User Manual
Contents
1. Word Clock AES3 DARS The handling of Dolby and DTS files is identical to wave files described in the previous chapter rie CONFIG 051 DLBY amp cth idi Lu dEF Hz SYC IT Hi e YB OkH2 Set FRO NONLIN FCH ho EHFH ADAT The test signals in the directories are sorted by non linear for mat type Select the desired signal format DLBY or DTS Use the rotary wheel to select the group symbol 1 Confirm with Enter Select the desired format Confirm with Enter IBUN Dolby DTS Signals INTi AUDIO Select the file symbol 2 with the rotary wheel Confirm with Enter Select the desired signal with the rotary wheel Confirm with Enter PONDS The order sequence of the files is sorted first by file extension e g file 001 and secondarily by actual file name This enables maximum flexibility in grouping similar test signals together 39 INTi AUDIO Name CH_ID_L CH_ID_C CH_ID_R CH_ID_LS CH_ID_RS Grim IBEEE PNOISE PNOI_LFE POLARITY SINE_80 SINE_400 SINE_997 SINE_1K SINE_10K VOICE 40 Dolby DTS Signals Test signal On each of these channel ID files There is the spoken channel identification followed by a 400 Hz sine signal Spoken channel identification with pulsed 80 Hz sine signal on LFE channel ink Noise 20 dBFS L C R LS RS 20 20 000 Hz LFE 20 120 Hz ink Noise 20 dBFS 20 120 Hz olarity test signal ine 80 Hz O dBFS on all channe2. NTi Audio AG Im alten Riet 102 9494 Schaan Liechtenstein Europe Tel 423 239 6060 Fax 423 239 6089 E Mail info nti audio com Web www nti audio com NTI Americas PO Box 131027 Tigard Oregon 97281 USA Tel 1 503 684 7050 Fax 1 503 684 7051 E Mail americas nti audio com Web www ntiam com NTi Audio is an ISO 9001 2008 R ENet J certified company All rights reserved All information subject to change without notice Version 1 12 Dec 2011 Software 1 12 Minirator is a registered trademark of NTi Audio EXEL XL2 Digilyzer Digirator and MiniLINK are trademarks of NTi Audio NTI China Room 722 7F Building 6 3A No 1388 Bin He Rd 215000 Suzhou China Tel 86 512 6802 0075 Fax 86 512 6802 0097 E Mail china nti audio com Web www nti audio com cn NTI Japan Ryogokusakamoto Bld 1 8 4 Ryogoku 130 0026 Sumida Ku Tokyo Japan Tel 81 3 3634 6110 Fax 81 3 3634 6160 E Mail okayasu nti japan com Web www nti audio com jp IATROGU COM oi saadenensadceden se doh savedesvaanetandebesaaauhsin daeeatenence sone 4 Notes musana a A EAA 5 Items included in the package ssssiiiseseeeiisererere een 6 ACCESS OMNIGS aonane i E 6 COMMECHONS iem a a NN 7 Buttons and operating elements 0 ceeeeeeeeeeee 8 The screen display c cccccccececeeeeeeneeeeeeeeeeneeeeeeeseaes 9 The main MENU cssccssniecsscenencadencetendanencanag dan tecersaneonduons PO
3. USB connection JNTi Overview AUDIO 4 wave Selection of the test signal 5 freq Setting the output frequency Also directly jumps to the PARAM menu with the SWEEP and CHIRP test signals and to file selection with FILE DOLBY and DTS 6 mute When pressed it illuminates to indicate you 3 2 have switched off Muted the output signal The button also lights up during the cycle pauses of the PNOISE and CHIRP signal waveforms 7 On Off Switches the instrument Power off if held down 8 L 6 for one second Also switches the back lighting on and off with a shorter press 1 esc Terminates an entry and jumps to the top menu level 8 sens Changes the sensitivity of the frequency and level settings 2 Rotary Slow rotation wheel Precise setting of the value 9 level Setting the output level You can set the output Fast rotation signal unit to dBF or Setting the value in larger steps The following signals have a fixed output level 3 Enter Confirming a selection DTS DOLBY TRANSPAR I O DELAY Fete AB COHFIGI C SINEWAVE LUL ALAA JEF LARA RH SYC INT Hi Z FRa LINEAR FCH YB OkH2 Set ho EXFH ACHA Menu bar Battery symbol If the battery symbol lights up the batteries are almost completely discharged and must be replaced Carrier signal interface set tings Audio signal generation set tings Overview JNTi AUDIO Fad A B CONFIG D
4. button INTi AUDIO Operation 3 Turn the rotary wheel to set the desired time 4 Confirm the entry with the Enter button AUTO The backlight will be switched on automatically during opera tion and will be switched off again after a period of time MANUAL Press the On Off button to switch the background lighting on and off You can choose between Auto and Manual 1 To do this select the Backlight 3 function with the rotary wheel 2 Press Enter 25 INTi AUDIO Operation Displays the version number with the possibility to carry out a firmware update for the DR2 4 see Updating the Instru ment You can read out the instrument s serial number 5 from the bottom line Changing the contrast of the screen display To do this proceed as follows 1 Hold down the esc button and turn the rotary wheel until the desired contrast is obtained 26 With the DR2 you can store your current instrument settings as configurations and recall these at a later date 10 configuration storage locations are available to you 1 Using the rotary wheel select CONFIG in the menu bar 2 Confirm with Enter GEHERATOR A E COHF IG STORE RECALL 3 Select STORE and confirm with Enter lconfig_3 SYT i A Config_ w Select a memory location with the rotary wheel and store your configuration by confirming the selection with En ter Us
