkarens rekommendation Kassera forbrukade batterier enligt tillverkarens anvisning Troubleshooting Technical Support Technical questions should be directed to Customer Service Department Merlin Telex Communications Inc 9600 Aldrich Avenue South Minneapolis MN 55420 U S A Telephone 612 884 4051 Fax 612 884 0043 Helpful Information Be prepared to provide the following information if possible A detailed description of the problem QuickMAP being used Serial Number s Version numbers for application OS and DSP software Front panel LED information PC operating system used COM port used PC type and amount of memory installed 0 Procedure for Returns If a repair is necessary contact the dealer where this unit was purchased If repair through the dealer is not possible obtain a RETURN AUTHORIZATION from Customer Service Department Telex Communications Inc Telephone 1 800 828 6107 or 612 884 4051 Fax 1 800 323 0498 or 612 884 0043 DO NOT RETURN ANY EQUIPMENT DIRECTLY TO THE FACTORY WITHOUT FIRST OBTAINING A RETURN AUTHORIZATION Be prepared to provide the company name address phone number a person to contact regarding the repair the type and quantity of equipment a description of the problem an
70. Characteristics of Linkwitz Riley Crossovers As expected the polarity reference for the low mid band is the low band and the polarity reference for the high band is the mid high band However the polarity reference for the mid high band is unexpectedly the low band rather than the adjacent low mid band Thus if a 12 dB octave filter is used for LP and HP then the low mid band must be out of phase with the low band If a 12 dB octave filter is used for LP and then the high band must be out of phase with the mid high band And if a 12 dB octave filter is used for LP and then the mid high band must be out of phase with the low band not the low mid band A properly implemented 2 way 24 dB octave Linkwitz Riley crossover is characterized by 4 order Linkwitz Riley Butterworth Squared lowpass filter 6 dB magnitude response at crossover frequency 4 order Linkwitz Riley Butterworth Squared highpass filter 6 dB magnitude response at crossover frequency polarity of high band the same as that of low band In a 4 way crossover the bands associate in non obvious ways see Sum to Allpass Characteristics of Linkwitz riley Crossovers As expected the polarity reference for the low mid band is the low band and the polarity reference for the high band is the mid high band However the polarity reference for the mid high band is unexpectedly the low band rather than the adjacent low mid band Thus if a 24 dB
71. Clicking on one of the buttons will set the dynamic range Gain Trim The Gain Trim can be used to shift response up or down This is especially useful with shelving filters With shelving filters in a boost situation an amount of gain trim equal to the amount of boost should be added Gain trim does not need to be added in the case of a shelving filter with cut The Gain Trim can be adjusted two ways Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the Slider Click on the indicator on the slider and while continuing to hold down the mouse button move the mouse side to side The numbers in the box next to the slider will change When the desired level is reached release the mouse button Processing Components Filter 8 38 Fine F or Coarse C Control This button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the button will toggle the setting Isolate Iso Control This butt
72. EEEEEELCLELEEEELEEEEEEEEEELLEEEEEEEEEELEELLL LL k k 8k 10k 12k 14k 16k 18k 20k Hz 4 6 System Noise Floor 20 10 Ap 0 20 30 40 50 60 70 80 90 100 110 UO LI 2k TA TIT TIT TT FTT TP IT T E TT TT FT TTT TT rT D ee LLEEEEEEEEEEEEEEEEELELLELEELECLEEEEETEEEEELELELELCLEEELELEEEEEEEEL EL k 8k 10k 12k 14k 16k 18k 20k Hz 4k 6 System 0 01 0 009 0 008 0 007 0 006 0 005 0 004 0 003 0 002 VJ 1111111111111111111111111111111111111111111111111111111111111111111111111 11111 1111111111 11111 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 0 001 Hz AP is a trademark of Audio Precision Inc Specifications EN M 3A h3hl3A m MIM 1 amp MIM 2 Analog Input Modules Power Symbol Description Minimum Typical Maximum Units VA18P positive analog supply voltage 17 50 18 00 20 00 volts VA18M negative analog supply voltage 17 50 18 00 20 00 volts VD5P positive digital supply voltage 4 75 5 00 5 50 volts 18 positive analog supply current TT 43 T 81 46 0 85 48 3 milliamps IA18M negative analog supply current 72 41 6 76 43 75 80 46 0 milliamps ID5P positive digital supply current 113 114 123 124 133 134 mill
73. EGWP ass Fillers 8 30 IGMP ASS 8 30 Fiter S e 8 31 puce 8 31 Bolo ioo taps cena bene 8 32 Parametric EQ PINGS 8 32 PSS sS teats nea aeo oa a ed pha ashes nan pee 8 34 TRIMS S e 8 35 Filter esc ct E gts ne 8 35 2 8 35 ES ET ce 8 35 Bypass Control asc teat yaaa 8 35 E M 8 35 1 8 36 ESSI WIDE tU ere eee tcn ee ee 8 36 Using the Magnitude Mag or Phase Control 8 37 Using the Logarithmic Log or Linear 8 37 Using the 24 dB 40 dB 120 dB Controls 8 37 Gain rere 8 37 Fine F or Coarse C Control Mr 8 38 Isolate ISO CONTON E 8 38 Polarity Control cmm L 8 38 62 mee m 8 39 Metering Em 8 39 Gain Polarity m c 8 39 8 39 8 40
74. ISP 100 will be lost i e the unit will return to factory default mode 10 July 1998 Saving the ISP 100 configuration data to disk will guard against the loss of data in the event AC power fails before a failed battery has been changed Caution Use only the tool attached to the inside of the security cover to change the battery The tool is black anodized so it will not short out the battery or anything else DO NOT under any circumstance use pliers to grip the battery Doing so could cause damage See Figure 3 3 Replace the battery with a Renata CR2450N battery Replacement battery module removal tools as well as replacement batteries are available from Telex Their part numbers are Battery Module Removal Tool 40 04 052619 Replacement Battery 40 02 052055 Dispose of used battery promptly Keep away from children Do not disassemble and do not dispose of in fire Denmark Advarsel Lithiumbatteri Eksplosionsfare ved feijlagtig handtering af samme fabrikat og type Lever det brugte batteri tilbage till leverandoren FINLAND VAROITUS Paristo voi rajahtaa jos se on virheellisesti asennettu Vaihda paristo ainoastaan valmistajan suosittelemaan tyyppun Havita kaytetty paristo valmistajan ohjeiden mukaisesti VARNING Explosionsfara vid felaktigt batteribyte Anvand samma batterityp eller en eller en ekvivalent typ som rekommenderas av tillverkaren Kassera anvant batteri enligt fabrikantens instruktion SWEDEN V
75. P 10 July 1998 ooo Dither Select the desired bit level for the dither amplitude A Figure 8 13 Dither component Dithering see Figure 8 13 is used when shortening high resolution digital audio data words to a lower resolution for example when sending 24 bit ISP 100 audio data to 20 bit D A converters or directly to a 16 bit Digital Audio Tape recorder through a digital interface Simply truncating or discarding the unused bits results in audible artifacts that are generally objectionable Dithering does not eliminate these artifacts it changes their characteristics so that they are less noticeable to the human ear If after reducing the number of bits in a signal the original high resolution more bits signal is subtracted from the final lower resolution fewer bits signal the difference is called the error signal Final Signal Original Signal Error Signal Some very simple algebra shows that the final signal can be thought of as the sum of the error signal and the original signal Final Signal Error Signal Original Signal When audio data words are shortened by simple truncation it turns out that the error signal is correlated with itself and with the original signal This simply means that the error signal is not pure white noise and that the frequency and amplitude of the error signal is in some way related to the frequency and amplitude of the original signal If noise with
76. Property Range Default Fine Coarse Channel 1 Entry Gain 0 dB to 96 dB 0 dB 548 1dB Channel 1 Entry Polarity n a n a Channel 2 Entry Gain 0 dB to 96 dB 0 dB 548 1dB Channel 2 Entry Polarity n a n a Input Property Range Default Fine Coarse Left Gain A 0 2 4 8 dB 0 dB n a n a Right Gain B 0 2 4 8 dB 0 dB n a n a Left Pad A 20 dB Off n a n a Right Pad B 20 dB Off n a n a Output Property Range Default Fine Coarse Left Gain A 8 6 4 0 8 dB 0 dB n a n a Right Gain B 8 6 4 0 8 dB 0 dB n a n a Left Mute A on off off n a n a Right Mute B on off off n a n a Relay Mute on off ISP 100 Component Plots Compressor Limiter pepe 0 6 6 12 um m 18 4 24 71 24 1 MA 90 7 4 30 36 i 36 42 42 48 48 54 54 d 60 d 32 80 d B 66 66 F 42 72 5 5 5 78 S 84 84 F 90 90 06 96 102
77. RETURN ANY EQUIPMENT DIRECTLY TO THE FACTORY WITHOUT FIRST OBTAINING A RETURN AUTHORIZATION Be prepared to provide the company name address phone number a person to contact regarding the repair the type and quantity of equipment a description of the problem and the serial number s Shipping to Manufacturer for Repair or Adjustment All shipments of Merlin products should be made via United Parcel Service or the best available shipper prepaid The equipment should be shipped in the original packing carton if that is not available use any suitable container that is rigid and of adequate size If a substitute container is used the equipment should be wrapped in paper and surrounded with at least four inches of excelsior or similar shock absorbing material All shipments must be sent to the following address and must include the Return Authorization Factory Service department Telex Communications Inc West 15 Street Blue Earth MN 56013 U S A Upon completion of any repair the equipment will be returned via United Parcel Service or specified shipper collect 10 July 1998 End User License Agreement for Telex amp Software IMPORTANT Please read this document carefully before using this product THIS DOCUMENT STATES THE TERMS AND CONDITIONS UPON WHICH TELEX COMMUNICATIONS INC the OFFERS TO LICENSE THE INSTALLED SOFTWARE OR PROGRAM the SOFTWARE FOR USE WITH THE PRODUCT IN WHICH IT WAS INSTALLED YOU
78. SP 100 COMPLIB The files have the same name as the one assigned during export The format of the component file name is as follows File Name CMP Operating System OS Files OS files are loaded into the ISP 100 s flash memory by VUE IT For the procedure on updating the ISP 100 s OS see section 5 The OS files are by default located under the following directory CAPROGRAM FILES WUE ITISP 100 The format of the OS file name is as follows File Name OSI 10 July 1998 ooo Using VUE IT VUE IT has a variety of commands available to the user These commands are accessible via the menu items along the top of the VUE IT workspace window File see Figure 7 1 VUE IT for MERLIN ISP 100 c progra 1 vue it isp 100 projects demo Edit Tools Options Window Help New Project Open Project Save 5 Save as Activate Project Manager Activate QuickSET Manager Exit 1 c progra 1 vue itisp 100 projectsNdemoNdemoNdemo vue 2 1 wue ithisp 1 00 projects demo demo vue c Sprogra 1 wue ithisp 1 O0 projects test test vue Figure 7 1 File menu New Project Creates a new project file Open Project Loads an existing project Save Saves a project Save as Saves an existing project under another name Activate Project Manager Opens the project manager window after it has been closed Activate QuickSET Manager Opens the QuickSET Manager wind
79. TAL SOURCE XLR MALE Figure 2 8 AES EBU inputs AES EBU Input Connect the positive side of the line to pin 2 of the male 3 pin XLR connector and the negative side of the line to pin 3 of the connector In keeping with standard wiring practices the shield should not be connected at this end it should only be connected to pin 1 of the 3 pin female XLR connector or ground of the source end The cable used should be 1100 AES EBU compliant cable such as MOGAMI 3080 See Figure 2 8 for more information SPDIF Input DIGITAL ISP 100 AUDIO SOURCE XLR MALE RCA FEMALE SHIELD 2370 1 or 2400 5 Figure 2 9 SPDIF inputs Connect the positive side of the line to pin 2 of the male 3 pin XLR connector and the shield of the cable to pins 1 and 3 Connect 1 4 watt 2370 1 resistor between pins 1 and 2 of the 3 pin male XLR connector Connect the positive side of the line to the center pin of the RCA connector on the opposite end of the cable Connect the shield to the shield of the RCA connector on the opposite end of the cable The cable used should be RG 59 or other similar 75Q cable See Figure 2 9 or the application note MDM 1 SPDIF COMPATABILITY P N 42 02 053086 for more information Setup amp Installation AES EBU Output DIGITAL ISP 100 AUDIO DESTINATION HIG oW peel se LOAD XLR FEMALE Figure 2 10 AES EBU output Connect the positive side of the line to pin 2 of the 3 pin
80. The ISP 100 uses a universal switching power supply that accepts input voltages in the range of 90 VAC to 264 VAC 50 60 Hz All countries using 220 240 VAC except Australia use 2 amp slow blow fuse All countries using 100 120 VAC and Australia use a 1 amp slow blow fuse Operating Environment Internal temperature 50 F to 95 F 10 C to 35 C Humidity 20 to 80 Rack Mounting The ISP 100 may be installed in a standard 19 inch 483 mm equipment rack with one rack unit 1 75 inches or 44 5 mm of vertical rack space per unit 10 July 1998 Card Installation Procedure Figure 2 3 Battery module tool Figure 2 4 Card being inserted CAUTION 1 Ground yourself using a wrist strap and anti static mat Failure to observe 2 Turn off the ISP 100 anti static handling 3 Remove the screws securing the module slot cover procedures could 4 If you are not replacing an existing card please proceed to step 6 result in damage to 5 Use the battery module removal tool to remove the existing module equipment The battery module removal tool is attached to the inside of the front security cover Place the hook end of the tool into the slot at A the bottom of the module and pull Place the old module in an 4 anti static bag See Figure 2 3 for more information 6 Being careful to avoid scraping the underside of the board slide the ATTENTION new module into the bottom slots on the card guides located OBSERVE PRECAUTIONS
81. actor Sensitivity A signal s crest factor is the ratio of a its peak level to its average level The signal having the lowest possible crest factor is the square wave whose peak and average levels are equal and whose crest factor is therefore 1 0 The peak level of a pure sinewave tone is 1 414 times its average level a sinewave therefore has a crest factor of 1 414 Most music and speech signals contain peaks that are very much higher than their average levels therefore their crest factors are very much greater than one The important points to remember are that a signal s peak value is always greater than or equal to its average value and that the crest factor of any signal is therefore always greater than or equal to 1 0 The Crest Factor Sensitivity adjustment on the ISP 100 limiter function controls its sensitivity to the crest factor of the input signal It works like this The signal level detection algorithm used in the ISP 100 limiter consists of two separate detectors operating in parallel One of the detectors computes the average level over the selected detection window the other computes the peak level of each input sample The peak level is multiplied by the setting of the Crest Factor Sensitivity control always a number between zero and 8 49 one The two quantities are then compared and the larger is returned as the signal level When the Crest Factor Sensitivity is set to 0 00 the ISP 100 limiter operates as a t
