Super-VU Meter
Contents
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3. Using Alignment Tones os ois ii i i Bia EE EEEE EE e eE TION 4 MAINTENANCE General nformation S C 1 2 3 4 5 6 C 1 2 3 Handling of CMOS Integrated Circuits 4 Access to Circuit Cards 20 POWER SUPPIY PET 6 Digital Dual Input Control Card 7 Analog Input cb Display Assembly AVN wawan dade do ab an EN s ME aaa RR 9 ADC Input Card LG 264 C 1 2 3 4 5 6 TION 5 REPLACEMENT PARTS LIST Power SUDDIV c cutee xar a edak once gU he Ras AR e e 5 Digital Dual Input Control Card Analog Input Control Card Display Assembly EEE ADC Input Card ck eR RE eme te peche eee ax ex RUE waa Front Panel Switches SBSSBSBSSBSSBAS S Oi Oi TI SECTION 6 MANUFACTURERS LIST SECTION 7 DIAGRAMS General Description i vd coed GE SE gp eR eee WEE de Ee A Electrical Specifications eee Where to Find a da BR a pee a ieee RP UR TT Hare ee EE STT Repacking for Shipment ficum Connecting Mains Power Input Selection on Dual Input Models
4. Connecting Digital Input Models Connecting Analog Input Models Rear Panel Programming Switches 10 Adjusting the Meter Scale Bargraph Description VU TE TE SECTION 7 GENERAL INFORMATION 1 1 General Description The Logitek Super VUis a bargraph type audio me ter featuring two tricolor LED bargraphs separated by an adjustable scale A switch on the front panel con trols the peak hold function The meters accept either analog audio or serial digital inputs and are available in three mounting configurations all with internal power supplies 1 2 Electrical ification Bargraphs per meter Two Indicators per bargraph 40 Normal Range 40 dB user selected zero reference Reference Point Response Time even dBs 0 to 30 dBFS VU Mode 300 ms 20dB attack amp release PPM Mode 0 us attack 2 8S 24dB release Peak Hold 0 us attack 2or5Second hold Max Hold 0 us attack pushbutton release Image Phase 3 Sec hold on max image Frequency Response Normal Modes 4 1 dB 20 Hz 20 KHz Brightness control 2 levels Analog Input Sensitivity 10 to 20 dBu for full scale rear panel adiustable Overload Level 24 dBu mpedance 40 Kohm balanced CMRR 65 dB 2 60 Hz Connector 3 pi
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8. SECTION 4 MAINTENANCE 4 1 General Information The Super VU is designed to need a minimum of maintenance for long trouble free operation Should repair be necessary the technician should first read the information in the manual concerning the circuits in guestion and should follow proper procedures for testing and replacing semiconductors Logitek engi neers are readily available at the factory to provide technical assistance both during and after the war ranty period 4 2 Fuse The primary winding of the power transformer is fused with a 1 2 amp slow blow 20mm fuse housed in a fuse holder in a slide out drawer under the power cord on the rear panel of the unit lt should only be re placed vvith fuses of the same type and current rating The povver cord must be unplugged from the rear panel to gain access to the fuse holder WARNING x Do NOT replace the fuse without first disconnecting the meter s power cord from the wall socket as dan gerous voltages are present which may cause electri cal shock Always use fuses of the same value and type as specified in this manual Do NOT use fuses of a higher value than those specified as shock hazard and fire hazard may result kk ck ck ck ck Ck ck Ck Ck ck Ck Ck Ck Ck ck Ck Ck Ck ck ck Ck ck ck ck ko kok A blown fuse is most often although not always a symptom of another failure Related circuitry should always be carefully examined after any fuse failure
9. SUPER VU LED BARGRAPH AUDIO METER Operation amp Service Manual Logitek Software License Agreement The Super VU unit you have purchased contains embedded software The software is owned by Logitek Electronic Systems Inc and is protected by United States copyright laws and international treaty provisions Logitek grants to you the right to use one copy of the embedded soft ware in each Super VU meter you purchase You may not rent or lease the software You may not reverse engineer decompile disassemble or cre ate derivative works from the software You may not create copies of the software This statement will be governed by the laws of the State of Texas U S A Logitek reserves all rights not specifically granted in this statement All information contained herein is confidential No portions of this man ual may be reproduced by any means without written permission from Logitek Electronic Systems Inc COPYRIGHT 1994 LOGITEK ELECTRONIC SYSTEMS INC Super VU LED Meter INSTRUCTION MANUAL Table of Contents CTION 1 GENERAL INFORMATION m sch SECTION 2 PREPARATION FOR USE 1 2 3 Instrument Identification SEENEN NIESEN bk ene a edni 4 SECTION 3 OPERATING INSTRUCTIONS PEMDSD AY eebe er dee e Ba EE Peak Hold Display x42 vases twas oes teacher et Ee E SE a E eren na 5 Image Sum Display
10. NC NMC1206NPO222K50TR AV TAP105K035HSB AV TAP475K025CCS NC NMC1206Z5U104M50T AV 12061A471JATMA NC NMC1206Z5U104M50T AV 12065E103MATMA AV TAP105K035HSB AV 12065E103MATMA NC NMC1206Z5U104M50T AV 12061A471JATMA NC NMC1206Z5U104M50T GI 1N4734A SG NE5532N AD SSM2143P MO MC79L05ACP MO MC78L05ACP AD AD1877JR EM 100 083 10 1003 SW RN 114BCP PN 050 010 455 MU BLM32A07PB DL RNC55H2102BS MP CT9X503 DL RNC55H2102BS LG 264A MR ST1 4L5S5ZBJ3J90 22 Super VU Instruction Manual SECTION 6 MANUFACTURERS LIST CODE MANUFACTURER LOCATION AD Analog Devices Norwood MA AV AVX Stantel Corp Myrtle Beach SC BE Belden Richmond IN CA Catalyst Semiconductor Santa Clara CA CE Centralab Electronics Div Milwaukee WI CK C amp K Components Newton MA CS Crystal Semiconductor Austin TK CT CTS Elkhart IN EC E Switch Minneapolis MN EM Ecam Technology Scottsdale AZ Gl General Instruments Quality Technologies Sunnyvale CA HP Hewlett Packard Opto electronics Div Santa Clara CA IL Illinois Capacitor Lincolnwood IL LF Littlefuse Des Plaines IL LG Logitek Circuit Cards Houston TX LO Lite On Inc Semiconductor Div Milpitas CA MM Maxim Sunnyvale CA MO Motorola Semiconductor Products Phoenix AZ MP Mepcopal San Diego CA MR MORS Components Inc Wakefield MA NC NIC Components Corp North Amityville NY NI Nichicon Schaumburg IL NT Neutrik Lakewood NJ PR Mill Max Mfg Preci dip Oyster Bay NY PN Panduit C