5. signals refer to audio levels prior its coding into the non linear format Minor level differences may occur due to the encoding process 42 The channel transparency test verifies whether the audio and auxiliary data of a digital transmission channel are transparently transmitted The transparent transmission is crucial for non linear PCM formats such as surround sound The verification always covers both audio channels AnA COHFIG 24 BIT 3 FRO HOHLIH PCM Weir 1 2 SYC IT Hi Z 4B 0kHz Set FRO NONLIN FCH ho EHFH 2CHh 1 Result of the analysis 2 Status of the validity bit of the input signal 3 Channels status informa tion of the input signal Measuring Functions INTi AUDIO The displayed validity bit 2 and channel status details 3 are for information only They are not part of the transparency measurement The test signal used in the DR2 is a short deterministic noise sequence The signal stream applied to the SYNC input is mon itored and verified for a 16 20 or 24 bit correlation Preamble Auxiliary LSB Audio Data MSE DVi RUS ECS RE 0 3 4 7 8 1112 27 28 29 30 31 43 INTi AUDIO Measuring Functions A nontransparent signal is indicated by the DATA CHANGED message This means that the received bit pattern is different to the expected bit pattern This could be caused by any chang es in e g the gain setting or in the word length with added dither The sampling frequency i
6. START symbol E with the rotary wheel LUL Output level o 29 INTi Linear PCM Test Signals AUDIO Using the MODE symbol you can run the test signal in the following modes Once only H Plays the test signal once Continuous Repeats the test signal You can define the following parameter for this test signal LUL Output level f The frequency display is for information only The current frequencies will be displayed here once the SWEEP test signal has been started PARAM You can configure the signal sequence here 30 STOP f 1 kHz START f E 1 tr The sweep recording starts as soon as the frequency drops from 1 kHz to fSTART The end of the sweep is signaled by a falling frequen cy rade Ate COHF IG CHIRP FARAH b Hz 4B 0kHz Set ho EHFH 2 CHh LUL ALAA JEF SYC IT Hi e FRO LINEAR FCH A Chirp is the name for a signal whose frequency continually changes over time also known as continuous sweep It is used for the recording of frequency responses the measurement of impulse responses and the acoustic assessment of rooms 1 Select the START J symbol with the rotary wheel 0 Using the MODE symbol you can run the test signal in the following modes INTi AUDIO Linear PCM Test Signals Once only Continuous Plays the test signal once Repeats the test signal after an adjustable pause toause You can define the
7. be synchronized and locked to external devices In order to do this the sync signal is connected to the universal sync input circuitry via a female XLR connector to the DR2 An adaptor for connecting a BNC cable to the XLR input is also included as a standard ac cessory item with the DR2 The Digirator recognizes clock sources automatically as they are connected There is no need for a manual selection of the sync format The following formats are supported e AES3 DARS e Word Clock 20 kHz to 216 kHz continuous 32 kHz 100 ppm 44 1 48 kHz x1 x2 x4 100 ppm PAL 25 Hz and NTSC 29 97 Hz e Black Burst fs 48 kHz 2 SYNCIN A Ana XLR 1109 1 75 110 75 Q High Z a3 A Clock Processing Word Clock Blackburst 75 Video INTi AUDIO Overview AES3 as well as Word Clock signals are separated by an electri cally isolated transformer terminated with the nominal imped ances of 110 ohm or 75 ohm But Hi Z mode is also supported allowing trial operation of the DR2 in parallel with other de vices The extracted sampling frequency is fed into a clock recovery stage with high jitter attenuation This ensures stable and opti mized signals at the DR2 output With input sampling frequen cies that deviate more than 100 ppm from the AES standard sampling frequencies no clock recovery will be executed Un der special circumstances this might
8. 1 x 5 5 x 9 5 mm plug and connection Only use DC power supply units with a voltage from 5 to 8 volts anda current of at least 500 mA Do not use a switching power supply Unbalanced connections in combination with a switching power supply can lead to noise interference and an unpleasantly high interference level when plugging in and out Damage caused by using an inappropriate external DC supply is not covered by warranty INTi AUDIO Overview The Digirator features two electrical outputs that are equipped with a shared high quality transformer Both outputs are earth free and resistant to externally applied Phantom Power Digital Audio Transmitter 2 HoH AES EBU i XLR 110 Q I AES3 id S PDIF RCA 75 Q PIN 1 2 PIN 2 3 PIN 3 The outputs feature interface carrier levels with fixed levels AES3 6 0 Vpp open 3 0 0 2 Vpp into 110 Q S PDIF AES3 id 2 0Vpp open 1 0 0 2 Vpp into 75 0 The concurrent use of both electrical out puts leads to reduced interface carrier lev els that can lead to malfunction For generating an AES3id compatible signal please use the supplied RCA to BNC adapter The output signals meet the AES3 id standard and work well for S PDIF signals The optical output may be used concurrently with one of the electrical outputs It can be configured either for 2 Channel or for ADAT format The sampling frequency of the Digirator can