82. anslates to Q between 17 3 and 0 404 Boost and Cut In the ISP 100 EQ filters the boost cut is continuously variable from 12 dB to 12 dB Peaked HighPass Filters The Peaked HighPass filter supplied with the ISP 100 is designed to provide bass boost appropriate for low frequency extension in vented box loudspeakers As the input frequency is reduced the filter response rises toward the selected peak magnitude at approximately the selected cutoff frequency and then returns to a 12 dB octave rolloff characteristic below Peak Magnitude In the ISP 100 Peaked HighPass filter the peak magnitude of the filter response is continuously variable from 0 dB to 20 dB The peak occurs at approximately the selected cutoff frequency when the selected Peak Magnitude is large it occurs at somewhat higher frequency when the selected Peak Magnitude is small If the peak magnitude is selected to be 0 dB then the peak occurs at infinite frequency and the actual magnitude at the cutoff frequency is 3 dB 20 18 16 14 12 10 Peak dB Figure 8 16 Peak Magnitude vs Q relationship The relationship between Peak Magnitude and filter Q is shown in Figure 8 16 10 July 1998 ooo Cutoff Frequency The cutoff frequency is the design frequency of the highpass filter and is only approximately representative of the location of the magnitude peak In the ISP 100 the cutof
83. assthrough From input through sample rate converter to output via passthrough From 5000 pin on card connector through transmitter to output The fractional sample delay is inherent in the Crystal CS8404 transmitter From input through sample rate converter to output via passthrough Frequency i is tripled by a PLL on the MDM 1 before being applied to the sample rate converter Must be derived from MCLK Must be derived from MCLK Must be derived from MCLK Must be derived from MCLK Must be nominally 48 kHz when installed in ISP 100 From input to output via passthrough From input to output via passthrough When installed in ISP 100 A DC to Fs 2 From input to output via passthrough From input to output via passthrough From input through receiver to SDIO pin on card connector From SDOO pin on card connector through transmitter to output The fractional sample delay is inherent in the Crystal CS8404 transmitter From input to output via passthrough Must be Fs x 256 Must be derived from MCLK z2 Must be derived from MCLK Must be derived from MCLK Must be derived from MCLK co Ro Physical Height 1 75 inches 44 5 mm Width 19 0 inches 483 mm Depth 14 5 inches 0 5 368 mm 12 7 mm for protrusions Weight Approx 12 9 Ibs 5 9 kg Included Accessories IEC power cord user s manual software spare fuse Power Universal AC input v
84. aw data to produce final data for use by other digital systems and or conversion back to analog signals A circuit or device which passes one frequency or frequency band while blocking others or vice versa In a selective filter the power current or voltage loss in decibels that takes place within the passband The frequency band rejected by a band suppression filter The frequency at which the transmission figure of a filter is below its maximum value by a prescribed amount typically 3 dB The frequency band defined by the upper and lower cutoff frequencies of a bandpass filter The attenuation band of a band suppression filter See FILTER ATTENUATION BAND See BOOST Gate Limiter Limiting Muting Phase shift Polarity QuickMAP QuickSET RS 232 Serial cable Serial port Threshold Window A device or circuit which has no output until it is triggered into operation by one or more enabling signals or until an input signal exceeds a predetermined threshold amplitude A device or circuit whose output signal amplitude remains at some predetermined level in spite of wide variations of input signal amplitude The restriction of the maximum peak amplitude of a signal to a designated level The act of preventing signal from being output 1 A change in the displacement as a function of time of a periodic disturbance having constant frequency 2 The magnitude of such a change measur
85. been entered or selected click on the OK button 2 prompted again for 1 An ISP 100 was detected and communications have been established 8 has been placed in online mode can change it at any time by clicking on the Option menu and selecting Configure Figure 5 7 ISP 100 detected dialog After clicking on the OK button a dialog box like the one in the Figure 5 7 should appear Click on the OK button The ISP 100 and the PC are now ready for use together 10 July 1998 1 AnISP 100 was NOT detected VUE IT has been placed in offline mode 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 in Figure 5 7 the cable connecting the computer to the ISP 100 should be checked If no problem is found there try selecting a different serial port x e Error Type Communications Error 2 Function C Config Launch Panel Error Unable to configure the specified Communications Port Please select an alternate port Figure 5 9 Communications error dialog If a dialog box similar to the one in the Figure 5 9 appears then a serial port that does not exist has been selected Another serial port must be selected You can change the serial port selection at any time by clicking on the Option menu and selecting Configure If you continue to have problems please contact Technical Support See section 3 for contact information
86. change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Passband Gain The Passband Gain can be adjusted three ways Using the Knob Click on the indicator on the knob and while continuing to hold down the mouse button move the mouse in an arc The numbers in the box below the knob will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to
87. cription Minimum Typical Maximum Units F Sample Rate for Digital TBD 48 96 kHz Input Data THD N Total Harmonic Distortion 0 00002 plus Noise RELATIVE M IMD Intermodulation Distortion 0 SMPTE 4 1 Jitter in Output Clock 415 ps Tolerable Jitter in Input 35 ns Clock before Loss of Lock Resolution input 24 24 bits Resolution output 24 24 24 bits Frequency Response 0 dB Dynamic Range Equal to Dynamic Range dB 2 of input signal Noise Floor Equal to Noise Floor dB 7 of input signal Delay through receiver 2 2 WSR periods Delay through transmitter WST periods Interchannel Phase Deviation 0 Degrees MCLK Master Clock 4 TBD 12 288 24 576 MHz WSR Receive Word Clock x MCLK 256 Hz WST Transmit Word Clock MCLK 256 Hz SCKR Receive Bit Clock MCLK 4 Hz SCKT Transmit Bit Clock MCLK 4 Hz Z Input Impedance 110 Ohms z Output Impedance 110 Ohms Miscellaneous Overall Size 8 40 long by 2 55 wide by 1 50 high Weight 3 8 Ounces Input Connector 3 Pin standard female XLR Output Connector 3 Pin standard male XLR XLR pinout Pin 1 shield Pin 2 positive input Pin 3 negative input Input Data Format AES EBU AES3 Professional and S PDIF IEC958 Consumer data formats are automatically identified and correctly decoded Output Data Format AES EBU Professional regardless of input data format De emphasis Not implemented emphasis information from Channel Status Bits is relayed to host via Serial Peripheral Interface SPI
88. ct directories company name designer s name communications settings etc 10 July 1998 ooo Window see Figure 7 5 YUE IT for MERLIN ISP 100 c progra 1 vue it isp 100 p File Edit Tools Options Help ee Vise Figure 7 5 Windows menu Cascade Arranges panels in overlapping layers Tile Arranges panels side by side Arrange Icons Arranges minimized panels side by side Help see Figure 7 6 VUE IT for MERLIN ISP 100 c progra 1 vue it isp 1f File Edit Tools Options Window About Figure 7 6 Help menu About Lists the current application software version OS version and DSP version if an ISP 100 is connected and online If an ISP 100 is not online only the application software version will be reported Preferences see Figure 7 7 VUE IT Preferences System Level Soft Mute Ramp Ms Display recently opened files in File Menu Open Device Status panel on error QuickMap Level v Display QuickMAP pop up names Component Level Display Filter Bandwidth in 9 tona Figure 7 7 VUE IT preferences dialog Soft Mute Ramp in Ms This sets the amount 0 ms 1000 ms of ramp up and ramp down Using VUE IT e there 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 If 50 ms of time is specified the ramp down will be
89. ction Digital I O In Mute RX Mutes the AES receiver data stream Out Mute TX Mutes the AES transmitter data stream Pass Through Routes the input from the receiver directly through the transmitter to the card s output the output data from the DSP is bypassed Either the In Mute or Out Mute will mute the output when Pass Through is on Data may still be received when Pass Through is on Pass Through is only valid with a 48 kHz bit stream or witha non 48 kHz bit stream and Sample Rate conversion enabled A non 48 kHz sample rate with no sample rate conversion will result in an error when the Pass Through option is selected SRC Clicking on the SRC button turns on the Sample Rate Converter The SRC is used to convert non 48 kHz data streams into 48 kHz data streams compatible with the ISP 100 Note Turning on the SRC will result in a 20 bit output data stream except in the case of Pass Through Using VUE IT 716 Status Information Digital Status Digital Card Status Number of Input Bits Mo Input Signal Input Stream Format No Input Signal Input Stream Emphasis No Input Signal Input Sample Rate No Input Signal Figure 7 22 Digital status panel Status information can be obtained for card slots 1 and 2 by clicking on the Status button in the desired slot See Figure 7 22 Sample Rate Converter On indicates that the sample rate conversion option is selected onthe card The card cannot be se
90. ctor of the input signal It works like this The signal level detection algorithm used in the ISP 100 compressor consists of two separate detectors operating in parallel One of the detectors computes the average level over the selected detection window the other computes the peak level of each input sample The peak level is multiplied by the setting of the Crest Factor Sensitivity control which is always a number between zero and one The two quantities are then compared and the larger is returned as the signal level When the Crest Factor Sensitivity is set to 0 00 the ISP 100 compressor operates as a traditional compressor responding to average signal levels when the Crest Factor Sensitivity is set to 1 00 the ISP 100 compressor operates as a traditional compressor responding to peak signal levels Values in between represent various hybrids of the two If the compressor is to ignore peaks and respond only to average levels then the Crest Factor Sensitivity may be set near zero If the compressor is to respond only to peaks then the Crest Factor Sensitivity may be set near one Good results may be obtained by following these steps 1 Set the Crest Factor Sensitivity to 0 00 This will cause the ISP 100 compressor to behave like a traditional compressor responding to average signal levels 2 Set all of the other compressor controls as appropriate for the signal being compressed just as they would be set ina traditional compre
91. cy 0 05 Z Output Impedance 594 600 x Operating Temperature 50 75 Operating Humidity 20 50 Miscellaneous Overall Size 8 40 long by 2 55 wide by 1 50 high Weight 4 3 ounces Input connector 3 Pin standard male XLR Mating connector 3 Pin standard female XLR Internal connector XLR pinout Pin 1 shield Pin 2 positive signal Pin negative signal De emphasis 48 kHz de emphasis selectable via SPI control I F Relay mute Left and right output relay mute selectable via SPI control I F DAC mute Left and right individually or group selectable via SPI control I F Serial Data Interface 7 formats available selectable via SPI control Analog Gain Selectable 0 8 6 4 8 dB via SPI control I F Notes On Ro N gt 48 pin standard female F size per DIN 41 612 Unity gain SMPTE 4 1 60 Hz amp 7 kHz sine waves Unity gain DIM30 4 1 3 15 kHz SQ wave amp 15 kHz sine wave 30 kHz LPF Group Delay inherent in conversion process WST 4 wz Minimum levels are single ended maximum levels are differential and balanced Bridging load Relative to unity gain 1 kHz Electronically balanced RF surpressed differential impedance 20 20kHz Maximum 20 00 20 00 5 50 100 55 134 Maximum 0 007 0 007 0 006 107 80 2 1 0 12 292 48 02 30 25 606 100 80 Units volts volts volts milliamps milliamps milliamps Units dBu dB bits dB WST MHz kHz dB dBu
92. d Filter stop band Gain 10 July 1998 EN h To reduce a signal s overall amplitude Digital to Analog Conversion of a digital representation to an analog equivalent signal Decibels with respect to digital full scale The full scale amplitude zero dBFS value is the peak value of a sinewave whose positive or negative peak just full scale GB relative to a reference value of 1 milliwatt dBm is thus a power unit and requires knowledge of power levels voltage and current voltage and impedance or current and impedance rather than just voltage Relative dB dB relative to an arbitrary reference value The reference value must be stated for this to be a meaningful unit GB relative to a reference of 0 7746 Volts Since 0 7746 Volts is the voltage across a 600 Ohm resistor when one milliwatt is being dissipated in that resistor dBu and dBm are numerically equal in a 600 Ohm impedance environment GB relative to a reference value of 1 Volt The interval between the instant at which a signal or force is applied or removed and the instant at which a circuit or device subsequently responds in a specified manner The reduction of bits in a digital audio signal for use on a target system that uses a smaller number of bits than the originating system Digital Signal Processing The art and science of digitally encoding analog signals producing raw data performing one or more mathematical routines on the r
93. d the serial number s 10 July 1998 Save the box the Shipping to Manufacturer for Repair or Adjustment ISP 100 was All shipments of Merlin products should be made via United Parcel shipped in Ib makes Service or the best available shipper prepaid The equipment should be convenient way to shipped in the original packing carton if that is not available use any package a repair suitable container that is rigid and of adequate size If a substitute unit container is used the equipment should be wrapped in paper and surrounded with at least four inches of excelsior or similar shock absorbing material All shipments must be sent to the following address and must include the Return Authorization Factory Service department Telex Communications Inc West 15 Street Blue Earth MN 56013 U S A Upon completion of any repair the equipment will be returned via United Parcel Service or specified shipper collect Troubleshooting THIS PAGE LEFT BLANK INTENTIONALLY Ee SPECIFICATIONS Components Compressor Property Range Default Fine Coarse Bypass in out out n a n a Threshold 60 dB to 0 dB 0 dB 5 dB dB Compression Ratio 1 2 1 to 24 1 1 21 n a n a Attack Time 20 msec to 50 ms 20 msec 02 ms 1ms Release Time 20 msec to 5 sec 5000 ms 1 ms 100 ms Detection Window 20 msec to 5 sec 50 ms 1ms 100 ms Crest Factor 0 00 to 1 00 70 01 05 Knee hard soft hard n a n a Sidechain Channel self max of both or depend