11. OF THE POSSIBILITY OF SUCH DAM AGES IN NO CASE SHALL LOGITEK S LIABILITY FOR MONEY DAMAGES EXCEED THE AMOUNT PAID BY YOU FOR THE LOGITEK EQUIPMENT OUT OF WHICH SUCH CLAIM AROSE THE FOREGOING LIMITATIONS SHALL NOT APPLY TO CLAIMS RELATING TO DEATH OR PERSONAL IN JURY WHICH ARISE OUT OF PRODUCTS DEEMED TO BE CONSUMER GOODS UNDER APPLICABLE LAW Some states or provinces do not allow the exclu Sion or limitation of implied warranties or limitation of liability for incidental or consequential damages so the above exclusion or limitation may not apply to you The warranty and remedies set forth herein are ex clusive and in lieu of all others oral or written express or implied No Logitek dealer distributor agent or employee is authorized to make any modification or addition to this warranty Super VU Instruction Manual
12. especially if a replacement fuse also blows 4 3 Handling of CMOS Integrated Circuits All logic components in the Super VU meter are CMOS type integrated circuits Even though all cir cuits have built in static discharge protection special care must be taken in the handling of these devices particularly in dry environments MPORTANT Do NOT remove or handle CMOS integrated cir cuits except in a grounded environment which is free of the risk of static electricity Store such circuits on conductive foam or in anti static controllers Do NOT store on styrofoam or other plastic sheets Improper handling may damage these devices kk ck ck ck ck ck ck Ck ck ck Ck ck k ck ck k ck Ck ck ck ck kk k X X kok 4 4 Access to Circuit Cards Access to the circuitry of the rackmount and half rack meters is accomplished by removing the six screvvs that attach the top cover The inside of the desktop unit is accessed by removing the four screvvs along the edges of the bottom panel and pulling apart the tvvo halves of the plastic case Page 8 4 5 Power Supply Each Super VU contains a ground isolated and fil tered step down power supply to create the necessary operating voltages This supply is located ona PCBon the right side of the meter enclosure Mains AC from the power entry module J2 is fed through fuse F1 located in a dravver under the povver cord in J2 to J1 on supply card LG 253 J1 feeds volt age selec
13. for use by the ADC card If the digital receiver IC1 can lock onto an input sig nal then the DSP will display that signal whether it con tains errors or not If no signal is connected to J1 or the data rate is out of the receiver s capture range then the DSP will display the data from P5 This happens even if nothing is connected to the analog inputs or the ADC card is absent 4 7 Analog n ntrol r Power from input connector J1 is connected to volt age regulators IC3 and IC4 as well as display board connector J4 IC3 is a 5VDC regulator that feeds power to the analog front end of data receiver IC2 The voltages filtered by C1 C7 and clamped against over voltage and voltage reversal by D1 IC4 is a 5VDC regulator that feeds the digital portion of IC2 and all Be Super VU Instruction Manua other circuits on the control board The output voltage is filtered by C2 and clamped by D2 Distributed power filtering is supplied by C3 4 5 6 12 On power up the DSP is kept in reset by IC5 until the power has stabilized ensuring a good power on reset IC5 also contains a watchdog timer that will re set the DSP if its ST pin is not taken low at least once every 150 mSec This pin is normally pulsed low every 5 mSec by the left bargraph load signal The DSP IC7 is clocked by a 10 MHz crystal oscil lator consisting of Y1 C10 C11 and an internal driver IC7 Pin 43 is a buffered output of the oscillator The first thing
14. the DSP IC7 does after reset is copy its program from EEPROM IC6 to internal RAM memory The program executes continuously Note that the 8 bit data bus is connected to the middle byte of the DSP s 24 bit data port Address decoder IC8 is used to reset the watchdog timer IC5 connect the rear panel programming switches S1 S8 to the data bus via buffer IC1 and read write the data receiver IC2 control status regis ters Front panel rocker switches S9 and S10 are con nected directly to the low byte of the DSP data port Serial data is sent synchronously data clock load to the display driver chips via left right display connector J5 and image sum display connector J4 in 32 bit strings Data is placed on the top bit of the DSP data port and clocked into the display drivers via a write to address decoder IC9 Other writes to IC9 will load the 32 bit data string into one of the display driv ers J5 or J4 A write to the left bargraph low group will also be decoded by IC8 and used to rest the watchdog timer Signal from left input jack J7 is connected to bal anced receiver IC1 via R5 and R7 The resistors form a voltage divider with the input resistance of the IC to create a 6 dB loss The IC also has aninternalloss of 6 dBs The 12 dB total loss allows 424 dB signals to be handled by the 5 volt op amps R5 R7 and C2 C3 form a low pass out of band filter The single ended output of IC1 is fed via R1 to op amp IC2b R2 adjusts t