9. Digirator DR2 has been carefully tested during produc tion and performs to the specifications listed in the Technical Data chapter NTi Audio recommends yearly calibrations of the instrument For the calibration of your instrument kindly follow the service guidelines at www nti audio com service We the manufacturer NTi Audio AG Im alten Riet 102 9494 Schaan Liechtenstein Europe CE hereby declare that the Digirator DR2 product approved in 2007 complies with the following standards or other standard documents EMC 89 336 92 31 93 68 Harmonized standards EN 61326 1 This declaration will become invalid if modifications to the in strument are carried out without the written approval of NTi Audio Date 01 12 2007 Signature HO flecho Position Technical Director Dispose of the instrument in accordance with X the legal environmental regulations in the coun try The instrument must not be disposed of in the household gar bage At the end of its service life bring the instrument to a collecting point for electrical recycling in accordance with the local legal regulations Contact the respective authorities for the valid environmental regulations in the country LL ZL P 00S J
10. Function selection 2 Save and Recall instrument configurations 3 Select and configure output channels individual mute or invert JINTi Overview AUDIO SHEEP pol LUL AWARE 1 AAB KHz 1 Test signal 2 Start Stop for certain test signals 3 Parameters setup 4 Single continous mode for certain test signals 5 Output frequency 6 Units for the output level 7 Output level SYne INT Hi e 4B OkH2 Set FRO LINEAR FCH ho ERFH 2CHI 1 Settings and display of sampling frequency and clock source 2 Configuration and status display of the optical out put 3 Channel status settings In order to be always able to use the Digirator flexibly we rec ommend the use of batteries Only use 3x AA LR6 batteries The battery consumption increases at higher levels and is based on the connected load During operation the battery temperature may increase noticeably This is not a defect The instrument can also be used with rechargeable batteries You can also connect the Digirator to mains power with a DC power supply unit To do this you will need the correspond ing DC power supply accessory unit which you can order from NTi Audio Overview INTi AUDIO We recommend you use only the NTi Audio DC supply But if you want to make use of a different DC power supply unit you must observe the following Use an electrically isolated non earthed linear DC power supply unit with 2
11. To prevent you from accidentally dropping the DR2 a hand Pull the hand strap through the opening strap is supplied with the instrument You can also fit the hand 2 Pull the rear part of the hand strap through the loop of the strap when the protective shock jacket of the DR2 has been front part fitted 3 Pull the hand strap tight Connect the Digirator to your digital audio device using an XLR cable Note that the locking pin of the XLR connector will then be located on the lower side of the instrument Getting Started wNTi AUDIO Connect the Digirator to the digital input of the unit to be test ed using a good quality RCA cable Please note that not all RCA cables are suitable for digital audio use Connect the Digirator to the optical input of the unit to be test ed using an optical TOSLINK cable The cover flap of the output opens automatically with the insertion of the cable INTi AUDIO Operation To switch the Digirator on press the On Off button The dis play lighting is switched on To switch the Digirator off press the On Off button and hold it down for one second The menu bar is divided into three parts On the left hand side you can choose between the Generator Transparency Test I O Delay Latency and System functions ee A B COMFIG TRAHSFAR I 0 DELAY SYSTEM 1 Todo this select the left side of the menu bar with the rotary wheel and confirm with Enter 2 Select th