94. ditions the output level tracks the input level perfectly as it rises up to the threshold Above the threshold the output level does not change There is an abrupt transition from no limiting below the threshold to limiting above Under soft knee conditions the output level and the input level track until approximately 12 18 dB below the threshold beyond which they slowly begin to diverge The output level is approximately 2 5 dB below the input level at the threshold The divergence continues to increase gradually until approximately 6 dB above the threshold at which point the output level is equal to the threshold value and beyond which the output level no longer rises There is a smooth gradual transition from no limiting below the threshold to limiting above The sonic differences between the two knee types are often subtle and are very much signal dependent Experimentation is recommended Sidechain Source There are situations in which limiting is applied to one channel based upon the level in another channel This might be used in a stereo signal pair to prevent image shift one of the channels would be considered to be the level reference and the limiters in both channels would be set up identically The Sidechain Source channel selection indicates the channel whose level is to be used to control the limiter The choices for sidechain source are the input channel itself one other channel or the maximum amplitude of these two at an
95. e Bessel filters used in the ISP 100 crossovers are automatically scaled so that their amplitude response is 3 dB at the selected cutoff frequency regardless of the filter order The amplitude response of a Butterworth filter is naturally 3 dB at the selected cutoff frequency regardless of the filter order Three way Linkwitz Riley Crossovers high mid input low Figure 8 7 Three way Linkwitz Riley crossover implementation In the ISP 100 3 way Linkwitz Riley crossovers are implemented as shown in Figure 8 7 Linkwitz Riley designs constitute a special even order in phase class of two way sum to allpass response crossovers and they must be configured in accordance with very strict phase and polarity requirements Because the basic Linkwitz Riley crossover is a 2 way design extra steps must be taken in 3 way Linkwitz Riley crossovers to ensure that these phase and polarity requirements are met Note the presence of the unexpected allpass filter in the high Processing Components Crossover ES hJ 3 band and LP lowpass filter in the low band The inclusion of these filters is mandatory for proper implementation of the 3 way Linkwitz Riley crossover they ensure that the phase shift and magnitude response in each band match those of the other bands to maintain the fundamental Linkwitz Riley sum to allpass quality A detailed explanation of the use of compensation filters such as these may be found
96. e component is inserted into the signal processing chain If the LED is red then the component is bypassed in the signal processing chain A bypassed component will be colored red in the QuickMAP 10 July 1998 Crossover Butterworth M Butterworth M JE 4 fi 000 0 fi 000 0 Cutoff Freq Cutoff Fre a 0 0 v 0 0 Passband Gain Passband q 2 L 2 E Figure 8 3 Two way crossover component SM E u T Crossovers see Figure 8 3 are used to divide the audio signal into Custom crossovers multiple bands appropriate for different types of loudspeakers or other than those loudspeaker elements In QuickMAPs 2 way 3 way and 4 way available from the crossovers may exist Each of these crossovers may be implemented crossover using Bessel or Butterworth filters with 1St through 4th order slopes or component can be Linkwitz Riley filters with 2nd or 4th orger slopes or combinations conetructed by thereof using the filter component Two Way Crossovers HP low input LP high Figure 8 4 Two way crossover implementation In the ISP 100 2 way crossovers are implemented as shown in Figure 8 4 Processing Components Crossover The lowpass filter LP and the highpass filter HP may each be independently configured as Bessel 6 dB octave 1 order Bessel 12 dB octave 2 9 Bessel 18 dB octave 3 Bessel 24 dB octave
97. e in an arc The numbers in the box below the knob will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Key Channel To change settings click on the desired entry Fine F or Coarse C Control This button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the button will toggle the setting Bypass Control master This button determines if the component is in the processing chain If the LED on the button is gray then the component is inserted into the signal processing chain If the LED is red then the component is bypassed in the signal processing chain A bypassed component will be colored red in the QuickMAP Proce
98. e selected compression ratio Threshold is adjustable in the range 60 dBFS to 0 dBFS Attack Time A compressor monitors the level of the input signal and controls the level of the output signal accordingly When the input signal level suddenly increases a compressor allows the output signal level to also increase but only as much as is appropriate for the selected compression ratio setting Desirable sound effects can sometimes be created if a compressor is forced to ramp the output signal level to its new value gradually rather than instantaneously The Attack Time control adjusts the duration of this ramp Attack Time is adjustable in the range 20 Sec one sample to 50 mSec Release Time A compressor monitors the level of the input signal and controls the level of the output signal accordingly When the input signal level suddenly decreases a compressor allows the output signal level to also decrease but only as much as is appropriate for the selected compression ratio setting A compressor generally sounds better if it is forced to ramp the output signal level to its new value gradually rather than instantaneously The Release Time control adjusts the duration of this ramp Release Time is adjustable in the range 20 uSec one sample to 5 mSec Knee Selection Below the threshold level no compression is taking place and any changes in input level are matched exactly by changes in output level Above the threshold level compressio
99. e than two milliseconds of delay is introduced from any analog input to analog output with full processing and delay set to zero The ISP 100 is flexible A General Purpose Interface GPI allows multiple system configurations to be selected without the need of a PC to control the unit This is accomplished through user supplied contact Introduction EN closures This interface allows users to change system settings directly and or scroll through various settings About this Manual This manual is covers the installation and operation of the ISP 100 s hardware and software The ISP 100 has been designed to be as user friendly as possible However this manual should be read before attempting to install or operate the ISP 100 Customer Support Be sure to fill out the customer support registration card included in the software envelope This will register you in our database of users Conventions Used in this Manual The margins in this manual include space for icons that provide additional information to the user The icons and their uses are given in Table 1 1 Calls attention to Calls attention to potential problems tX remind users to perform a task or action Calls attention to Calls attention to helpful tips things that could cause damage Table 1 1 Information icons 10 July 1998 ooo Save the shipping carton in cage the ISP 100 needs to be returned for service SETUP a
100. ed in fractions of a wavelength or in electrical degrees See PHASE SHIFT The diagram outlining the processing components in a particular processing setup The group of component settings associated with a QuickMAP A standard covering serial communications between computers and other equipment A cable used to connect between two serial ports The connectors used are typically DB 9 DB 25 or RJ 45 A communications port located either on a computer or on computer controlled equipment 1 The initial observable point of an effect e g threshold of hearing 2 A predetermined point such as a minimum current or voltage for the start of operation of a circuit or device An interval during which a circuit is gated open to permit signal sampling During this interval a window is figuratively OPEN to the signal Glossary THIS PAGE LEFT BLANK INTENTIONALLY STANDARD QUICKMAPS VUE IT ships with eighteen standard QuickMAPs These mappings were designed to be flexible enough to be applied in a wide variety of signal processing applications This appendix provides drawings of the QuickMAPs for reference purposes The drawings begin on page B 2 Identification of Slots and Connectors The slots and connectors used are indicated by either the word IN in the case of an input or OUT in the case of an output In both cases the word IN or OUT is followed by a number 1 5 and a letter A or B The number indicates the slo
101. en the desired frequency is reached release the mouse button Please note that exact center frequencies may be impossible to obtain using this method C Me b Filter bands can be E The Boost gain or Cut attenuation of a filter can be adjusted three stacked for ways increased boost cut Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Using the Filter Tool Click on the red dot on the active filter band While holding down the mouse button move the mouse up and down A display will appear indicating the amount of boost or cut When the desired level is reached release the mouse button Bandwidth The Bandwidth of the filter can be adjusted in three ways Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level
102. es all other frequencies totally unaltered notch filter design involves compromises that allow some width in the notch and less than infinite attenuation at the notch frequency In the ISP 100 notch filters the notch frequency is continuously variable from 20 Hz to 20 kHz In the ISP 100 notch filters the notch width is continuously variable from 1 12 octave to 1 octave In the ISP 100 notch filters the notch depth attenuation at the notch frequency is continuously variable from 50 dB to 0 dB NOTE The width of a notch filter is defined by the points on either side of the notch at which the response is 3 dB relative to the unaltered signal not at the points where the response has risen 3 dB relative to the notch depth The ISP 100 notch filters use the correct definition of width so a octave notch in the ISP 100 is considerably narrower than a octave parametric EQ filter whose width is defined relative to the notch depth Parametric EQ Filters Equalization EQ filters are used to modify the frequency response in a band of frequencies Parametric EQ filters provide for adjustment of all filter parameters center frequency boost or cut and bandwidth as opposed to graphic EQ filters which have fixed frequency and bandwidth and provide only for adjustment of boost or cut 10 July 1998 The EQ filters in the ISP 100 full parametric Each may be adjusted for center frequency boost or cut and bandwidth
103. ession is applied to one channel based upon the level in another channel This might be used in a stereo signal pair to prevent image shift one of the channels would be considered to be the level reference and the compressors in both channels would be set up identically Another example might be ducking where the compression applied to background music in one channel would be controlled by the level of the announcer s voice in another The Sidechain Source channel selection indicates the channel whose level is to be used to control the compressor If the input channel is to control itself then it should be selected as the Sidechain Source Otherwise the appropriate other channel should be selected from the set of available Sidechain Sources in the menu Unfamiliar Controls There are two controls on the ISP 100 compressor that are not available in traditional dynamic range compressors These controls provide much greater flexibility and utility to this compressor than can be achieved with traditional compressors Detection Window The detection window is the period of time over which the compressor computes the average signal level Every dynamic range compressor that operates upon average signal level uses a detection window In traditional compressors this window is of fixed length and the operator may not even be aware of that length Some traditional compressors provide switching between average and peak detection This is actually j
104. ettings click on the arrow next to the number in the text box A selection list will appear The list may or may not be scrollable Click on the desired entry to make a selection Using the Pad Control This button controls the insertion of a 20dB pad in the signal path A gray LED on the button indicates the pad is not inserted A red LED on the button indicates that the pad is inserted Clicking on the button will toggle the setting 10 July 1998 Output The Output function controls the output levels from the unit Using the Stereo Control This button controls the tracking of the Gain Attenuator levels If the LED is gray then the two channels do not track each other If the LED is blue then the channels will track each other Clicking on the button will toggle the setting Mute Control This button determines if the output signal will be muted A gray LED indicates that the signal is not muted while a red LED indicates that the signal is muted Clicking on the button will toggle the setting Using the Relay Control This button activates and deactivates the output relays A gray LED indicates that the audio path is not complete A green LED indicates that the audio path is complete Clicking on the button will toggle the setting Gain To change settings click on the arrow next to the number in the text box A selection list will appear The list may or may not be scrollable Click on the desired entry to make a sele
105. etween the ISP 100 and the PC running VUE IT Getting Started B p Starting a New Project Create New Project Project Name Project Path ciNprogra 1 vue itisp 1 D projects Create Method Build from Script Ll Upload from ISP 100 test New Subdirectory Drives c H Figure 6 2 Create new project dialog To start a new project select New Project from the File menu A panel similar to the one in Figure 6 2 will appear You are allowed to select a name of up to eight characters for the project assign a path for the project to be stored and create a new subdirectory if needed You also will need to select the method by which the new project will be created To select the method click on the diamond to the left of either the Build from Script or Upload from ISP 100 options The Build from Script option uses files stored on your hard drive to create the QuickMAP The Upload from ISP 100 option creates the QuickMAP based on the information stored in an ISP 100 that is connected to the PC When you have given the project a name assigned a path or directory and selected the creation method click on the Create button to start the project creation process QuickMAP Selection B Name VO Configuration _ MedTme J E 4 Inputs 6 Outputs 12 05 1997 13 35 51 12 22 1997 09 53 09 MondoEq ler 4X6T hru 2X8Thru 4 5Cmbc 2 Inputs x 2 Outputs 4 Inputs x Outputs 4 Inp