15. unit Consult the factory for details 2 7 Connecting Digital Input Models The Super VU accepts AES EBU or S PDIF serial data at sample rates of 30 000 to 50 000 samples per second via a female XLR connector on the rear panel The input is also wired directly to the male XLR con nector on the back panel for use in loop through mode The loop through connector provides a convenient way to daisy chain several pieces of equipment off of one digital output Pass through works well with AES EBU signals but should be limited to 10 feet with S PDIF signals and cables S PDIF signals using RCA type plugs may be con nected to the input using an RCA to XLR adapter Coax cables using BNC connectors can be connected to the input using a BNC to XLR adapter Both adapt ers are available from Logitek AES EBU Connection Pin 1 Ground Pin 2 Signal Pin 3 Signal Itis also importantto setthe two input load switches located between the two XLR connectors Input Load Switch Settings Sw1 Svv2 Ohms Use Up Up 12200 Pass through mode Up Dn 110 balanced twisted pair XLR Dn Up 75 unbalanced coax RCA 8 BNC Dn Dn 144 do NOT use this combination Page 5 2 8 Connecting Analog Input Models The Super VU accepts balanced or unbalanced in puts via the XLR connectors on the rear panel The connectors are wired as follows Balanced Connection Pin 1 Ground Pin 2 Signal 4
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17. 2 dB Dn Up Dn Up 10 dB Dn Up Dn Dn 8 dB Dn Dn Up Up 6 dB Dn Dn Up Dn 4 dB Dn Dn Dn Up 2d3B Dn Dn Dn Dn 0 dB Page 6 Switch 2 turns the peak program mode PPM dis play on and off Peak hold is controlled from the front panel and is unaffected by switch 2 Switch 3 sets the amount of time the peak hold dot retains the largest peak reading before resetting Bargraph Settings Sw1 Sw2 Sw3 Function Up 5 Second peak hold Dn 2 Second peak hold Up PPM display ON Dn PPM display OFF Up Peak hold display ON Dn Peak hold display OFF Switch 4 is used to control the brightness of the bar graphs Brighin in Sw4 Function Up Low display illumination Dn High display illumination The mode switches are only checked occasionally so it may take up to two seconds for switch changes to be reflected in the meter s operation 2 10 Adiusting the Meter Scale The meter scale is printed on a piece of plastic film that is attached to a support bracket between the LED bargraphs The scale covers a range of 20 dB to 40 dB with only a portion showing through the display opening The scale 0 dB point can be physically moved to the left or right by removing the meter cover plate and detaching the bargraph assembly to gain ac cess to the unseen portion of the scale strip In this way the printed 0 dB point can be mad
18. 70 61 R104 DL RNC55H2102BS DL RNC55H2102BS DL SOMC1603203G CT 194 8MST CT MP122 LG 266 Analog Control CE UK50 104 AV TAP106K025HSB CE UK50 104 SY VBRG5641X order by brightness number on display card 40 pin sip socket Integrated Circuits 64 LED driver 24 pin dip socket PR 310 93 140 41 001 MM MAX7219CNG EM 100 243 10 1003 Page 13 SYMBOL DESCRIPTION LOGITEK PART NUMBER P1 J1 IC1 2 IC2 3 IC5 IC6 IC7 4 pcs J1 2 J3 FR1 3 R1 2 R3 7 R8 9 R10 11 R12 R13 14 1 pc 5 6 Front Panel Switches 1 to 4 pcs Page 14 Connectors 10 pin dual row header 10 pin dual row socket Resistors 5100 Super VU display circuit card Capacitors 75pf 1000V ceramic 4 7uf 25V tantalum 2200pf 50V ceramic SMD 1uf 35V tantalum 4 7uf 25V tantalum 1 uf 50V ceramic SMD 470pf 100V ceramic SMD 1 uf 50V ceramic SMD 01uf 1uf 35V tantalum 01uf 1 uf 50V ceramic SMD 470pf 100V ceramic SMD 1 uf 50V Z5U SMD 1206 Diodes 5 4V zener Integrated Circuits Quiet op amp Balanced line receiver 5VDC regulator 100 mA 5VDC regulator 100 mA ADC 16 bit stereo 8 pin dip socket Connectors Phone jack switch PC 10 pin dual row socket Ferrites Ferrite bead Resistors 21k 196 4220 196 50K multiturn trimpot 24K 196 4220 196 300 ADC Input circuit card Switches 3 position rocker switch PN 051 010 153 PN 050 010 455 LG 260A CE DD 750 AV TAP475K025CCS
19. A O M 031151p Boi pu m Ala U99A 90 buiyojims cere 91 bw0 no q0u S0142 2 01 OUS El E ES LI luasaid si 1ndul ae A y p1151p PIIOA ER ueum indui bojoup l JGA G O y Kojdsip o 19u1950j suld is om s y 110US g JE 8d Ly al 33 1050009 10 9 TU 52 u m K ig 2 Cl OLS 6S d 85 15 HO11AS d q HOLIMS 410 Super VU Instruction Manual HOf10dH 4001 1141 1VLI9IQ NV 9c DO OOF is o 6 SES TET A e
20. BOL DESCRIPTION LOGITEK PART NUMBER FR1 7 IC1 2 IC3 4 IC5 IC6 IC7 IC8 IC9 IC10 IC11 IC12 5 pcs 1 pc 1 pc J1 2 J3 J4 J6 7 P3 P4 P5 6 R1 2 R3 5 R6 7 R8 9 R10 11 R12 14 R15 16 R17 18 R19 20 R21 22 S 1 8 C1 C3 4 D1 80 6 DCS IC1 3 3 DCS Be Super VU Instruction Manua Ferrites 600 ohm 100Mhz Integrated Circuits Dual bi fet op amp Balanced receiver 6dB 5 VDC regulator 100mA 5VDC regulator 100 mA 16 bit ADC Watchdog timer uP reset 3 to 8 decoder 32K x 8 EEPROM 16 bit DSP 5VDC regulator 1 5A 8 pin dip socket 32 pin PLCC socket 68 pin PLCC socket Connectors Female XLR 3 pin socket 3 pin large socket 10 pin dual row socket 3 pin header 3 pin large header 10 pin dual row header Resistors 50K trimpot multiturn 4220 196 100K 100K 296 5 position bussed 21K 196 4220 196 300 24K 196 20K 8 position isolated SMD 10K Switches Dip switch block Crystals 12 288 Mhz Circuit Card Capacitors 1 uf 50V ceramic 10uf 25V tantalum 1 uf 50V ceramic Diodes Tricolor LED bar 2mm x 5mm MU BLM31A601SPB TI TLO72CP AD SSM2143P MO MC79L05ACP MO MC78L05ACP AD AD1877JR MM MAX1232CPA MO SN74HC138AD MC 28C256A 25 L AD ADSP 2105KP55 MO MC7805CT EM 100 083 10 1003 EM 150 032 11 02 EM 150 068 11 02 NT NC3FK H PN CE100F28 3A PN CE156F20 3A PN 050 010 455 PN MFSS100 3A PN MFSS156 3A PN 051 010 153 MP CT9X503 CT 7