12. WENrSUDDLY siviseiea iss dia estiaee elated ane Characteristics of the OUtPUtS 0 0 0 0 cee eeeeeteeeeee Characteristics of the SYNC input Inserting the batteries Fitting the protective shock jacket Attaching the hand strap 2 0 Connecting the Digirator cccccccccceeseeeeteeeeseeeeee Switching Digirator on and Off 0 ccececeeeeeetteeeee 18 Navigation in the Menu bar ccccceeeseeeeeeeeeeteeeeees 18 Selecting a test Signal ccc ceeeeeeteeetseeeeee 19 Setting the parameters cccc cc cccccecccecessssaeeeesensaes 20 Setting the sampling frequency 0 cccceeeeteeeee 22 Setting the Channel Status ccccccccceseceeeeeeneees 23 Configuring the output channels 23 Systeri Settings sireni na n a E 25 Conifig ra tiOn S seseante A 26 Table of contents INTi Signal generation ccc cee ecceececeseceeseeseseeeesseeeeeaes 28 SIN Casa hess da ceccosm A sates teasing ueateenes 29 SWEEP acts yates derucsnctine day anand a uneatete see tosadiemeat ions 29 CTI eae tes sea cecstesd aes eve ee eee eens ease ates 3 Delay TeSt ceeccceeeccecceeceeeeeeeeeeceeeeeeneceeeeeeeesnneeeeeetees 32 PINK NOISE twee tie i ctiesceds obdenciens E e mete avo 33 White NOISE ccccccccceeceeeeeeeeeeeeeeeeeeeeeeeeeteneeeeeeeenes 34 POLARITY criaria hue an avis A aiidewn ae 34 Wave File Player cccecececcceeecseeeeeeeeeeeeeeeeeeteneeeeeeees 35 Signal
13. al signals that do not appear in normal audio operations Such generated signals may damage or destroy systems and loudspeakers if not operated carefully Damage from moisture Do not use the instrument in damp environments The instrument can be permanently damaged by penetration of water moisture or any fluid Danger of electric shock Never connect the instrument to a power output Non compliance could result in injury to persons and or damage to property that is not covered by the warranty guarantee Damage caused by opening the instrument Never open the instrument The instrument can be damaged if the housing is opened and your warranty will be invalidated aNTi Basics AUDIO e Digirator DR2 e Pouch NTi Audio 600 000 302 e Protective shock jacket e System Case NTi Audio 600 000 020 e Test signal backup DVD e Mains Power Adapter NTi Audio 600 000 333 e Operating manual e Calibration Certificate NTi Audio 600 000 018 e XLR BNC adapter Neutrik NA2MBNC e RCA BNC adapter e USB cable You can find further additional information on the website e Hand strap www nti audio com 2 Overview of the Instrument Connections The Digirator provides the following connections Overview JINTi AUDIO 4 S PDIF and AES3 id output 75 Q 2 AES EBU output 110 Q Optical output 6 DC power socket SYNC input AES3 Word Clock Video
14. al1 wav e Signal1 wav e Signal2 wav e Signal2 wav NTi Audio delivers a set of demonstration wave files with the DR2 These wave files aia es are licensed to you only for playback with an NTi Audio unit Any further usage is forbidden 3 Open one of the sub folders in the WAVE folder If necessary you can make use of the other standard possibilities of a removable data medium For example you can copy WAV files from the DR2 onto your computer or delete unnecessary files 37 aNTi Dolby DTS Signals AUDIO Dolby and DTS signals are compressed multi channel audio signals They are transmitted as non linear PCM signals and need to be processed by a Dolby DTAS decoder before they can be used as multi channel audio The available test signals have been externally encoded and are implemented as WAV files All DOLBY and DTS signals stored in the DR2 have been encoded and recorded on DOLBY and DTS certified equipment The sampling frequency is fixed to 48 kHz and may by synchronized to an external reference of 48 kHz within 100 ppm accuracy The wave files are stored in the sub directories DOLBY and DTS All files stored in these folders are treated as Non Linear PCM signals and the channel status is automatically marked accord ingly 38 Signal Digital Audio Generator Audio signal Clock signal not active Transmitter 48 0 kHz Video PAL NTSC
15. andwidth of 24 kHz sine signals can be synthesized up to 20 kHz Settings violating the Nyquist theorem are not prohibited as the sample rate con verter will simply attenuate these signals e g Sine signal with f 20 kHz at a sampling rate of 32 kHz is attenuated because sampling rate should be at least twice the signal frequency 28 Sample Rate Converter Signal Generator L fs 48 kHz INT ne fs 20 216 kHz l LEXT Audio signal Clock signal not active Digital Audio Transmitter 32 0 kHz 44 1 kHz 2 4 48 0 kHz 2 4 Video PAL NTSC Word Clock AES3 DARS Linear PCM Test Signals INTi AUDIO rg AE COHF IG ee A COWF IG STNEHAVE SWEEP EY LUL ALAA JEF LARA RH2 LUL ALAA JEF 1 ARB KH SYC INT Hi Z 4B 0kHz Set Sune INT Hi Z 4B OkHz Set FRO LINEAR FCH ho EXFH 2CHh FRO LINEAR FEH ho EHFH 2CHh Pure sinusoidal signals are required for many standard audio Stepped sweep signals with a resolution of up to 1 12 octave measurements The Digirator provides a wide and adjustable can be generated over a freely selectable frequency range An output level range and selectable output frequencies audio analyzer like the Minilyzer or Digilyzer from NTi Audio can automatically trigger to this signal sequence to measure the frequency response You can define the following parameter for this test signal f Output frequency 1 Select the