106. f frequency is continuously variable from 20 Hz to 20 kHz AllPass Filters AllPass Filters shift phase without altering magnitude The allpass filters supplied with the ISP 100 are designed to provide phase compensation for multiway Linkwitz Riley crossover networks The 1st order allpass filters compensate for 2nd order 12 dB octave Linkwitz Riley crossovers the 2nd order allpass filters compensate for 4th order 24 dB octave Linkwitz Riley crossovers A detailed explanation of the use of allpass compensation may be found in Active Realization of Multiway All Pass Crossover Systems by Joseph A D Appolito Journal of the Audio Engineering Society Volume 35 Number 4 April 1987 In the ISP 100 allpass filters the filter order is selectable from 1st order and 2nd order In the ISP 100 allpass filters the center frequency is continuously variable from 20 Hz to 20 kHz Filter Type To change settings click on the arrow next to the entry in the text box A selection list will appear The list may or may not be scrollable To make a selection click on the desired entry Active Band To change settings click on the arrow next to the number in the text box A selection list will appear The list may or may not be scrollable To make a selection click on the desired entry Bypass The Bypass control bypasses an individual filter band If the LED on the button is gray then the filter band is active If the LED on the button is red
107. f frequency is defined as the frequency at which the magnitude of the filter response has fallen to 3 dB relative to the unfiltered signal in the Bessel and Butterworth types and to 6 dB in the Linkwitz Riley types In the ISP 100 highpass filters the cutoff frequency is continuously variable from 20Hz to 20 kHz 10 July 1998 In the ISP 100 highpass filters the passband slope is selectable from 6 dB octave 12 dB octave 18 dB octave and 24 dB octave for the Bessel and Butterworth types and from 12 dB octave and 24 dB octave for the Linkwitz Riley type NOTE Linkwitz Riley filters are also known as Butterworth Squared filters because they are the product of two Butterworth filters A 12 dB octave Linkwitz Riley highpass filter may be constructed by cascading two identical 6 dB octave Butterworth highpass filters a 24 dB octave Linkwitz Riley highpass filter may be constructed by cascading two identical 12 dB octave Butterworth highpass filters LowShelf Filters LowShelf Filters raise or lower the magnitude response at frequencies below the hinge frequency without altering the response at frequencies above the hinge frequency Since it is not realistically possible to create a perfect filter that alters only low frequencies without affecting high frequencies lowshelf filter design involves compromises that allow some rounding of the corner at the filter hinge frequency and some slope in the transition to the unaltered high f
108. ge level of a signal if any peaks in the signal are clipped then the Gain meter reads 0 dB Gain and Polarity Application of attenuation within the gain component is accomplished by multiplying each data sample by a number whose absolute value lies between 8 0 18 dB and 0 000015625 96 dB Muting is accomplished by multiplying each sample by zero Polarity inversion is accomplished by multiplying by a negative number All gain and polarity changes are soft meaning that they are gradually changed from the old setting to the new in order to help prevent the occurrence of clicks or pops Bypass Bypassing the gain component is equivalent to setting its attenuation Processing Components Gain 8 40 to 0 dB and its polarity to positive in phase Bypassing in a muted channel un mutes it Metering The meter located at the left of the component measures level in dBFS The meter s level will turn red 3 dB before clipping The red clip light is located at the top of the meter The green signal present light is located at the bottom of the meter Master Attenuator The Master Attenuator can be adjusted three ways Using the Slider Click on the indicator on the slider and while continuing to hold down the mouse button move the mouse up and down The numbers in the box below the slider will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete
109. gured as one of seventeen different filter types LowPass Filter 6 dB octave LowPass Filter 12 dB octave HighPass Filter 6 dB octave HighPass Filter 12 dB octave LowShelf Filter 6 dB octave LowShelf Filter 12 dB octave HighShelf Filter 6 dB octave HighShelf Filter 12 dB octave Notch Filter Parametric EQ Filter Peaked HighPass Filter AllPass Filter 1st order AllPass Filter 2nd order More filters available in the Crossover filters Processing Components Filter EF All filters in the ISP 100 are derived from analog prototypes The analog filters are approximated by the Bilinear Transform method prewarped to match response at the critical frequency appropriate for the type of filter cutoff frequency for LowPass HighPass and Peaked HighPass hinge frequency for LowShelf HighShelf center frequency for all others Each filter band may be bypassed so as to pass the signal unaltered LowPass Filters LowPass Filters pass low frequencies and stop high frequencies Since it is not realistically possible to create a perfect filter that passes low frequencies totally unaltered and stops high frequencies completely lowpass filter design involves compromises that allow some rounding of the corner at the filter cutoff frequency and some slope in the transition to the high frequency stopband Different compromise schemes are given different names the ISP 100 incorporates Bessel Butterworth and Linkw
110. he same as the name given the project when it was created The file name formats are as follows Project File lt File Name gt VUE Project QuickMAP File lt File Name gt QMS Project QuickSET File lt File Name gt QMO Project GPI Settings File Getting Started A Archiving Projects To save a project for archival purposes do the following 1 Exit VUE IT 2 Savethe project directory and the four files mentioned previously to the archival media i e floppy disk zip disk tape CD etc The directory name will usually be the name you assigned the project Mounting Projects To install a project from an archive do the following 1 Exit VUE IT 2 Create a directory under the C PROGRAMS VUE IT ISP 100 PROJECTS directory 3 Copy the four files mentioned previously above to the new project directory created in step 2 4 Restart VUE IT QuickMAP Template Files QuickMAP template files are by default located under the following directory C PROGRAM FILES VUE IT ISP 100 QMAPS The QuickMAP template file location is important to users who either have access to QuickMAP creation software or have been sent a new QuickMAP not contained in a standard VUE IT installation Component Directory Component files created by the Component Export command and used by the Component Import command are by default located under the following directory CAPROGRAM FILES VUE IT I
111. hed by multiplying each sample by zero Polarity inversion is accomplished by multiplying by a negative number All gain and polarity changes are soft meaning that they are gradually changed from the old setting to the new in order to help prevent the occurrence of clicks or pops Bypass Bypassing cut is equivalent to setting its attenuation to O dB and its polarity to in phase Bypassing a muted attenuator un mutes it Attenuator The attenuator can be set three ways Using the Knob Click on the indicator on the knob and while continuing to hold down the mouse button move the mouse in an arc The numbers in the box below the knob will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Fine F or Coarse C Control This
112. his translates to approximately 0 2750 feet in 0 275 inch increments assuming that the speed of sound is approximately 1100 ft sec Setting Delay The Delay control can be adjusted two ways Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Fine F or Coarse C Control This button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the button will toggle the setting Bypass Control master This button determines if the component is in the processing chain If the LED on the button is gray then the component is inserted into the signal processing chain If the LED is red then the component is bypassed in the signal processing chain A bypassed component will be colored red in the QuickMA
113. iamps Performance Symbol Description Minimum Typical Maximum Units THD N Total Harmonic Distortion Noise 0 003 0 002 0 007 0 006 IMD Intermodulation Distortion 0 004 0 007 DIM Dynamic Intermodulation Distortion 0 003 0 006 Noise Floor 110 107 dBu Channel Crosstalk 100 80 dB N Resolution 20 24 bits Frequency Response 0 01 0 1 02 0 15 dB Delay 18 38 7 WST MCLK Master Clock 12 283 12 288 12 292 MHz WST Word Clock 47 98 48 000 48 02 kHz Oversampling 64X 128X Stopband Attenuation 100 110 dB Maximum Input Level 26 30 32 dBu Interchannel Phase Deviation 0 5 1 0 degrees CMRR Common Mode Rejection 52 40 dB Gain Accuracy 0 05 0 25 dB Z Input Impedance 11000 12000 13500 ohms Operating Temperature 50 75 100 F Operating Humidity 20 50 80 Miscellaneous Overall Size 8 40 long by 2 55 wide by 1 50 high Weight 4 0 ounces Synchronous Sampling Multiple cards can be synchronized via DPD signal on connector Input connector 3 Pin standard female XLR Mating connector 3 Pin standard male XLR Internal connector 48 pin standard female F size per DIN 41 612 XLR pinout Pin 1 shield Pin 2 positive signal Pin negative signal Serial Interface Master or slave selectable via SPI control I F Clock Mode 256 or 384 times sample rate selectable via SPI control I F Digital Power Down Selectable via SPI control I F Analog Gain Selectable 0 20 18 16 12 2 4 8 dB Notes Unless
114. input signal level suddenly increases a limiter allows the output signal level to also increase but only up to the threshold setting and not beyond Desirable sound effects can sometimes be created if a limiter is forced to ramp the output signal level to its new value gradually rather than instantaneously The Attack Time control adjusts the duration of this ramp Attack Time is adjustable in the range 20 uSec one sample to 50 mSec 10 July 1998 Release Time A limiter monitors the level of the input signal and controls the level of the output signal accordingly When the input signal level suddenly decreases a limiter allows the output signal level to also decrease only as much as is appropriate given the relationship between the new input signal level and the threshold setting A limiter generally sounds better if it is forced to ramp the output signal level to its new value gradually rather than instantaneously The Release Time control adjusts the duration of this ramp Release Time is adjustable in the range 20 uSec one sample to 5 Sec Knee Selection Below the threshold level no limiting is applied and any changes in input level are matched exactly by changes in output level Above the threshold level limiting is applied and changes in the output level are not allowed regardless of the input level The transition from no limiting to limiting can be set to take place abruptly or gradually Under hard knee con
115. ion herein these changes will be incorporated in new editions of the publication TELEX Communications may make improvements and or changes in the product s and or program s described in this publication at any time TRADEMARKS VUE IT and Virtual User Environmental for InterActive Technology are trademarks of TELEX Communications Windows Windows 3 1 Windows 3 11 Windows 95 and MS DOSS are all trademarks of Microsoft Corporation Names of other products mentioned herein are used for identification purposes only and may be trademarks and or registered trademarks of their respective companies UNPACKING AND INSPECTION Immediately upon receipt of the equipment inspect the shipping container and the contents carefully for any discrepancies or damage Should there be any notify the freight company and the dealer at once WARRANTY INFORMATION Merlin products are warranted by Telex Communications Inc to be free from defects in materials and workmanship for a period of three years from the date of sale The sole obligation of Telex during the warranty period is to provide without charge parts and labor necessary to remedy covered defects appearing in products returned prepaid to Telex This warranty does not cover any defect malfunction or failure caused beyond the control of Telex including unreasonable or negligent operation abuse accident failure to follow instructions in the manual defective or improper associated e
116. itz Riley lowpass filter types The cutoff frequency is defined as the frequency at which the magnitude of the filter response has fallen to 3 dB relative to the unfiltered signal in the Bessel and Butterworth types and to 6 dB in the Linkwitz Riley types In the ISP 100 lowpass filters the cutoff frequency is continuously variable from 20Hz to 20 kHz In the ISP 100 lowpass filters the passband slope is selectable from 6 dB octave to 12 dB octave for the Bessel and Butterworth types NOTE Linkwitz Riley filters are also known as Butterworth Squared filters because they are the product of two Butterworth filters A 12 dB octave Linkwitz Riley lowpass filter may be constructed by cascading two identical 6 dB octave Butterworth lowpass filters a 24 dB octave Linkwitz Riley lowpass filter may be constructed by cascading two identical 12 dB octave Butterworth lowpass filters HighPass Filters HighPass Filters pass high frequencies and stop low frequencies Since it is not realistically possible to create a perfect filter that passes high frequencies totally unaltered and stops low frequencies completely highpass filter design involves compromises that allow some rounding of the corner at the filter cutoff frequency and some slope in the transition to the low frequency stopband Different compromise schemes are given different names the ISP 100 incorporates Bessel Butterworth and Linkwitz Riley lowpass filter types The cutof
117. keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Fine or Coarse Control This button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the button will toggle the setting Polarity Control This button determines the polarity of the signal A indicates that the signal will not have it s phase altered A indicates that the signal s phase will be changed 180 Clicking on the button will toggle the setting Mute Control This button determines if the input signal will be muted A gray LED indicates that the signal is not muted while a red LED indicates that the signal is muted Clicking on the button will toggle the setting Pre Fader Metering PFM This button determines if the meter is getting its data pre or post fader A gray LED indicates that
118. l not have it s phase altered A indicates that the signal s phase will be changed 180 Clicking on the button will toggle the setting Mute Control M This button determines if the input signal will be muted A black M indicates that the signal is not muted while a red M indicates that the signal is muted Clicking on the button will toggle the setting Bypass Control master This button determines if the component is in the processing chain If the LED on the button is gray then the component is inserted into the signal processing chain If the LED is red then the component is bypassed in the signal processing chain A bypassed component will be colored red in the QuickMAP Processing Components Combine EN B Compressor Compress 1B Increment Knee Har Ratio 121 gt Sidechain d Release Crest Max of Both Figure 8 2 Compressor component 9 02 Attack Window F m Threshol A compressor see Figure 8 2 is used in situations where the input signal has a greater dynamic range or ratio of loudest to softest than is desired in the output signal Compression is accomplished by preventing the output signal from changing in level as much as the input signal and can be thought of as a form of automatic gain riding Familiar Controls Most of the controls in the ISP 100 Compressor are common to nearly all traditional dynamic range c