21. G6 90 87 MDJ5DpI jusuodwo OMINOO 90 VNV NAN NAS 100 14 41 NAS 89 069 9 5 N O x l d LA ld GZO 979 INO 39VNI TAS 1nO_Ay dSId NAN 9d 224 5 LIS Na cl A C3 29 U CO 2 m 90A Di l og 0 3 EH 4 20 6 6 HP E e CS et kisi E E Ol 20 t CH E a 46 020 9 1122 g iE S 3 219 Y 5 5 00 1 2 a cO ev 12 72 ao ZIO 914 921 ole vid Isl OOOO OOOO o OS y la Gol Xi mol 9 G M D 0 0 O l za SE bla OJ O di Ze Ld O_O RO co ZM E x 61412 64 EH olu 8H d N gg 8S 1S HOLIMS 410 1141 1H918 Page 21 Super VU Instructio
22. O Q O T O o o 4 H S O Zi izi l o o SM a Id P etn SE CO lo role d zd 2 20 64 gd 2 O D INdNI INdNI 43 Page 23 Super VU Instruction Manual
23. Pin 3 Signal Unbalanced Connection Pin 1 Shield Pin 2 Center Hot Pin 3 Connect to pin 1 When using balanced connections care should be taken to be sure that cable shields are connected to grounded eguipmenton only one end ofthe cable On any cable which connects two pieces of eguipment of which both are grounded the cable shield must be left unconnected on one end or poor noise performance may result The zero reference level for each input can be set anywhere between 10 dBu and 20 dBu by adjusting the multiturn gain control located adjacent to each in put connector A small flat blade screwdriver is needed to adjust the gain 2 9 Rear Panel Programming Switch A block of eight mode setting switches is located on the rear panel of the meter to the right of the input XLR connectors The switches are numbered 1 through 8 and are set by pushing the white levers up or down with a small screwdriver or pen point The bargraph zero reference marker is set via switches 5 6 7 and 8 as shown These switches only move the location of the orange reference marker and do not change the input signal gain Zero Reference Setting Sw5 Sw6 Sw7 Sw8 dBs below full scale Up Up Up 30dB Up Up Up Dn 28 dB Up Dn Up 26 dB Up Up Dn Dn 24 dB Up Dn Up Up 22 dB Up Dn Up Dn 20 dB Up Dn Dn Up 184 Up Dn Dn Dn 16 dB Dn Up Up Up 14 dB Dn Up Up Dn 1
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25. T ERPAG 2575 m y 21011 8 6 fox 8 coi bca s dy A 4221 31v9s 07 0112 9 E 4 x Langa dozv ava is 03 Als 3 sv voila L ER 015 de QNnoao eve 31 01 2 ZE 9v 901 02 ezo 220 ay ls s 15 diss S1SSVHO A vz x Lud KH X10 M3S i I E Sa 1 4 pena dozy Zei 311834 191 peen zil Z ev 201 Lg vo an vd TA 8 Lv ev o N 2Z 61 zo POOL y v te ov ZL AG 0 410 gem SEA Awas SDI P5901 cr 91 Die D N Ho o O 99 S Lie o n avia 1H913 ziy also 05 L 319934 SE unu E EE SE r ve nn ZU _ avas olo 2 5 1498A 3113434 OdB8 llNM viw 99 ST 8 u LOGNI 1H9lM z 9sz v8e 210 2r 97587 Ans OS 1 L Kords g 3 1 nA 2edns 01 L L L D i jsepaqa p sn YON NA 0411N 620 kad lt ua EZ sy 21 Ld 153 dv a 4 Our Bu yao 919 des QNnoago EL so 15 SISSVHO SO16Z i Lavo 6 3793 1 dozy doozz 992 924 z 00 Kc u 1 412 vo E az gps dur OL NL Di LS Fo 3113234 2198 TULA a Q 1 m ERE cina 4198 T3NNVHO V OOF SEN ez ino viva 1331 E sia g z L W Luv vivas VEER cu sriznss gt gt z FT ozo 51 DIER 358 xD oc O18 319833 D r 6 221 S g L LNY L sol ON lt La Lala IMAN 14331 avag Ed LT 3113333 LIA PELNI I c id Lol z FT vz s084 tes st 2121 L Page 20 990 9
26. carton carefully for external damage f the carton shovvs evidence of abuse ask the carrier s agent to be present when the unit is un packed Carefully unpack the unit to avoid damaging the equipment through the use of careless proce dures nspect all equipment for damages immediately after unpacking Bent and broken parts dents and scratches should be noted If damage is found refer to paragraph 2 2 for recommended claim procedures Keep all packing material for possible future use 2 2 Claims If the unit has been damaged notify the carrier im mediately File a claim with the carrier and advise Lo gitek of such action to arrange for repair or replacement without waiting for a claim to be settled with the carrier 2 3 Repacking for Shipment If the unit must be returned to Logitek attach a let ter to it showing the owner s name and address A de scription of necessary service should be included in the letter The original shipping carton and packaging materials should be used for reshipment if possible Use FRAGILE labels on each surface Return the unit freight prepaid Be sure to insure the unit for its full value The unit will be repaired promptly and returned freight prepaid 2 4 Installation Rackmount Enclosure The Super VU rackmount models are designed to be mounted in a standard 19 equipment rack by using the four mounting holes in the corners of the front panel Plastic washers should be used to keep the m
27. ch is covered by a separate warranty against de fects in materials and workmanship for two years pur suant to the following terms and conditions The warranty extends to the original purchaser only LOGITEK will repair or replace at its option at its factory without charge professional equipment if a de fect in materials or workmanship develops during the first two years following purchase when the equip mentis returned to the factory or LOGITEK authorized service centers freight prepaid with a description of the nature of the failure No reimbursements can be made for repair charges that are not factory autho rized After repair or replacement LOGITEK will re turn the equipment to the purchaser freight prepaid In the event that any part of this professional equip ment becomes defective during the first two years fol lowing purchase and purchaser wishes to attempt repair purchaser may obtain a replacement part by notifying LOGITEK of the part of the equipment which has failed LOGITEK will thereafter ship a replace ment part freight prepaid LOGITEK may require the purchaser to return the defective part to LOGITEK freight prepaid as a condition of such replacement ei ther before or after LOGITEK ships the replacement part LOGITEK shall not be responsible for any other charges or liabilities associated with pur chaser made repairs No part or equipment shall be considered defective if it fails to operate due to exposure