16. d to login or create the My NTi Audio Ac count The web page My Products opens Select the product type and enter the serial number Confirm with Register Now the product is listed in the table My Products 53 INTi AUDIO Further Information NTi Audio guarantees the function of the DR2 and their indi vidual components for a period of one year from the date of sale During this period defective instruments will be repaired free of charge or will be replaced Opening the unit case voids the guarantee These guarantee provisions also do not cover accessories nor damage caused by accidents immersion in or exposure to water or other fluid transportation incorrect use or carelessness nor the installa tion of any parts that were not delivered with the instrument the loss of parts connection to any AC mains voltage nor oper ation with non specified input voltages adapter types or incor rectly inserted or leaking batteries In particular NTi Audio ac cepts no responsibility for incidental or consequential damages of any kind The guarantee will be voided if repairs or service work are carried out by any third parties who are not part of an approved NTi Audio Service Center 54 In the case of faulty functioning or damage please contact your local NTi Audio partner for assistance If your instrument needs to be returned for service kindly follow the service guidelines at www nti audio com service The
17. e desired function with the rotary wheel 3 Confirm the selection with Enter In the middle section of the menu bar you may mute or invert individual channels of the output signal In the right most menu you can save and recall configurations see Configurations Operation INTi AUDIO You have two choices for selecting test signals You can use either the direct access buttons or the rotary wheel 1 Ensure that GENERATOR 1 is selected in the menu bar 2 Select WAV 2 with the rotary wheel 3 Press Enter 1 Ensure that GENERATOR 1 is selected in the menu bar 2 Press the wave button i rae AE COHFIG 2 HAN ae Mey trp ERI FHOTSE DOLEY DELAY FILE LuL B AB EF 1 500 kHz 3 Select the desired test signal with the rotary wheel PRAT EINEAN EEN TENE ZEHN 4 Press Enter 4 Select the desired test signal with the rotary wheel 5 Press Enter wNTi Operation AUDIO You have two possibilities for setting up the parameters of the test signals Use either the direct buttons or the rotary wheel 1 Turn the rotary wheel 1 Press the level or freq button GEHERATOR A E COHF IG PNOISE te iris 2 Turn the rotary wheel to set the parameter mye 6 06 JEF Hz 3 Confirm the setting with the Enter button m SYC INT Hi Z 4B OkHz Set FR LINEAR FEH ho EHFH 2CHh 2 Confirm your choice with the Enter button 3 Turn the rotar
18. e the rotary wheel to select CONFIG in the menu bar Confirm with Enter GENERATOR Ase RECALL Select RECALL and confirm with Enter Select the desired configuration in the Selection menu and confirm with Enter You have the possibility of transferring stored configurations to another device Seo Operation INTi AUDIO Connect your DR2 to a computer via USB Select the CONFIG sub folder Copy this data to your computer Connect another DR2 to the computer via USB Copy the previously copied data into the CONFIG sub fold er by overwriting the data therein In order to easily remember configurations you may rename them For altering the file names connect the DR2 to a computer via USB and rename the files in the CONFIG folder Only the first 10 configurations are shown in the display 27 INTi AUDIO Linear PCM Test Signals The Digirator DR2 flexibly generates linear PCM test signals such as sine noise or even other arbitrary signals from 48 kHz wave WAV files The match and lock of the selected sampling rate to the applied reference signal is handled by an internal sample rate converter This configuration ensures that the generated audio signal frequency is not dependent on the sampling rate but left un changed The sample rate converter featuring a high dynamic range of 144 dB does not affect the audio signal quality speci fication The generated audio signals feature a b
19. evel 34 rg de E CONFIG POLARITY LUL ALAA JEF 28 88 Hz Sune INT Hi Z 4B OkHz Set FRO LINEAR FEH ho EHFH 2CHh The saw tooth test signal is ideally suited for checking the po larity of loudspeakers The Minilyzer ML1 7 Acoustilyzer AL1 and XL2 instruments from NTi Audio detect this signal and use it to indicate polarity You can define the following parameters for this test signal LUL Output level f The frequency display is for information only The frequency cannot be adjusted rade Ate CONFIG FILE Fo MESSAGES 1 Optimize 5 LUL ZB AdEF Hz SYC INT Hi Z 4B OkHz Set FRO LINEAR FCH CCITT EH ADAT With the Digirator you can play back your own test signals and sequences from wave WAV files The test sequences will be seamlessly looped without pauses For a better overview wave files storage in the DR2 is organized using sub folders The DR2 is already equipped with a series of demo sequences in the WAV file format You can create a link to a computer at any time via the USB interface and can exchange existing WAV files or add new ones INTi AUDIO Linear PCM Test Signals You can define the following parameter for this test signal LUL Output level The output level of this test signal is adjusted in dBF dB full scale or Possible applications include for example e channel ID line occupation in use transmissions e Musical signals for the assessmen