119. lected as the clock master if the SRC is turned on Off indicates that the sample rate conversion option is not selected on the card Input Stream Format Pro indicates that the digital receiver has detected an AES EBU formatted data stream Consumer indicates that the digital receiver has detected an SPDIF formatted data stream Input Stream Emphasis Emphasis indicates that the sending device has added emphasis to the incoming data stream None indicates that the sending device has not emphasized the incoming data stream Input Sample Rate Indicates the sample rate of the data stream in kHz There are three possible frequencies 48 0 kHz 44 1 kHz and 32 0 kHz All other frequencies above and below these are listed as Out of Range Note The emphasis information in the output data stream will be set to no emphasis regardless of the input emphasis status 10 July 1998 ooo Device Status Panel Device Status e e e Clock Digital Low Input Process Sync Data Battery Clip Clip p Figure 7 23 Device status panel Clicking on the entry next to the star icon see Figure 7 9 and then clicking on the Design button in the Project Manager opens the Device Status Panel See Figure 7 23 The device status panel has five simulated LEDs Clock Sync red The main board cannot lock to specified location or frequency Digital Data red 1 Data validity error Card position dependent 2 Anon
120. llent transient response Their amplitude response is not as flat and their cutoff is not as sharp as those of Butterworth filters Butterworth crossovers utilize Butterworth filters Butterworth filters are designed for maximally flat amplitude response meaning that the amplitude response in the passband is as flat as possible without ripple Their phase response is not nearly as linear and their transient response is not as good as those of Bessel filters The Bessel filters used in the ISP 100 crossovers are automatically scaled so that their amplitude response is 3 dB at the selected cutoff frequency regardless of the filter order The amplitude response of a Butterworth filter is naturally 3 dB at the selected cutoff frequency regardless of the filter order 10 July 1998 Four way Linkwitz Riley Crossovers HP uu input Figure 8 10 Four way Linkwitz Riley crossover implementation In the ISP 100 4 way Linkwitz Riley crossovers are implemented as shown in Figure 8 10 Linkwitz Riley designs constitute a special even order in phase class of 2 way sum to allpass response crossovers and they must be configured in accordance with very strict phase and polarity requirements Because the basic Linkwitz Riley crossover is a 2 way design extra steps must be taken in 4 way Linkwitz Riley crossovers to ensure that these phase and polarity requirements are met Note the presence of the unexpected allpass fil
121. m in descending order See section 6 for the location of the QuicKMAP directory QuickMAP Properties QuickMAP Properties Properties QuickMAP Name QuickMAP Model 4 Inputs 6 Outputs Company Name MERLIN Designer Lary Benedict Created 3 30 1998 at 14 43 41 Modified 3 30 1998 at 14 43 41 User Notes Labels Inputs Outputs Cancel Figure 7 12 QuickMAP properties dialog QuickMAP Properties see Figure 7 13 appear by clicking on the QuickMAP entry in the Project Manager and then clicking on the Properties button From this dialog you can change the Quick MAP name You can also change the names of the input and output labels by clicking on either the Inputs or Outputs buttons Component Properties Component Properties x Properties Comp Name Comp Type Gain Company Name MERLIN Designer Lary Benedict Created 3 30 1998 at 14 43 41 Modified 3 30 1998 at 14 43 41 User Notes Cancel Figure 7 14 Component properties dialog 10 July 1998 Clicking on a component i e Cut Compressor Limiter etc in the Project Manager see Figure 7 9 and then clicking on the Properties button displays the properties for the selected component Component Properties allow the user to name the component and enter notes related to that component See Figure 7 14 Component Export Export Component B Component File Name Component Properties Filters c
122. me and increase your profit This single rack space unit can replace a multitude of traditional analog components Time and money savings are realized in reduced labor costs for wire harnessing rack size assembly and minimized failure due to reduced interconnection As a result of this consolidation of processing overall system performance and audio integrity is greatly increased An ergonomically designed software interface called VUE IT provides graphic control panels with the conventional look of signal processors as well as an advanced and easy to use filter tool panel which graphically displays the configuration of your filter block settings One of the most impressive and unique features of the ISP 100 is the configurable input output I O This feature allows the designer or installer to select between analog input or output modules and or a digital input output combination module These modules are two channel units and can be intermixed between analog and digital thus providing a variety of I O combinations The ISP 100 supports a maximum of four inputs and eight outputs The inputs and outputs can be either analog digital or a combination of both Because of our commitment to providing the utmost in audio quality the dynamic range of the ISP 100 rivals anything currently on the market The ISP 100 has a typical noise floor of 110 dBu and a typical THD N of 0 00495 Propagation time is minimized in the ISP 100 No mor
123. me rounding of the corner at the filter hinge frequency and some slope in the transition to the unaltered low frequencies Processing Components Filter EA gt The hinge frequency is defined as the frequency at which the magnitude of the filter response is changed by approximately 3 dB relative to the unfiltered signal In the ISP 100 highshelf filters the hinge frequency is continuously variable from 20Hz to 20 kHz In the ISP 100 highshelf filters the transition band slope is selectable from 6 dB octave and 12 dB octave In the ISP 100 highshelf filters the boost cut is continuously variable from 12 dB to 12 dB NOTE When a highshelf filter with boost is selected the expected filter frequency response is characterized by boosted high frequencies and unaltered low frequencies In the ISP 100 this filter will exhibit unaltered response at high frequencies and cut response at low frequencies The shape of the frequency response will be exactly as expected but the level of the response will be shifted downward by an amount exactly equal to the selected boost quantity This is necessary to prevent numerical overflow problems in the DSP filter coefficients and represents normal operation for the highshelf filter Notch Filters Notch Filters pass all frequencies except for the notch frequency which they stop completely Since it is not realistically possible to create a perfect filter that stops one frequency completely and pass
124. mp INSTALLATION Introduction This section details the setup and installation of the MERLIN ISP 100 Information is provided on the following front and rear panel features physical requirements installation of expansion cards signal connections for audio data and control Unpacking The shipping carton is specially designed to protect the ISP 100 while transporting under normal conditions It is still possible for damage to occur Therefore carefully inspect the outside carton for signs of abuse If for any reason the ISP 100 should need to be returned use the shipping carton that it came in TELEX Communications Inc cannot warranty against damage that occurs as a result of improper packaging The shipping box should contain the following items ISP 100 User s Manual VUE IT Software Package Spare Fuses 2 Label Paper IEC Power Cord Front Panel Features see Figure 2 1 Figure 2 1 SP 100 front panel features 1 Label Holder Provides a space to indicate the assignments of the input and output modules 2 Status LEDs Provides power on off low battery module presence signal clipping and host communication status 3 RS 232 Port Links the PC to the unit via a DB 9 female connector 4 RS 232 Selector Selects between the front panel DB 9 port and the rear panel RJ 45 port Placing the switch in the down position selects the DB 9 port located on the front of the unit Placing the switch in the up position
125. n is taking place and changes in output level are less than the corresponding changes in input level The transition from no compression to compression can be set to take place abruptly or gradually Under hard knee conditions the output level tracks the input level perfectly as it rises up to the threshold Above the threshold the output level continues to rise as dictated by the compression ratio There is an abrupt transition from no compression below the threshold to compression above Under soft knee conditions there is a smooth gradual transition from no compression below the threshold to compression above Under soft knee conditions the output level and the input level track until approximately 12 18 dB below the threshold beyond which they slowly begin to diverge Depending upon the compression ratio selected the output level may be as much as Processing Components Compressor EN A M A h 2 5 dB below the input level at the threshold The divergence continues to increase gradually until approximately 6 dB above the threshold beyond which the output level rise is dictated solely by the selected compression ratio There is a smooth gradual transition from no compression below the threshold to compression above The sonic differences between the two knee types are often subtle and are very much signal dependent Experimentation is recommended Sidechain Source There are situations in which compr
126. o reduce risk of fire replace before changing the only with same type fuse The fuse holder is located under the security fuse Failure to do so cover on the front panel could result in a shock hazard The fuse is a standard 20mm X 5mm European type The values used are as follows All countries using 220 240 VAC except Australia use 1 2 A slow blow WARNING fuse Failure to install the proper fuse could Schurter P N 0001 2501 result in damage to the Telex P N 51 04 052488 unit property and loss of life All countries using 100 120 VAC and Australia use a 1 A slow blow fuse Schurter P N 0001 2504 Telex P N 51 04 051487 Changing the Battery Figure 3 3 Battery module removal tool The memory backup battery located under the security cover on the front Leave the AC power panel has an expected life of four years If the Host LED is blinking the connected and the battery needs to be changed ISP 100 turned on when changing a CAUTION The battery used in this device may present a risk of fire or failed battery chemical burn if mistreated Do not recharge disassemble heat above Failure to do will 212 F 100 C or incinerate Replace battery with Renata CR2450N or result in loss of MERLIN 40 02 052055 only Use of another battery may present arisk of fire or explosion Be sure to change the battery with the unit on If the unit is turned off all of the setup information stored in the
127. octave filter is used for LP and then the low mid band must be in phase with the low band If a 24 dB octave filter is used for LP and HP then the high band must be the in phase with the mid high band And if a 24 dB octave filter is used for LP and then the mid high band must be the in phase with the low band not the low mid band Sum to Allpass Characteristics of Linkwitz Riley Crossovers A characteristic of 2 way Linkwitz Riley crossovers is that the output bands sum to an allpass filter the frequency response of the sum has a constant magnitude of one and only phase shift occurs From Figure 8 4 this means that LP HP 0 or LP HP 0 10 July 1998 depending upon whether 12 dB octave or 24 dB octave filters are used respectively The following sections will show this sum to allpass trait to hold true for the ISP 100 Linkwitz Riley 3 way and 4 way crossover implementations Three way From Figure 8 6 Summed Response LP LP HP LP LP HP LP 0 There is an alternate configuration not implemented in the ISP 100 that also has this property Summed Response LP 0 HP LP 12 6 twan LP 9 HP 6 LP HP 6 6 0 Q E D Four way From Figure 8 9 Summed Response LP LP 6 HP LP 0 0 HP LP 6 HP HP 23 237 LP HP LP 6 6 HP LP HP 0 LP 0 6 6 LP HP 6 0 0 Q
128. oltage 90 264 VAC 50 60 Hz 35 W Maximum Internal Power Supply Sync Frequency 153 6 kHz 10 July 1998 EM INSTALLING VUE IT Minimum System Requirements 3 CPU Pentium processor VUE IT ie currently OS Microsoft Windows 3 1x Windows 95 or Windows 98 not available for Memory 8MB RAM Windows NT Hard Drive 5MB of available space beyond swap file needs Disk Drive 3 5 inch high density Monitor 640X480 256 color Pointing Device mouse or other Windows compatible pointing device Communications free COM port 1 4 with 16550 UART Identifying a Serial Port The ISP 100 requires a serial port to communicate with the PC You must determine if you have a free 16550 serial port on the PC you intend to use with the ISP 100 You can do this by looking at the back of the computer for an empty 9 pin D sub male DB 9 or a 25 pin D sub male DB 25 connector If you are unable to find an available serial port then you must either disconnect a device from one of the ports that is currently being used or install an additional serial port If you are unfamiliar with this please contact your local computer dealer for assistance NOTE may be necessary to remove device drivers attached to serial ports in Windows 95 A good example of this would be a device driver for an external modem This will eliminate the possibility of a software wd conflict between the VUE IT software and other device drivers
129. ompressors These controls should be familiar to anyone with experience in the operation of any compressor Compression Ratio The Compression Ratio control adjusts the amount by which the output signal level changes for a given change in input signal level When compressing the output level change in dB will be equal to the input level change in dB divided by the compression ratio input level change compression ratio For example if the compression ratio is 2 1 and the input level changes by 10 then output level change input level change _ 10 dB compression ratio 2 Any compressor is essentially a limiter once the compression ratio is increased beyond approximately 6 1 output level change 5 Compression Ratio is selectable from 1 2 1 1 5 1 2 1 3 1 4 1 6 1 8 1 12 1 16 1 24 1 though any compressor is essentially a limiter once the compression ratio is increased beyond approximately 6 1 Threshold The Threshold control adjusts the input signal level above which compression is used When the input signal level is below the 10 July 1998 threshold value no compression takes place and the change in level of the output signal exactly matches the change in level of the input signal When the input signal level is above the threshold value compression is used and the change in level of the output signal is less than the change in level of the input signal by the amount dictated by th