28. d clocked into the display drivers via a write to address decoder IC7 Other writes to IC7 will load the 32 bit data string into the left bargraph right bargraph or scale indicator driver groups via P6 A write to the left bargraph will also re set the vvatchdog timer Two channel audio data is fed synchronously data clock frame sync from digital data receiver IC1 to DSP IC6 serial port 1 Encoded audio data enters the meter via XLR con nector J1 and is directly connected to the output con nector P2 Note that no buffering is applied to the loop through output The input data signal is connected to pulse trans former T1 via DC blocking capacitor C5 The output of T1 is loaded by R1 R2 R3 and connected to data re ceiver IC1 C1 and R4 form a loop filter used by IC1 to recover the embedded clock from the coded input sig nal IC1 separates the audio data channel data and clock from the input data The audio is sent to the DSP in 64 bit strings via a serial port Three other signals from IC1 are read once per stereo sample and are connected to the DSP s parallel data port via isolation resistors R9 These are the channel status bit start of subcode data block flag and receiver error flag These are input to the DSP via a read to address zero Connector P5 attaches to the DSP s other serial port and allows analog data to be sent to the DSP via an external ADC card The connector also provides power and the master processor clock
29. e to match the orange zero reference marker Super VU Instruction Manual SECTION 3 OPERATING INSTRUCTIONS 3 1 Bargraph Description The Super VU display contains two multi LED bar graph displays mounted one above the other The top bar shows either left channelor image phase informa tion The bottom bar shows either right channel or mono sum information The 40 segments are tricolor LEDs that can be green red or orange depending on their function and cover the range from 39 dBFS to 0 dBFS decibels below full scale The zero reference point of the meter is indicated by adim orange marker in the bargraph The reference mark can be varied between 0 and 30 dBFS in 2 dB steps via switches on the back panel The scale can also be moved to line up with the marker light 3 2 VU Display VU is indicated by a solid green bar VU represents the perceived loudness of the input signal The motion of the bars conforms to the industry standard 300 mSec per 20 dB rise and fall times The VU display is always active 3 3 PPM Display True peak PPM information is shown by a single red segment PPM represents the highest point of the input signal The display has a zero rise time and an in dustry standard 2 8 Sec per 24 dB fall time The PPM display is alvvays active unless it is turned off by the programming svvitches on the back panel 3 4 Peak Hold Display The peak hold display is a single red segment that maintains the
30. he op amp gain and is used as the zero reference trim IC2b rives the input of 12 bit sampling ADC IC5 Reads to address decoder 1C13 are used to start the ADC and to read the results via the 12 bit data bus The ADC signals a finished conversion by grounding the DSPs interrupt pin The right input is handles identically to the left in put 4 8 Display Assembl 5VDC from P1 is filtered by C1 C2 C3 and C4 for use by the three driver ICs The display drivers accept synchronous serial data clock data load in 16 bit strings composed of an address byte and a data byte A separate signal loads each IC Page 9 Each display driver IC controls 64 LEDs by scan ning them in an eight by eight matrix Segment lines are current controlled and connect to the LED anodes Digit lines connect to the LED cathodes Scanning is accomplished by taking each digit line low one at a time and sourcing current from the segment lines for whichever of the 8 LEDs in a digit group need to be lit Maximum LED brightness is set by the external resis tors The drivers further control brightness by pulse vvidth modulating the LED on times vvith a value sup plied by the DSP Remember to consult the component diagram for the correct orientation before installing a new LED Ifa LED is installed backvvards the red and green colors vvill be reversed 4 9 ADC Input Card LG 264 The audio from the left input 1 4 phone connector J2 is connected to a RF lovvpas