20. following parameters for this test signal LUL Output level f The frequency display is purely for information only The current frequencies will be displayed here after the start of the CHIRP test signal PARAM Configuration of the signal sequence f l t CHIRP STOP f start 31 INTi AUDIO 32 Linear PCM Test Signals The normal fading in and out of any Chirp signal generates spurious frequency components leading to ripple in the frequency response The Chirp sequences of the DR2 are optimized for ripple of 0 2 dB maximum Chirp parameter combinations which would result in higher ripple are automatically corrected during input rg ee E CONFIG DELAYTEST LUL ALAA JEF Hz Sune INT Hi Z 4B OkHz Set FRO LINEAR FEH ho EHFH 2CHnh The Delay Test signal is a specially configured Chirp signal In combination with the Acoustilyzer AL1 or XL2 from NTi Audio it makes it possible to determine acoustic signal propa gation delay times You can find further information in the hand books for the AL1 Acoustilyzer or XL2 You can define the following parameters for this test signal LUL Output level rg ade A B COHF IG Hoo COHT 1 PNOISE cve Iris Hz YB OkH2 Set ho EHFH ACHA LUL ALAA JEF SYC INT Hi Z FRO LINEAR FCH The Pink Noise test signal is characterized by flat amplitude response per octave band of frequency or per any
21. generation c cece ceeeeceesseceesseeeesseeenseeeeeaes Test signals and formats Channel transparency testing W O Delay test Latency 2 0 0 eee c cece ceesseeeesseeeeneees Firmware UPCate ccc eeeecceeeeeeceeeeeeeeeeeeeeeeeeteteeeeeeeees 48 Faults and their Correction cccccceeeeeeeeeeeeeeeeeeeeees 49 Resetting to the factory SettingS eeeeeeeeeee 51 Reloading wav files cccccceecseceeeeteeteeeeeetenteeeeeeees 51 REGIST AION sirien n oanntead EaR 53 Warranty COnCItions 0 ccccceeeeeeeeeeeeeeeeeeettteeeeeeeeees 54 Declaration of Conformity ccccccccecceesseeeesseeeeeees 55 Information regarding disposal recycling 005 55 aNTi Basics AUDIO Thank you for purchasing the Digirator The Digirator DR2 is a reference grade digital audio generator with AES3 S PDIF and ADAT outputs As an extension to the common stereo audio test signals DR2 also supports Surround sound sequences for setup and testing of professional Dolby Digital Dolby E ProLogic Il and DTS in stallations The ultra stable internal clock generator can be syn chronized to AES3 DARS Word Clock as well as video signals It further supports the measurements of channel transparency and I O delay latency as well as clock frequencies Notes Basics INTi AUDIO Damage to equipment connected The Digirator is a test generator and thus allows creating exception
22. he DR2 that were installed at the factory The files are available on the Test signal backup DVD Trouble Shooting INTi AUDIO 51 INTi AUDIO Format Sampling Frequen cies Outputs Outputs Inputs Linear PCM Signals Non linear multi channel signals Wave File Format Frequency Settings 52 Technical Data Consumer Professional up to 24 bit audio XLR RCA 32 44 1 48 88 2 96 176 4 192 kHz Optical up to 96 kHz ADAT up to 48 kHz Accuracy 2 5 ppm e AES3 110 ohms XLR e S PDIF 75 ohms RCA e AES3id 75 ohms with RCA to BNC adapter e TOSLINK Stereo and ADAT XLR Sync input for e AES3 DARS e Video NTSC PAL e Word Clock using BNC to XLR adapter Sine Polarity Test Signal Delay Test Signal Pink Noise crest factor 4 42 White Noise crest factor 3 47 Playback of Wave Files A comprehensive library of pre encoded surround sound signals is available in the following formats e Dolby Digital e DTS e Dolby E e Dolby ProLogic II Sampling frequency 48 kHz Resolution 16 20 24 Bit Mono Stereo Range 10 Hz 20 kHz Step width min 1 digit steps Accuracy 0 01 Stepped Sweep Function Gliding Sweep Chirp Function Level Units Output Level Range Distortion THD N USB Functionality Flash Memory Display Auto Power Off Batteries Temperature Range Humidity Dimensions LxWxH Weight Frequency range Step width Sweep speed
23. hronization aborts With no Sync signal the DR2 switches back to its internal clock generation and transmits the test sig nal derived from its internal clock As soon as this transmitted signal again reaches the SYNC input the selector boxes for IMPEDANCE and CLOCK source will appear again Measuring Functions INTi AUDIO An intermittent appearance of INPUT IMPEDANCE and CLOCK SOURCE is a strong indicator that the device or system under test does not create its own clock l but regenerates the input clock To solve this loop back problem switch back to CLOCK SOURCE INTERNAL I Digital Audio Receiver I Analyzer i Signal Generator Digital Audio Transmitter For testing the transparency of a transmission channel you pro ceed as follows l 48 0 kHz 1 Connect the output of the DR2 to the input of the system Video PALA under test L Word Clock a AES3 DARS 2 Connect the output of the system under test with the SYNC input of the DR2 3 Select the settings for clock source and termination Audio signal clock signal not active 45 INTi AUDIO Measuring Functions The function I O Delay latency test determines the exact time delay which a piece of equipment or an entire system is intro ducing For this test the SYNC input connector of the DR2 is used for receiving the delayed signal aa COHFIG oy SS 133 5ms LAR ATSC Fro