130. on and polarity in the low band the mid band and the high band may be independently adjusted and all of the filters in any band may be bypassed entirely The cutoff frequency in each filter is continuously variable from 20 Hz to 20 kHz The attenuation in each band is continuously variable from 96 dB to 0 dB plus mute The polarity in each band is selectable as or in phase or out of phase Each band may be bypassed in which case all of the crossover filters in that band will be bypassed while the crossover filters in the other bands will not be affected Three way Bessel and Butterworth Crossovers input Figure 8 6 Three way Bessel amp butterworth crossover implementation 10 July 1998 gt In the ISP 100 3 way Bessel Butterworth crossovers implemented as shown in Figure 8 6 Bessel crossovers utilize Bessel filters Bessel filters are designed for maximally flat group delay meaning that they have nearly linear phase and excellent transient response Their amplitude response is not as flat and their cutoff is not as sharp as those of Butterworth filters Butterworth crossovers utilize Butterworth filters Butterworth filters are designed for maximally flat amplitude response meaning that the amplitude response in the passband is as flat as possible without ripple Their phase response is not nearly as linear and their transient response is not as good as those of Bessel filters Th
131. on allows the user to toggle between viewing either the composite response of all active filters in the filter bank or the composite response of an individual filter Clicking on the button will toggle the setting Polarity Control This button determines the polarity of the signal A indicates that the signal will not have it s phase altered A indicates that the signal s phase will be changed 180 Clicking on the button will toggle the setting 10 July 1998 Gain Increment s Figure 8 17 Gain component Gain see Figure 8 17 is the first function applied to all ISP 100 input data The gain component performs many operations including metering of raw input data pre fader application of up to 18 dB gain 96 dB attenuation or full muting metering of data after the level has been changed post fader and polarity inversion Metering Gain includes peak reading meters The meters show the amplitude of the individual digital samples having the largest absolute value The meters are graduated in dB and referenced to digital clipping dBFS dB relative to Full Scale Because of their peak reading nature gain meters are not useful for monitoring average signal levels as the peak level of a signal can exceed its average by a tremendous amount The advantage of true peak indicating meters in a digital signal processor like the ISP 100 lies in their ability to indicate digital clipping Regardless of the avera
132. on will toggle the setting Knee Control This button determines the type of transition that occurs when the component goes from inactive to active A Hard knee causes the response by the component to be abrupt while a Soft knee causes a gentle response Clicking on the button will toggle the setting Bypass Control master This button determines if the component is in the processing chain If the LED on the button is gray then the component is inserted into the signal processing chain If the LED is red then the component is bypassed in the signal processing chain A bypassed component will be colored red in the QuickMAP Processing Components Limiter EA 35 Select Select the desired input source Input 1 Gain 14 Input 2 Gain 1B Input 3 Gain 24 Figure 8 20 Select component The select function see Figure 8 20 allows you to set the source that feeds portions of a QuickMAP The user is allowed to select from as many inputs as the QuickMAP allows An entire QuickMAP can be fed from a single source or multiple sources depending on the settings of the Selects within the QuickMAP Note The amount of available sources is determined by the Quick MAP and not the hardware configuration For example A particular QuickMAP has three source selects in it This will require two input cards The user is only able to select from three inputs as determined by the QuickMAP even though two input cards provide
133. onent presets are stored To modify the path click on the Modify button located to the right of the directory path entry 10 July 1998 _ _ QuickMAP Library This is the directory under which QuickMAP templates are stored To modify the path click on the Modify button located to the right of the directory path entry Company Name This entry is reserved for possible future use in documenting projects You can enter the company name but it currently will not be saved in a project Designer s Name This entry is reserved for possible future use in documenting projects You can enter your name here but it currently will not be saved in a project Communications This list allows you to select which COM port 1 4 and offline on the PC will be used for communications with the ISP 100 Once a new COM port is selected you may need to select Scan from the Tools menu in order for the software to identify an ISP 100 connected to the new COM port Default Preference This list is reserved for future program expansion Via this list you would be able to change settings based on a designer s preferences This would allow for multiple designers using the same program on the same PC Project Manager Main Device 1 0 Slots QuickMAPs EFS Mono3w Gain 14 4 Gain 1B Properties Gain 24 Select 54 Select 5B Select 24 Filter 24 Cut 54 Cut 5B Figure 7 9 Project manager dialog The P
134. order and the second click will sort them in descending order If you select the Upload from ISP 100 option there will be a pause while the QuickMAP in the ISP 100 is loaded Using the Upload from ISP 100 option is a good way to retrieve the settings of an ISP 100 when the original project file does not exist Please note that this feature is NOT backward compatible An ISP 100 with a project created using a previous version of VUE IT will NOT be able to upload the project to your computer File Edit Tools Options Window Help p Gain Select Filters Delay 2XOvery Filters Delay Limiter Dith Filters Delay Limiter Dith p Gain Select Filters Delay Limiter Dith Filters Delay Limiter Dith p Gain Select Filters Delay 3XOvert Filters Delay Limiter Dith Filters Delay Limiter Dith Ww Online Figure 6 4 New project created After the QuickMAP has been created three panels will appear on the screen They are Project Manager QuickSET Manager and QuickMAP See Figure 6 4 VUE IT File System When anew project is created a number of files and directories are created By default the directory structure used by VUE IT projects is as follows C PROGRAM FILES VUE IT ISP 100 PROJECTS lt Directory Name gt lt File Name gt lt Extension gt The files created by a new project are stored in the project directory The file names are t
135. oth or depends n a n a sidechain Filters Property Range Default Fine Coarse Bypass in out out n a n a Absolute Polarity n a n a Gain Trim 12 dB to 12 dB 0 dB 1 dB 1dB LowPass Filter Property Range Default Fine Coarse Slope 6 12 12 n a n a Cutoff Frequency 20 Hz to 20 kHz 20 11206 1 3 Class Bessel Butterworth Butterworth n a n a or Linkwitz Riley HighPass Filter Property Range Default Fine Coarse Slope 6 12 12 n a n a Cutoff Frequency 20 Hz to 20 kHz 20 11206 1 3 Class Bessel Butterworth Butterworth n a n a or Linkwitz Riley AllPass Filter Property Range Default Fine Coarse Cutoff Frequency 20 Hz to 20 kHz 20 1 12 1 3Oct Filter Order 1 2 2 n a n a LowShelf Filter Property Range Default Fine Coarse Slope 6 12 12 n a n a Cutoff Frequency 20 Hz to 20k Hz 20 1 12 Oct 1 3 Oct Boost Cut 12 dB to 12 dB 0 dB 1 dB 1dB HighShelf Filter Property Range Default Fine Coarse Slope 6 12 12 n a n a Cutoff Frequency 20 Hz to 20 kHz 20 11206 1 3 Boost Cut 12 dB to 12 dB 0 dB 1 dB 1dB Notch Filter Property Range Default Fine Coarse Center Frequency 20 Hz to 20 kHz 20 11206 1 3 Oct Cut 0 dB to 50dB 0 dB 1dB 6 dB Bandwidth 08 to 1 0 octaves 1 0 01 Oct 1 Oct 10 July 1998 _ PEQ Property Range Default Fine Coarse Center Frequency 20 Hz to 20 kHz 20 1 12 Oct 1 3 Oct Boost Cut 12 dB to 12 dB 0 dB 1dB Bandwidth 0 08 to 3 0 octaves 1 0 1 12Oct 1 3 Oct Combine
136. otherwise specified measurements are at unity gain with 16 dBu signal A Unity gain SMPTE 4 1 60 Hz amp 7 kHz sine waves Unity gain DIM30 4 1 3 15 kHz SQ wave amp 15 kHz sine wave 30 kHz LPF 1 Power spectral density Group Delay inherent in conversion process 5 1 5 20 dB pad engaged Maximum levels are differential and balanced Limit set by protection circuit Relative to unity gain 1 kHz Electronically balanced RF surpressed differential impedance 20 20kHz Maximum dimensions dominated by panel size for height and width MIM 2 differences parenthetically noted 10 July 1998 ee MOM 1 Analog Output Module Power Symbol Description Minimum Typical VA18P positive analog supply voltage 17 50 18 00 VA18M negative analog supply voltage 17 50 18 00 VD5P positive digital supply voltage 4 75 5 00 18 positive analog supply current 92 96 1 18 negative analog supply current 47 51 ID5P positive digital supply current 114 124 Performance Symbol Description Minimum Typical THD N Total Harmonic Distortion Noise 0 003 IMD Intermodulation Distortion 0 004 DIM Dynamic Intermodulation Distortion 0 003 Noise Floor 110 Channel Crosstalk 100 N Resolution 20 Frequency Response 0 1 0 5 Delay 25 MCLK Master Clock 12 283 12 288 WST Word Clock 47 98 48 000 Oversampling 128X Stopband Attenuation 15 Maximum Output Level 21 26 Interchannel Phase Deviation 0 5 Output Balance 0 5 Gain Accura
137. ow after it has been closed This function only works when one or more components are open Exit Shuts the program down The last eight projects used are listed at the bottom of the menu if the Most Recently Used files MRU option is checked in the Preferences panel under the Options Menu If the project no longer exists you are asked if you want to remove the item from the list Using VUE IT Edit see Figure 7 2 WUE IT for MERLIN ISP 100 c progra 1 File 2 Tools Options Window Help Undo 20152 Ctlex Copy Ctrl C Paste Ctrl V Figure 7 2 Edit menu Cut Removes the selected item s and places them on the clipboard Copy Places a copy of the selected item s on the clipboard Pasie Inserts item s from the clipboard Tools see Figure 7 3 YUE IT for MERLIN ISP 100 c prog File Edi Options Window Help fa Refresh Directories Scan Figure 7 3 Tools menu Refresh Directories Updates the directory list for QuicKMAP and component library files Scan Looks to see if an ISP 100 is connected to the computer Options see Figure 7 4 VUE IT for MERLIN ISP 100 c progra 1Nvue itSisp 10 File Edit Tools Window Help BMAF gt Preferences System Configurations Figure 7 4 Options menu Preferences Allows the user to setup preferences available within VUE IT System Configurations Allows the user to setup proje
138. owpass band Summarizing In a 2 way 12 dB octave Linkwitz Riley crossover the high band must be out of phase with the low band in a 2 way 24 dB octave Linkwitz Riley crossover the high band must be in phase with the low band Three Way Crossovers high mid input LP low optional Figure 8 5 Three way crossover implementation In the ISP 100 3 way crossovers are implemented as shown in Figure 8 5 This parallel structure was selected over the more common binary tree structure for its suitability to the distribution of filters among multiple DSPs The parallel structure is also capable of perfect Processing Components Crossover implementation of Linkwitz Riley crossovers for which the ISP 100 has been optimized The filters marked optional in Figure 8 5 will be explained in the Linkwitz Riley Crossover section below The lowpass filters LP except for the optional LP and the highpass filters HP may each be independently configured as Bessel 6 dB octave 1 order Bessel 12 dB octave 2 9 Bessel 18 dB octave 3 Bessel 24 dB octave 4 order Butterworth 6 dB octave 1 Butterworth 12 dB octave 2 order Butterworth 18 dB octave 39 Butterworth 24 dB octave 4 order Linkwitz Riley Butterworth Squared 12 dB octave 2 9 Linkwitz Riley Butterworth Squared 24 dB octave 4 In addition the cutoff frequency attenuati
139. peration of the Software will meet your requirements or operate free from error THE COMPANY DISCLAIMS ALL OTHER WARRANTIES AND CONDITIONS EITHER EXPRESSED OR IMPLIED INCLUDING THE WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT OF THIRD PARTY RIGHTS 4 Limited Liability The liability of the Company for any claims arising out of this License based upon the Software regardless of the form of action shall not exceed the greater of the license fee for the Software or 50 General Information 5 INTRODUCTION 1 1 An Overview of the ISP 100 1 1 Aboutihis eter 1 2 Customer SUPPO 1 2 Conventions Used in this 1 2 SETUP amp 2 1 1 Mr 2 1 i Fe Ue Meet MODE 2 1 Front Panel Tm 2 1 Rear Panel eB aa T o eee ee 2 2 xv dica 2 2 Operating oi i Pup indiens 2 2 Rack MENTRE 2 2 P ODBULIFO 22
140. phase response is not nearly as linear and their transient response is not as good as those of Bessel filters The Bessel filters used in the ISP 100 crossovers are automatically scaled so that their amplitude response is 3 dB at the selected cutoff frequency regardless of the filter order The amplitude response of a Butterworth filter is naturally 3 dB at the selected cutoff frequency regardless of the filter order 10 July 1998 ooo Two way Linkwitz Riley Crossovers Linkwitz Riley designs constitute a special even order in phase class of two way sum to allpass response crossovers and they must be configured in accordance with very strict phase and polarity requirements A properly implemented 2 way 12 dB octave Linkwitz Riley crossover is characterized by 219 Linkwitz Riley Butterworth Squared lowpass filter 6 dB magnitude response at crossover frequency 278 Linkwitz Riley Butterworth Squared highpass filter 6 dB magnitude response at crossover frequency polarity of highpass band opposite that of lowpass band A properly implemented 2 way 24 dB octave Linkwitz Riley crossover is characterized by 4 Linkwitz Riley Butterworth Squared lowpass filter 6 dB magnitude response at crossover frequency e 4 order Linkwitz Riley Butterworth Squared highpass filter 6 dB magnitude response at crossover frequency polarity of highpass band the same as that of l
141. quipment attempts at modification and repair not authorized by Telex and shipping damage Products with their serial numbers removed or effaced are not covered by this warranty To obtain warranty service follow the procedures entitled Procedure for Returns and Shipping to Manufacturer for Repair or Adjustment This warranty is the sole and exclusive express warranty given with respect to Merlin products It is the responsibility of the user to determine before purchase that this product is suitable for the user s intended purpose General Information hh h Mh 31 ANY AND ALL IMPLIED WARRANTIES INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY ARE LIMITED TO THE DURATION OF THIS EXPRESS LIMITED WARRANTY NEITHER TELEX NOR THE DEALER WHO SELLS MERLIN PRODUCTS IS LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY KIND CUSTOMER SUPPORT Technical questions should be directed to Customer Service Department Merlin Telex 9600 Aldrich Avenue South Minneapolis MN 55420 U S A Telephone 612 884 4051 Fax 612 884 0043 RETURN SHIPPING INSTRUCTIONS Procedure for Returns If a repair is necessary contact the dealer where this unit was purchased If repair through the dealer is not possible obtain a RETURN AUTHORIZATION from Customer Service Department Telex Communications Inc Telephone 1 800 828 6107 or 612 884 4051 extension 425 or 420 Fax 1 800 323 0498 or 612 884 0043 DO NOT