31. highest PPM reading for a user selecta ble amount of time If the holding period expires before the PPM dot equals or exceeds the peak hold dot then the peak hold display will be turned off until the PPM dot reaches a new peak Two holding modes are available Release PEAK mode holds the peak reading for either 2 or 5 seconds depending on the position of the rear panel program switches Maximum Max mode holds the highest peak reading until it is manually reset by pressing RST Peak hold is controlled vvith the front panel rocker svvitch and is alvvays active unless it is turned off by the programming svvitches on the back panel 3 5 1 S Image Sum Display Super VU meters are available vvith a second dis play that shows additional information about stereo in put signals The lovver bargraph displays the mono sum of the left and right input channeled The display operates identically to the left and right bargraphs in the main Super VU Instruction Manual display Some models control the mono peak hold fea ture from the same switch as the left right display and some models have an independent control The upper bargraph shows the stereo image and relative phase information An orange marker in the center indicates 0 degrees The scale covers 180 de grees which is the largest relative phase difference two signal can have The red dot indicates the current location of the left channel in the stereo sound fie
32. ld and the green dot in dicates the current location of the right channel in the stereo sound field The overall width and location of the stereo image is shown by a second pair of red and green segments that hold the furthest left and right readings for about three seconds If a mono signal is being displayed then the red and green segments will be at the same location resulting in a dot that looks orange If the mono signal is off cen ter such as left channel only the resulting orange dot will be off to one side of the display If both input levels are less than 36 dB full scale than the image meter will deactivate Noise and nu meric resolution cause incorrect readings to be dis played at lower input levels 3 6 Using Alignment Tones The Super VU calculates the average signal aver age and displays it as the VU bar The single highest signal sample is also determined for the peak display Sincethere is no averaging involved in the peak meas urement that number will be much higher than the av erage level for any signal other than a square wave Standard ballistics however are defined in terms of sine wave inputs Therefore the Super VU calcu lates the average value of the sine wave that would produce the measured peak reading and displays that as the peak dot Doing this causes the peak and VU readings to be the same for sine wave input signals and the difference between the two readings to be the crest factor Page 7
33. n Manual Zi6 Pc 9 1 LAdNI IYAG 401 OQV Set 016 e 6 e Tw L SE c KS 00 8 p La 274 i Qv38 m SED C ox S2 L eo 3113334 oz 33 QNOv 1S 1S WI m 1S E SLENL 9229 pel EE 2 82 za L NI MIO Yo PLO M19 SO181 CLD OG PPAV 2 OG DU 6 L 921 yz S Old 9 zana HI SUA 311834 L LO L Lv EE Te SE or 9 sz E ZPPAG HONOV 2 5 2 G A qzol Langa INNOYY i TE Sco 8 SI SSVHO ozo 619 Pa eo v LSO EG d ZZOTL 4 LPPAG OLY oozz Su E d SES 2 89 SM d q 94 6 2 o q gsw SH A K IN AGE gt IN ERA OOc 9 o 4 THS L Gd L y x OZZv IN 3119333 22 SS wA Od8tLLNM ZH yol YA ua LOJN LHO x v LLM Es X 149A DH MOS say39 5 snn d as 25 SE 3113333 P 9SZ v8c e SR s ECH ZO 1 oBp303 0201 LZ 2 9 N 2 Ov L do1r m INNOYI O N 19M 919 E m dei S SSVHO L SC Lo LL gc viva
34. n XLR Digital Input Codes AES EBU S PDIF Impedance 110 Ohm XLR 75 Ohm coax adapter 2200 Ohm XLR transformer balanced Pass through Termination AC Line Input Voltade 50 60 Hz switch settable 105 120 VAC or 220 240 VAC Power Requirement SV1 all SP1 all DST all 8 Watts SV2 all SP2 all SIS1 all 13 Watts SV3 all SP3 all SIS2 all 18 Watt Page 4 Dimensions TRU enclosure 19 Wx7 Dx1 H Desk top enclosure W x 6 D x 2x H 1 3 Instrument Identification The Super VU is identified by a model number and a three or four digit serial number The model number and serial number appear on a label on the back ofthe unit near the power cord All correspondence to your Logitek dealer or to the Logitek factory should refer to the model number and serial number 1 4 Wher Find Hel Logitek customer service personnel are available to help vvith any questions comments or problems you might have vvith the Super VU meter both during and after the vvarranty period Our hours of operation are SAM to 5PM central time VVe may be contacted in one of the follovving vvays By Phone 877 231 5870 USA 8 Canada or 713 664 4470 By Fax 713 664 4479 By E mail help logitekaudio com By Mail Logitek Electronic Systems Inc 5622 Edgemoor Drive Houston Texas 77081 USA Super VU Instruction Manual SECTION 2 PREPARATION FOR USE 2 1 Initial nspection Check the shipping
35. orp Tinsley Park IL SI Signal Transformer Inwood NY SR Schurter Inc Petaluma CA SS Schott Corp Minneapolis MN SY Stanley Battle Creek MI TI Texas Instruments Inc Dallas TX Super VU Instruction Manual Page 15 SECTION 7 DIAGRAMS Page 16 Super VU Instruction Manual 56 91 rE UDr 1 MOJbpI uauodwog AlddAS NAN TAG DAS Aluo ZAN PUD ZSIS s spouw uo p sn DID Son o oSou xx r ca HS z S epou Aruo indui IP5 1 IP uo pesn ou 191 1ON 6 S FGSOLH OOL 65 11 co ES E 8 OVA OVA C GND 4 Bec e 0089 LL if Nu 170 DOES v di LO lt H OGA64 U 1040 WER 209 9489 bid 9L tZ 3 1 LL L lt y IMS 1 O LLP LMS lle AOIlQ O duo bd Page 17 Super VU Instruction Manual Super VU Instruction Manual