24. is active channel B is muted B Channel A is muted channel B is active THI Channel B is has inverted polarity 180 23 INTi Operation AUDIO There are three operation modes available for the optical out put i Ah 2 channel mode AES ADAT mode 8 channels Channels 1 3 5 7 are fed from channel A of the din stereo signal while channels 2 4 6 8 contain the audio of channel B ies Optical output is switched off You may alter settings as follows 1 Select the value under the LED icon with the rotary wheel ett 2 Press ENTER to change the value 24 The optical output can operate up to the following maximum sampling frequencies 2 channel mode 106 kHz ADAT 55 kHz At any selected sampling frequency higher than the given limits the optical output is automatically disabled and the visual icon indicators behind the symbol will not be present to acHn ADAT You can adjust various system settings of your instrument To do this switch to System 1 in the menu bar using the rotary wheel and confirm with Enter The possible system settings are displayed 1 SYSTEM Power Sawe Backlight COHF IG 1a MIH 2 AUTO 3 1 88 4 G20 OF AZH Ag 5 Firmware SrH The Power Save mode switches the instrument off if no button has been pressed within an adjustable time period 1 Select the Power Save function 2 using the rotary wheel 2 Confirm the selection with the Enter
25. lead to suboptimal stabil ity of the output signal is an AES3 Signal intended for syn chronizing equipment Its channel status data are marked accordingly by setting the DARS Bits wNTi Getting Started AUDIO Only use AA LR6 batteries You will need 3 AA batteries The batteries may significantly warm up during operation This is not a malfunction The Digirator can also be operated with rechargeable batteries For best battery performance only use new batteries of the same type and manufacturer Open the battery cover Insert three AA LR6 batteries with the same state of charge paying attention to the marking in the battery compartment Close the battery cover once the batteries have been in serted Getting Started wNTi AUDIO The shock jacket protects the instrument against light impacts 1 Push the lower end of your Digirator into the lower end of without impairing it s easy operation It is recommended to the protective shock jacket leave it mounted 2 Push the upper end of the Digirator into the protective housing The protective shock jacket shields your Digirator against reasonable impacts that could occur in normal use You must further protect the instrument from extreme stress exposure to liquids and from extremes of heat or cold Please do not drop the instrument Damage caused by dropping or impact is not covered by warranty wNTi Getting Started AUDIO
26. ls ine 400 Hz O dBFS on all channels ine 997 Hz O dBFS on all channels ine 1 000 Hz O dBFS on all channels ine 10 000 Hz O dBFS on all channels Reference voice announcement on all channels 20 dBFS NNANNN DVD UD Length 0 25 0 25 0 25 0 25 0 25 0 25 0 30 0 15 0 15 05 0 15 05 0 15 0 15 0 21 Name D_20 D_51 E16_51 E20_51 E20_5120 PROLOG2 755K_20 755K_51 1509kK_51 Format Do Do Do Do Do Do by Digital 2 0 256 kbit s by Digital 5 1 448 kbit s by E 5 1 16 Bit by E 5 1 20 Bit by E 5 1 2 0 20 Bit by ProLogic IIx PCM Lt Rt 5 2 5 DTS 2 0 754 5 kbit s DTS 5 1 754 5 kbit s DTS 5 1 1509 kbit s Dolby DTS Signals aNTi AUDIO All Dolby and DTS signals stored in the DR2 are licensed to you and must only be used and played back on the DR2 Any further use of these files is strictly forbidden Due to the huge size of the non linear PCM signals not all files will fit into the internal flash disc of the DR2 at the same time The test signal backup DVD includes all available non linear PCM signals 41 INTi AUDIO Dolby DTS Signals Dolby ProLogic II The Dolby ProLogic II format is an uncompressed linear PCM format that codes the channel assignment in the L R phase relation You will therefore find the ProLogic II files in the WAVE folders not in the Dolby folder Levels All announced levels of the non linear