142. r will be returned if either slot 1 or slot 2 is selected as the clock master while the slot contains a card configured to use the sample rate converter SRC The default clock master is the main board If the user places an AES EBU card in an input slot the user can manually change the clock master to select either the main external sync or input card slot Input Slot Bit Level The input slot bit level can be set to either 20 bit or 24 bit 20 bit is usually associated with consumer grade SPDIF digital audio 24 bit is usually associated with professional grade AES EBU digital audio However it is possible to have consumer grade 24 bit digital audio For optimal performance be sure to set the proper bit level for the audio data stream 10 July 1998 Project Properties Properties Project Name test Project Site Company Name MERLIN Designer Larry Benedict User Notes Cancel Figure 7 11 Project properties dialog Project properties see Figure 7 11 provides the user with information on the name of the project project location and notes related to the project It is accessed by double clicking on the project name entry or by clicking on the project name entry and then clicking on the Properties button in the Project Manager QuickMAP Selection A QuickMAP is a QuickMAP Selection Signal processing Name _ 00 Configuration Create Time _ ModTme topology used with 4 inputs
143. raditional limiter responding to average signal levels when the Crest Factor Sensitivity is set to 1 00 the ISP 100 limiter operates as a traditional limiter responding to peak signal levels Values in between represent various hybrids of the two If the limiter is to ignore peaks and respond only to average levels then the Crest Factor Sensitivity may be set near zero If the limiter is to respond only to peaks then the Crest Factor Sensitivity may be set near one Good results may be obtained by following these steps 1 Set the Crest Factor Sensitivity to 0 00 This will cause the ISP 100 limiter to behave like a traditional limiter responding to average signal levels 2 Set all of the other limiter controls as appropriate for the signal being limited just as they would be set in a traditional limiter 3 Adjust the Crest Factor Sensitivity control so that the limiter responds appropriately to short signal peaks If it were possible to know in advance what the crest factor of the input signal was going to be then the Crest Factor Sensitivity control would ideally be set to 1 the crest factor of the input signal Since this quantity is not generally known it is best to experiment until satisfactory results are obtained Metering The limiter meter shows the attenuation applied to the signal passing through the limiter at any given moment in time When the signal is being limited the meter indicates negative values gain less
144. rease the overall level of a signal A circuit whose output voltage is fixed at a value for all input voltages higher than a predetermined value Clippers can flat top the positive negative or both positive and negative peaks of an input voltage 1 Leveling off flat topping a signal peak at a predetermined level Also see CLIPPER 2 In audio practice the loss of syllables or words because of cutoff periods in the operation of the circuit usually caused by overdriving a stage To reduce the bandwidth or dynamic range of a signal 1 The reduction of output signal amplitude as input signal amplitude rises 2 Processing of a signal to increase low level components and thereby raise the average power level Usually a logarithmic function a system containing compression the ratio A A where A is the gain at a reference signal level and A is the gain at a specified higher signal level A circuit or device which limits the amplitude of its output signal to a predetermined value in spite of wide variations in input signal amplitude Unlike a CLIPPER a compressor does not flat top output signal peaks For an AC wave the ratio of the peak value to the rms value The crest factor of a sine wave is equal to the square root of 2 or 1 4142126 Glossary Cut Dto A dBFS reaches dBm dBr dBu dBV Delay Dither DSP Filter Filter attenuation Filter attenuation band Filter cutoff Filter pass ban
145. requencies The hinge frequency is defined as the frequency at which the magnitude of the filter response is changed by approximately 3 dB relative to the unfiltered signal In the ISP 100 lowshelf filters the hinge frequency is continuously variable from 20Hz to 20 kHz In the ISP 100 lowshelf filters the transition band slope is selectable from 6 dB octave and 12 dB octave In the ISP 100 lowshelf filters the boost cut is continuously variable from 12 dB to 12 dB NOTE When a lowshelf filter with boost is selected the expected filter frequency response is characterized by boosted low frequencies and unaltered high frequencies In the ISP 100 this filter will exhibit unaltered response at low frequencies and cut response at high frequencies The shape of the frequency response will be exactly as expected but the level of the response will be shifted downward by an amount exactly equal to the selected boost quantity This is necessary to prevent numerical overflow problems in the DSP filter coefficients and represents normal operation for the lowshelf filter HighShelf Filters HighShelf Filters raise or lower the magnitude response at frequencies above the hinge frequency without altering the response at frequencies below the hinge frequency Since it is not realistically possible to create a perfect filter that alters only high frequencies without affecting low frequencies highshelf filter design involves compromises that allow so
146. roject Manager see Figure 7 9 contains information related to the project design Via the manager the user is able to define GPI inputs configure inputs and outputs import and export component settings and adjust component settings In addition to these functions the user is also Using VUE IT EN A Aw A 3 MhB able to access ISP 100 statistics such as free memory number of QuickSETs etc Properties for the ISP 100 Properties Device Name Free Device Memory 882 Serial Number 19600019 C Number of QuickSET s 1 Created 3 25 1998 at 09 20 15 Modified 3 30 1998 at 14 54 23 Master Clock Selection 10 Configuration Internal Motherboard Inputs 14 0 Input Slot Bit Level 20Bits 24Bits Digital 120 1 AES EBU Cancel Figure 7 10 ISP 100 properties dialog Properties for the ISP 100 see Figure 7 10 reports statistics on the ISP 100 It is accessed by double clicking on the entry next to the star icon see Figure 7 9 or by clicking on the entry next to the star icon see Figure 7 9 and then clicking on the Properties button in the Project Manager Master Clock Selection There are four location selections for master clock 1 Main Board no reference frequency default 2 Slot 1 12 288 MHz reference frequency AES EBU only 3 Slot 2 12 288 MHz reference frequency AES EBU only 4 External Reference 12 288 6 144 or 3 072 MHz via external input BNC An erro
147. s n a n a sidechain Crossover Property Range Default Fine Coarse Slope 6 12 18 24 12 n a n a Class Bessel Butterworth Butterworth n a n a or Linkwitz Riley Cutoff Frequency 20 Hz to 20 kHz Depends 11206 1 3 0 dB to 96 dB 0 dB 0 5 dB Absolute Polarity n a n a Delay Property Range Default Fine Coarse Delay 0 0 2 7 5 0 ms 02 ms 1 ms Dither Property Range Default Fine Coarse Bypass in out out n a n a Level 16 to 24 bits 20 bits 1 bit 1 bit Gain Property Range Default Fine Coarse Input Gain 18 dB to 96 dB 0 dB 0 5 dB 1dB Mute on off off n a n a Absolute Polarity n a n a Gate Property Range Default Fine Coarse Bypass in out out n a n a Threshold 60 dB to 0 dB 60 dB 5 dB 3dB Attenuation Od B to 100 dB 0 dB 5 dB dB Attack Time 20 msec to 50 ms 02 02 ms 1 ms Release Time 20 msec to 5 sec 5000 ms 1 ms 100 ms Detection Window 20 msec to 5 sec 50 ms 1ms 100 ms Key Channel self max of both or depends n a n a sidechain Depends on QuickMAP selected n digital domain Specifications h Limiter Property Range Default Fine Coarse Bypass in out out n a n a Threshold 60 dB to 0 dB 0 dB 5 dB 3 Attack Time 20 msec to 50 ms 02 ms 02 ms 1 ms Release Time 20 msec to 5 sec 5000 ms 1ms 100 ms Detection Window 20 msec to 5 sec 50 ms 1ms 100 ms Crest Factor 0 00 to 1 00 70 01 05 Knee hard soft hard n a n a Sidechain Channel self max of b
148. ssing Components Gate 8 46 Limiter Increment 0 02 Attack Window Hard Sidechain 111 Threshold Release Crest 4 Figure 8 19 Limiter component A limiter see Figure 8 18 is used in situations where the output signal must not exceed a given level regardless of any increase in the level of the input signal Limiting is often used for system protection purposes such as the avoidance of amplifier clipping or the prevention of mechanical or thermal damage to loudspeaker components Familiar Controls Most of the controls in the ISP 100 Limiter are common to nearly all traditional dynamic range limiters These controls should be familiar to anyone with experience in the operation of any limiter Threshold The Threshold control adjusts the input signal level above which limiting is applied When the input signal level is below the threshold value no limiting takes place and the change in level of the output signal exactly matches the change in level of the input signal When the input signal level is above the threshold value limiting is applied such that the output signal level does not increase regardless of any increase in the input signal level Threshold is adjustable in the range 60 dBFS to 0 dBFS Attack Time A limiter monitors the level of the input signal and controls the level of the output signal accordingly When the
149. ssing a combine sets all attenuations to 0 dB and all polarities to in phase Input Attenuators The input attenuators can be adjusted three ways Using the Knob Click on the indicator on the knob and while continuing to hold down the mouse button move the mouse in an arc The numbers in the box below the knob will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control 10 July 1998 ee Fine F or Coarse C Control This button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the button will toggle the setting Polarity Control This button determines the polarity of the signal A indicates that the signal wil
150. ssing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Processing Components Compressor EW d D h AC Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Fine F or Coarse C Control This button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the button will toggle the setting Knee Control This button determines the type of transition that occurs when the component goes from inactive to active A Hard knee causes the response by the component to be abrupt while a Soft knee causes a gentle response Clicking on the button will toggle the setting Ratio Control To change settings click on the arrow next to the number in the text box A selection list will appear The list may or may not be scrollable To make a selection click on the desired entry Sidechain To make a selection click on the desired entry Bypass Control master This button determines if the component is in the processing chain If the LED on the button is gray then th
151. ssor 3 Adjust the Crest Factor Sensitivity control so that the compressor responds appropriately to short signal peaks If it were possible to know in advance what the crest factor of the Processing Components Compressor 8 8 input signal was going to be then the Crest Factor Sensitivity control would ideally be set to 1 Crest Factor of Input Signal Since this quantity is not generally known it is best to experiment until satisfactory results are obtained Metering The compressor meter shows the attenuation applied to the signal passing through the compressor at any given moment in time When the signal is being compressed the meter indicates negative values gain less than 1 0 When the signal is not being compressed the meter indicates 0 dB gain of 1 0 Meter values are raw no averaging or ballistics are applied Notes on Operation of the Compressor Bypass Bypassing a compressor causes the signal to pass through unaltered Overshoot The compressor algorithm used in the ISP 100 allows for a small amount of overshoot on transients regardless of the settings of the Detection Window and Crest Factor Sensitivity controls The amount of overshoot is somewhat dependent upon the setting of the Threshold control the lower the threshold the greater the overshoot This represents normal operation for the compressor Computation of Average Level There are two common methods of computing average signal level one is
152. t and output cables for proper wiring and the unit before continuity checking the fuse Check the signal source s Check the connection between the computer and the ISP 100 if a computer is being used Check the GPI connections if the GPI is being used Troubleshooting EN wP hM Diagnostics LED IDENTIFIER Host LED Off Host LED Green CAUSE OR MEANING Loss of internal or external power Memory is OK Host LED Yellow Host LED Red COMM LED Off COMM LED Green Memory was reset An input only card is in an output only slot or vice versa No communications activity Communications activity COMM LED Yellow COMM LED Red None Communications error Slot LED 1 5 Off Slot does not have a card inserted Slot LED 1 5 Green Card inserted in slot Slot LED 1 5 Yellow None Slot LED 1 5 Red Host LED Blinks Green Host LED Red amp Slot 1 5 LED Blinks Red Slot 1 5 LED Blinks Yellow Slot 1 5 Blinks Green Clipping occurred on one or both inputs and or outputs on card in slot Memory backup battery voltage low replace battery An input only card is in an output only slot OR an output only card is in an input only slot The selected QuickMAP expects a card different from the one currently in the slot OR the slot is empty and the selected QuickMAP requires a card in the slot A card was identified but is not needed by the selected QuickMAP
153. t settings from the component being dragged to the component it is dropped on QuickMAP Component Bypassing Right clicking on the component boxes will produce a pop up menu The user is able to modify component settings this is the same as left clicking on the component access its properties import or export settings and in selected cases bypass the component A fully bypassed component will appear red in the QuickMAP Please note that this only occurs when the main bypass is activated for that component Using VUE IT 7 1 I hA Properties see Figure 7 21 1 0 Properties Slot 1 Input Slot 1 MIM 1 Slot 2 MDM 1 Slot 3 MOM 1 Slot 4 MOM 1 Slot 5 MOM 1 Slot 3 Output Figure 7 21 O properties dialog Input The Input Function controls the levels entering the unit This function can be accessed in any of the following three ways 1 Clicking on the green input triangles 2 Right clicking on either the green input or green output triangles and selecting Properties from the pop up list 3 Clicking on the I O Slots entry in the Project Manager and then clicking on the Properties button Using the Stereo Control This button controls the tracking of the Gain Attenuator levels If the LED is gray then the two channels do not track each other If the LED is blue then the channels track each other Clicking on the button will toggle the setting Gain To change s