36. ounting screw for marring the front panel finish Desktop Enclosure The Super VU desktop enclosure is designed to sit on any flat surface The front of the meter may be an gled up for easier viewing by raising the bale located on the bottom of the box While flow through ventilation is not necessary the units should not be mounted directly above equipment which produces significant heat such as equipment using vacuum tubes The unit should never be oper ated ifthe ambient temperature is above 55 degrees C 131 degrees F 2 5 Connecting Mains Power Connect the meter to the power mains with the en closed power cord The unit is factory set for 115VAC operation but 230VAC operation can be selected via a slide switch located next to the power transformer in Super VU Instruction Manual side the unit To gain access to the voltage select switch remove the enclosure top cover The switch is located adjacent to the large power transformer 2 6 Input Selection on Dual Input Models If the digital receiver can lock onto an input signal then the meter will display that signal whether it con tains errors or not If no signal is connected to the digi tal input orthe data rate is out of the receiver s capture range then the meter will display the analog signal This happens even if nothing is connected to the ana log inputs The Super VU can be forced to display only one input by connecting a remote switch to the
37. pin large header locking 3 pin large socket Power entry module fuse holder Switches Slide DPDT Transformers 8V 3A international rating Super VU Supply circuit card Power cord North America 5 2 Digital Dual Input Control Card C1 C2 4 C5 10 C11 C12 D1 2 IC1 IC2 IC3 IC4 IC5 IC6 IC7 Super VU Instruction Manual Capacitors 047uf 1000V ceramic 10uf 25V tantalum 1 uf 50V SMD 25pf 1000V ceramic 15pf 1000V ceramic Diodes 5 4V zener Integrated Circuits AES EBU receiver without uP port 5VDC regulator 100 mA 5VDC regulator 1 5A Watchdog timer uP reset PROM 128K 120ns DSP 16 bit 2K 1K 3 to 8 decoder SMD LOGITEK PART NUMBER IL 688LBA025M2CD NC 100MF50ME2 MI UFS1E101MPJ TI LT1054CN EM 100 083 10 1003 GI GBPC 602 LF 218 500 PN MLSS156 3A PN CE156F20 3A SR 6200 4115 CK L202 121MS02QE SI IF 24 16 LG 253B BE 17251 CE CW 20C473K AV TAP106K025HSB NC NMC1206Z5U104M50T CE DD 250 CE DD 150 GI 1N4734A CS CS8412 CS MO MC78L05ACP MO MC7805CT MM MAX1232CPA MC 27C128 12 L AD ADSP 2105KP55 MO MC74HC138D Page 7 7 SYMBOL DESCRIPTION LOGITEK PART NUMBER 1 pc 1 pc 1 pc J1 J3 J5 7 J1 P2 P3 P4 P5 7 Y1 R1 Page 12 8 pin dip socket 32 pin PLCC socket 68 pin PLCC socket Connectors 3 pin large socket 3 pin socket 2 pcs 10 pin dual rovv socket Female XLR Male XLR 6 pin header 3 pin large header locking 10 pin dual
38. rm a self calibration routine for about half a second If the meter has undergone a substantial temperature change it may generate noise up to 70 dBFS until it undergoes a calibration cycle The three supply voltages from P3 are EMI isolated by ferrite beads FR1 FR2 and FR3 before connecting to the other circuitry IC5 and IC6 supply low noise regulated 5 VDC to the analog portions of the cir cuit The digital part of the data converter gets its 5 VDC from the DSP control card Page 10 Super VU Instruction Manual SECTION 5 REPLACEMENT PARTS LIST All replacement parts are stocked in depth at the Logitek factory Most are also available through local electronic parts distributors For your convenience in purchasing replacement parts locally we include the following paris list All Logitek part numbers consist of a two letter manufacturer code followed by that manufacturer s standard part number for the item A list of manufacturers arranged alphabetically by manufacturer code follows this parts list in Sec tion 7 All resistors are 1 4 watt 596 tolerance unless otherwise noted YMBOL 5 1 Power Supply Ci C2 C3 4 IC1 1 pc RT1 F1 P1 Ji J2 S1 1 pc 1 pc DESCRIPTION Capacitors 6800 uf 25V electrolytic 1uf 50V ceramic disc 100uf 25V electrolytic Integrated Circuits Charge pump 8 pin dip socket Rectifiers 6A pc mount 240V Fuses 1 2 amp slow blow 20mm Connectors 3
39. rovv header Crystal 12 288 Mhz crystal Resistors 2200 110 75 1000 100K 100K 296 5 position bussed 20K 8 position isolated SMD 10K Switches Dip switch block Dip switch block Transformers AES EBU Ultra VU Dual Control circuit card Capacitors 75pf 1000V ceramic 1uf 35V tantalum 2200pf 50V NPO ceramic SMD 4 7u1 25V tantalum 1uf 50V ceramic SMD 1uf 35V tantalum 01uf 50V ceramic SMD 470pf 50V NPO ceramic SMD 2200pf 50V NPO ceramic SMD 1uf 35V tantalum 75pf 1000V ceramic 470pf 50V NPO ceramic SMD 1uf 50V ceramic SMD 4 7uf 25V tantalum 1uf 50V ceramic SMD 01uf 50V ceramic SMD Tuf 35V tantalum 10uf 25V tantalum 15pf 1000V ceramic 25pf 1000V ceramic 1uf 50V ceramic 10uf 25V tantalum Diodes 5 4V zener EM 100 083 10 1003 EM 150 032 11 02 EM 150 068 11 02 PN CE156F20 3A PN CE100F28 3A PN 050 010 455 NT NC3FK H NT NC3MK H PN MFSS100 6A PN MFLS156 3A PN 051 010 153 CT MP122 CT 770 61 R104 CT 767163203G CT 194 8MST CT 194 2MST SS 67129600 LG 265 CE DD750 AV TAP105K035HSB NC NMC1206NPO222K50TR AV TAP475K025CCS NC NMC1206Z5U104M50T AV TAP105K035HSB AV 12065E103MATMA AV 12061A471JATMA NC NMC1206NPO222K50TR AV TAP105K035HSB CE DD750 AV 12061A471JATMA NC NMC1206Z5U104M50T AV TAP475K025CCS NC NMC1206Z5U104M50T AV 12065E103MATMA AV TAP105K035HSB AV TAP106K025HSB CE DD 150 CE DD 250 CE UK50 104 AV TAP106K025HSB GI 1N4734A Super VU Instruction Manual SYM
40. s D vse vse vse ES vse ER El D s6ss 1351 ssr ssr ssr ssr EE los 61 ose SSC gsr SSC SSC Er ban TA 4 ZSE 256 ZSE 5 252 256 2095 DOES 6122 XVW st 6 40 82 WOJBDIJ jusuodwo AV 145 10 0 434 5 GOGC 9 1 osea lelellgllg z lllolellgl HIRIE g 9191919191019191919 2 1912121412091212121 91 p 1 Cd 001G 0015 OLS H C Ly 221 Ze 121 CH 5 22 Nnnnnnnnnnnnn An HHHH HHHH Hn N 000000 aan leidas tira ano eel HIRIE Ld KIC CHC cc ci ic ic z z z ziz ciee ETE TT rini 111 111 Page 25 Super VU Instruction Manual A LO gitek TWO YEAR LIMITED WARRANTY Logitek Electronic Systems Inc warrants its pro fessional equipment excluding Logitek Software whi