154. t which is used and the letter indicates the connector used For example IN 1A would indicate that it is an input using connector A of slot 1 Applying QuickMAPs When looking for a QuickMAP that fits your application it is important that you keep in mind that not all portions of a QuickMAP must be used It is possible to load a QuickMAP that requires more cards than you have or need The slots that do not contain cards may give an error indication yellow flashing LED As long as the slots corresponsiding with the portion s of the QuickMAP you are using are filled there will not be a problem Standard QuickMAPs MONDOEQ QMS 0061 GL S Nva 2 OL al 99 as as as 3lvo db 1997195 0061 OL 50 2 50 2 OL YL VS VG A HG dlvo 10313S VI NIYO 10 July 1998 2X6CMBC QMS ge 1no ve LNO av LNO NIVO LNO
155. taining mostly low frequency energy require longer detection windows Processing Components Gate 8 44 Detection Window is adjustable in the range 20 uSec one sample to 5 Sec Metering The gate meter shows the attenuation applied to the signal passing through the gate at any given moment in time When the signal is below threshold and the gate is closed the meter indicates negative values gain less than 1 0 When the signal is above threshold and the gate is open the meter indicates 0 dB gain of 1 0 Meter values are raw no averaging or ballistics are applied Notes on Operation of the Gate Bypass Bypassing a gate causes the signal to pass through unaltered Computation of Average Level There are two common methods of computing average signal level one is based upon RMS Root Mean Square calculations and the other is based upon Absolute Value calculations Each of these methods produces a slightly different value for signal level and the difference depends upon the characteristics of the signal itself The ISP 100 gate uses Absolute Value for its computation of signal level so the level reported by the gate may differ slightly from the RMS value expected for a given signal Keying from Other Channels When the key channel input to a ISP 100 gate is selected to be a channel other than its input the gate controls must still be set The key channel selects only the channel s data not its gate control settings If m
156. ter and highpass filter in the high band the 6 allpass filter in the mid high band the 0 allpass filter in the low mid band and the LP lowpass filter and allpass filter in the low band The inclusion of these filters is mandatory for proper implementation of the 4 way Linkwitz Riley crossover they ensure that the phase shift and magnitude response in each band match those of the other bands to maintain the fundamental Linkwitz Riley sum to allpass quality A detailed explanation of the use of compensation filters such as these may be found in Active Realization of Multiway All Pass Crossover Systems by Joseph A D Appolito Journal of the Audio Engineering Society Volume 35 Number 4 April 1987 A 4 way Linkwitz Riley crossover is essentially a combination of three 2 way Linkwitz Riley crossovers This means that the polarity requirements associated with a 2 way Linkwitz Riley crossover carry over to a 4 way crossover Processing Components Crossover 9 0 J A properly implemented 2 way 12 dB octave Linkwitz Riley crossover is characterized by 2 order Linkwitz Riley Butterworth Squared lowpass filter 6 dB magnitude response at crossover frequency 2 orger Linkwitz Riley Butterworth Squared highpass filter 6 dB magnitude response at crossover frequency polarity of highpass band opposite that of lowpass band In a 4 way crossover the bands associate in non obvious ways see Sum to Allpass
157. th turned off 2 Connect the computer to the ISP 100 3 Hold in the default switch located to the left of the power switch and turn on the ISP 100 Continue to hold in the default switch until the LEDs turn red and begin rotating See Figure 2 1 item 6 4 Turn on the computer and start the VUE IT software You should see a dialog box similar to that in Figure 5 2 10 July 1998 Open OS File File name Folders c Nprogra 1 vue it isp 100 Cancel m205v211 osi 1 Network vue it 4 isp 100 backup __ complib List files of type Drives Merlin OS Files osi c system T Figure 5 3 Open OS file dialog 5 Download the OS software file you need viathe application when prompted See Figure 5 3 for more information The default location for OS files is c program files vue it isp 100 M205 211 0SI 05 Ver 2 05 DSP Ver 2 1 Downloading new OS Message 742 Figure 5 4 Download progress dialog 6 The lights will continue to rotate with only brief pauses You will also see a progress indicator on the PC s screen similar to the one in Figure 54 7 When the download is complete the ISP 100 will automatically restart 1 5 100 was detected and communications have been established VUE IT has been placed in online mode Figure 5 5 15 100 detected dialog 8 Wait for the HOST LED to light yellow and the rest of the LEDs
158. the meter information is post fader 10 June 1998 i e after the master attenuator A green LED indicates that the meter information is pre fader Clicking on the button will toggle the setting Processing Components Gain Increment Key Channel FilterBank 1B Max of Both Figure 8 18 Gate component A gate see Figure 8 18 is used in situations where the input signal is characterized by long periods of silence and a noticeably high noise floor such as a signal taken from magnetic tape or from an open microphone Gating is accomplished by attenuating the output signal during the periods of input silence in order to reduce the audibility of the noise Familiar Controls Most of the controls in the ISP 100 Gate are common to nearly all traditional noise gates These controls should be familiar to anyone with experience in the operation of any gate Threshold The Threshold control adjusts the input signal level below which attenuation is applied When the average input signal level is above the threshold value no attenuation is applied and the level of the output signal exactly matches the level of the input signal When the average input signal is below the threshold value attenuation is applied and the level of the output signal is less than the level of the input signal by the amount dictated by the selected gated attenuation value Threshold is adjustable in the range 60 dBFS to 0 dBFS Opening Time
159. to light green At this point a window similar to the one in Figure 5 5 will appear The ISP 100 is now ready for use Installing VUE IT EN 2 Configuring the Software Turn on the ISP 100 The power switch is located atthe far right under the front access panel This is accomplished by placing the switch in the down position See Figure 2 1 forthe location of the power switch Check to make sure that the LEDs light in a percentage complete fashion Launch the VUE IT application on the PC System Configurations x Directories New Projects CAPROGRA TNVUE TMSP 1 D proje Modify Component Library CXPROGRA INVUE JTNSP 100Ncomp Modify QuickMAP Library C PROGRA 1 WUE ITMISP 100 qmar Personal Company Name TelexCommincations Designer s Name Public System Communications Serial Com 1 Default Preference Factory Defaults Figure 5 6 System configuration dialog A dialog box similar to the one in the Figure 5 6 should appear The System Configuration dialog box see Figure 5 6 allows the user to select the serial port used modify directories used and enter information such as the company s and designer s names It is recommended that you do not change the directory names unless you are an experienced user and know the implications of doing so See the entry titled VUE IT File System in section 6 for more information After the proper information has
160. ulate GPI contact closures without having to hookup external contact closures to the GPI inputs of the ISP 100 10 July 1998 QuickMAP A QuickMAP is a signal processing m iis p Gain Select Filters Delay 2Overy Filters Delay Limiter Dither p topology used with 15 100 The Fiters Delay Limiter Dither QuickMAP sets the Gai Select Filt Del Limit Dith elect Filters Limiter tner 2 signal paths and d processing from Filters Delay Limiter Dither 929 input to output An 50 18 P 1 00 can hol d one p Gain Select Filters Delay Filters Delay Limiter Dither QuickMAP time Fiters Delay Limiter Dither Hyi Figure 7 20 QuickMAP panel Double clicking on the QuickMAP name entry or by clicking on the entry and then clicking on the Design button can access a graphical representation of the selected QuickMAP see Figure 7 20 Clicking on the green input triangles in the QuickMAP will open the I O Properties dialog see Figure 7 21 Clicking on the green output triangles will open the Output Meters see Figure 7 24 Clicking on the component boxes will open the component Placing the pointer on a component holding down the left mouse button and dragging the component onto a component of the same type and releasing the mouse button will copy the componen
161. ultiple gates utilize the same channel as their key sources then all controls on all gates must still be configured Metering The meter located to the left of the component indicates the amount of attenuation in dB Attenuation and Threshold Controls These controls can be adjusted three ways Using the Slider Click on the indicator on the slider and while continuing to hold down the mouse button move the mouse up and down The numbers in the box below the slider will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted 10 July 1998 Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Open Window Close Controls These controls can be adjusted three ways Using the Knob Click on the indicator on the knob and while continuing to hold down the mouse button move the mous
162. ust a selection between a relatively long detection window of generally a few tens or hundreds of milliseconds and a very short detection window of generally a few tens or hundreds of microseconds The ISP 100 compressor provides for operator control of the length of the detection window Very dynamic signals and signals containing a lot of high frequency energy require shorter detection windows Non dynamic signals and signals containing mostly low frequency energy require longer detection windows Detection Window is adjustable in the range 20 uSec one sample to 5 Sec 10 July 1998 ee Crest Factor Sensitivity A signal s crest factor is the ratio of a its peak level to its average level The signal having the lowest possible crest factor is the square wave whose peak and average levels are equal and whose crest factor is therefore 1 0 The peak level of a pure sinewave tone is 1 414 times its average level a sinewave therefore has a crest factor of 1 414 Most music and speech signals contain peaks that are very much higher than their average levels therefore their crest factors are very much greater than one The important points to remember are that a signal s peak value is always greater than or equal to its average value and that the crest factor of any signal is therefore always greater than or equal to 1 0 The Crest Factor Sensitivity adjustment on the ISP 100 compressor function controls its sensitivity to the crest fa
163. uts x 6 Outputs 2 Inputs x 8 Outputs 4 Inputs Outputs 2 Inputs x Outputs 4 Inputs x 4 Outputs QuickMAP Description 12 05 1997 13 35 31 12 30 1997 09 58 21 12 05 1997 13 33 12 12 05 1997 13 22 51 12 05 1997 13 32 21 12 05 1997 13 31 23 12 05 1997 13 28 28 Mono Three Way Crossover with full range spur and two independent 12 22 1997 03 53 00 12 30 1397 10 15 43 12 22 1997 03 52 33 12 18 1997 11 40 19 12 22 1997 09 52 20 12 22 1997 03 51 58 12 22 1997 09 50 53 full range channels OK Cancel Figure 6 3 QuickMAP selection dialog If the Build from Script option is selected a dialog similar to the one Figure 6 3 will appear Here you will be able to select the script that will be 10 July 1998 CAUTION Trying to connect to an ISP 100 with a VUE IT version different from the one used to create the project stored in it is not allowed Do not update the OS Updating the OS will erase the project stored the ISP 100 Use the version of VUE IT that created the project to Upload the project from the ISP 100 to the PC and save it Then update the OS and restore the project used to create the QuickMAP The QuickMAPs can be sorted by Name Configuration Creation Time and Modification Time To sort the QuickMAPs click on the heading button of the property you wish to sort by i e Name I O Configuration etc The first click of the mouse will sort the QuickMAPs in ascending
164. ws To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of 10 July 1998 increase or decrease is controlled by the fine coarse control Attack Window Release and Crest factor controls All of these controls can be adjusted in three ways Using the Knob Click on the indicator on the knob and while continuing to hold down the mouse button move the mouse in an arc The numbers in the box below the knob will change When the desired level is reached release the mouse button Using the Text Box Click in the box Using the Back Space and or Delete keys erases the current entry and enters the new level Be sure to press the Enter key after the entry is made Clicking outside the text box without pressing the Enter key will cause the setting to return to the number that it was before a change was attempted Alternatively click and drag across the number in the box to highlight the number in it Type the new setting and press the Enter key when finished Using the UP DOWN Arrows To increase the level click on the up arrow To decrease the level attenuation click on the down arrow The amount of increase or decrease is controlled by the fine coarse control Fine or Coarse Control This button determines the increment decrement associated with the UP DOWN arrows Fine produces small steps in value while Coarse provides large steps in value Clicking on the butt
165. y given moment This makes stereo linking possible by configuring the limiters identically and utilizing the same sidechain source for both Processing Components Limiter 8 48 Unfamiliar Controls There are two controls on the ISP 100 limiter that are not available in traditional dynamic range limiters These controls provide much greater flexibility and utility to this limiter than can be achieved with traditional limiters 10 July 1998 Detection Window The detection window is the period of time over which the limiter computes the average signal level Every dynamic range limiter that operates upon average signal level uses a detection window In traditional limiters this window is of fixed length and the operator may not even be aware of that length Some traditional limiters provide switching between average and peak detection This is actually just a selection between a relatively long detection window of generally a few tens or hundreds of milliseconds and a very short detection window of generally a few tens or hundreds of microseconds The ISP 100 limiter provides for operator control of the length of the detection window Very dynamic signals and signals containing a lot of high frequency energy require shorter detection windows Non dynamic signals and signals containing mostly low frequency energy require longer detection windows Detection Window is adjustable in the range 20 uSec one sample to 5 Sec Crest F

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