41. s filter formed by R10 R11 C3 and C4 The resistors also form a 9 dB pad with the input impedance of the balanced receiver IC4 IC4 provides an additional 6 dB pad betvveen its input and output These pads allovv 20 dBu input signals to be handled by the 5 volt supply rails The output of IC4 is unity gain inverted by op amp IC2b and fed back to the reference input of IC4 This enables IC4 to pres ent an identical resistive load on its two input pins In put gain is adjusted via trimpot R9 which is the feedback resistor around gain stage IC1b MPORTANT Only replace IC2 with an op amp which is slower than the SSM2143 such as the TL072 used here A faster op amp like the NE5532 will cause the output of IC4 to oscillate kk ck ck ck ck Ck ck Ck ck ck Ck ck Ck ck ck Ck Ck Ck ck ck ck ck ck kok kok Signal from IC1b is fed through antialias filter R14 C8 and DC isolated by C11 before connecting to the left input of the sigma delta analog to digital converter IC7 The right channel connects to the converter via similar circuitry The 12 288 MHz master clock input to the ADC is generated by a crystal oscillator located on the DSP control card Combined left and right audio data is sent synchronously data clock frame sync to the DSP in 64 bit strings via connector P3 The reset sig nal from the DSP control card is also connected to the ADC The DSP activates the reset once a day which causes the ADC to perfo
42. tion switch S1 which connects the dual pri maries of transformer T1 in series for 230VAC operation or parallel for 115VAC operation The dual secondaries of T1 are wired in parallel and loaded with a full vvave bridge rectifier RT1 The DC output of RT1 is filtered by capacitors C1 and C2 and fed to the red and green output pads The voltage should be be tween 8 to 10 VDC with less than 5 volt of ripple Analog input models will also have a charge pump consisting of IC1 and C3 that feeds filter C4 and the black output pads The voltage should be 8 to 10 VDC with less than 1 volt of ripple Jumpers soldered to the output pads feed power to one or two meter control cards WARNING Dangerous voltages are present on the bottom of the power supply card Always disconnect the AC power cord when servicing this circuit board kk ck ck ck ck ck ck ck ck ck Ck ck Ck Ck ck Ck ck Ck Ck ck k Ck ck ck k kok 4 6 Digital Dual In ntrol r Power from input connector P4 is connected to volt age regulators IC2 and IC3 as well as display board connector P6 IC2 is a 5VDC regulator that feeds power to the analog front end of data receiver IC1 The voltage is filtered by C2 C6 and clamped against over voltage and voltage reversal by D1 IC3 is a 5VDC regulator that feeds the digital portion of IC1 and all other circuits on the control board The output voltage is filtered by C3 and clamped by D2 Distributed power filtering is s
43. to extreme temper atures or excessive moisture in the atmosphere Light bulbs batteries potentiometers or other equipment not manufactured by Seller shall carry only the warranty if any of the original equipment manu facturer in effect at the time of shipment of this order and Seller s obligation under this warranty shall be limited to such adjustment as Seller may obtain from the original manufacturer This limited warranty is void if equipment is modi fied or repaired without authorization subjected to misuse abuse accident water damage or other ne Page 26 glect or has had its serial number defaced or removed No obligation is assumed by LOGITEK to update previously manufactured equipment Specifications are subject to change without notice EXCEPT AS SPECIFICALLY PROVIDED HEREIN LOGITEK MAKES NO WARRANTY REPRESENTATION PROMISE OR GUARANTEE EITHER EXPRESS OR IMPLIED STATUTORY OR OTHERWISE WITH RESPECT TO THE EQUIPMENT USER DOCUMEN TATION OR RELATED TECHNICAL SUPPORT IN CLUDING THEIR QUALITY PERFORMANCE MERCHANTABILITY OR FITNESS FOR A PARTIC ULAR PURPOSE IN NO EVENT WILL LOGITEK BE LIABLE FOR INDIRECT SPECIAL INCIDENTAL TORT ECONOMIC COVER OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF OR IN ABILITY TO USE LOGITEK PRODUCTS EQUIP MENT OR SERVICES INCLUDING WITHOUT LIMITATION DAMAGES OR COSTS RELATING TO THE LOSS OF PROFITS BUSINESS GOODWILL DATA OR COMPUTER PROGRAMS EVEN IF ADVISED
44. upplied by C4 7 8 9 amp 10 On power up the DSP is kept in reset by IC4 until the power has stabilized ensuring a good power on reset IC4 also contains a watchdog timer that will re set the DSP if its ST pin in not taken low at least once every 150 mSec This pin is normally pulsed low every 5 mSec by the left bargraph load signal The DSP IC6 is clocked by a 12 288 MHz crystal oscillator consisting of Y1 C11 C12 and an internal driver IC6 pin43 is a buffered output of the oscillator The first thing the DSP 1C6 does after reset is copy its startup program from EPROM IC5 to internal RAM memory That program executes once and then loads the main program from EEPROM which exe cutes continuously Note thatthe 8 bit data bus is con nected to the middle byte of the DSP s 24 bit data port Super VU Instruction Manual The rear panel programming DIP switches S1 S8 are also connected to the DSP s middle data byte via isolation resistors R10 and control that portion of the data bus when neither the DSP nor the EEPROM out put is active The DSP inputs the switch positions via a read to address zero Front panel pushbuttons S11 12 13 are connected to the high byte ofthe DSP 24 bitdata portvia connec tor P3 and isolation resistors R9 Serial data is sent synchronously data clock load to the display driver chips via the display connec tor P6 in 32 bit strings Data is placed on the top bit bit 23 of the DSP data port an
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