27. mes 2 SYC IT Hi Z 192 0kH2 Con LINEAR FCH ho EHFH OFF DR2 generates a short test burst every 2 seconds The SYNC input is continuously monitored and the delay calculated Level adjustments and minor distortion do not affect the measure ment result The sampling frequency can be selected to be either 32 44 1 or 48 kHz These frequencies can also be used for external syn chronization provided the accuracy is within 100 ppm 46 The sampling frequency of the input signal may be non syn chronized and range anywhere from 20 216 kHz Right after the connection of a signal to the SYNC input the DR2 queries for the desired termination impedance and after that whether the clock should be generated internally or syn chronized to the external source Also refer to the synchronization details outlined in the section Channel transparency testing For measuring the O delay latency of a device please pro ceed as follows 1 Connect the output of the DR2 with the input of the device under test 2 Connect the AES3 output of the device with the SYNC in put of the DR2 3 Make the proper settings for termination impedance and clock source The measured I O delay time latency is displayed in millisec onds 1 as well as in video frames 2 To alter between PAL and NTSC settings proceed as follows 1 Navigate the cursor with the rotary wheel to the field dis playing NTSC or PAL Q 2 Press ENTER to al
28. other con stant percentage unit of bandwidth up to its band limit high spectral density an infinite period gt 100 years and 20 kHz bandwidth Pink Noise is used as a reference signal for the setup of loudspeaker systems PA systems with a Real Time Analyzer RTA executing the required measurements When operated in the intermittent mode Pink Noise also forms the basis for reverberation time measurements INTi AUDIO Linear PCM Test Signals You can choose between the following test signal modes with the MOD setting 1 CONT generates a continuous test signal ILI generates a intermittent test signal You can determine the cycle times of the intermittent signal with the CYC setting 2 3 3 3 seconds of signal and 3 seconds pause These settings have no effect in the continuous mode You can define the following parameters for this test signal LUL Output level 33 INTi AUDIO Linear PCM Test Signals rade Ate COMF IG HNOISE LUL ALAA JEF SYC INT Hi e FRO LINEAR FCH Hz HB OkH2 Set ho EXFH 2CHh The White Noise test signal has a high spectral density Gauss ian amplitude distribution and a nearly infinite period gt 100 years White Noise is used for all measurements with FFT analyzers or where a linear frequency scale is used and has a constant signal power per Hertz and a 20 kHz bandwidth You can define the following parameters for this test signal LUL Output l
29. s fixed to 48 kHz but can be syn chronized to an external reference with 48 kHz within 100 ppm range External synchronization is very helpful for offline tests e g to record the transparency test signal on a record ing system and analyze as played back Also the test may also optionally be conducted using two DR2 units in different loca tions with one acting as the signal source and the other as the analyzer With a word clock or video signal applied to the DR2 it automatical ly tries to synchronize after query ing for the termination impedance choice With a valid AES signal ap plied the user should determine whether the DR2 should Sync slave mode or continue to run from the internal clock Master mode THPUT IMFEDAHCE Hi Z 750 CLOCK SOURCE SYHE THPUT IHTERHAL 44 In this mode the DR2 acts as a clock master and the connected device or system is synchronizing its clock to the DR2 Select this mode if the device under test is unable to generate its own clock or if the device under test automatically synchronizes to signals presented to its input In this mode the device under test is the clock master and the DR2 synchronizes to this connected device by selecting clock via SYNC INPUT Synchronization is necessary to prevent from losing samples through drop outs or glitches With no valid clock applied to the SYNC input of the DR2 the internal sampling frequency starts to drift and the external sync
30. selectable 10 Hz 20 kHz 1 1 1 3 1 6 1 12 octave selectable 0 5 5 s step Frequency range selectable 20 Hz 20 kHz Increment linear logarithmic Chirp speed 1 0 39 seconds per sweep dBFS 100 dBFS to 0 dBFS of the synthesized sine signal 138 dB 22 Hz 22 kHz AVG 1 kHz typical e for firmware update e mass storage device e 512 MByte e for storing wave files and configurations Graphical with back illumination 10 30 60 minutes or OFF e 3 x AA Alkaline dry cells or rechargeable equivalents e Battery life typ 10 hours continuous 0 to 45 C 32 to 113 F lt 90 rel humidity non condensing 152 x 81 x 43 mm incl protective shock jacket 310 g 11 oz incl batteries Register as a customer with My NTi Audio and benefit from the following possibilities Keep your products up to date Access free firmware and software updates Activate options Enable additional functions for your products Access premium content Access downloads information and specific support for your products Receive application and product news Subscribe to the NTi Audio Newsletter Get fast worldwide support Register your products for fast support Confirm your ownership Allows us to contact you with important product notifica tions and provides a product record in case of loss or theft INTi AUDIO Further Information Open the web page http my nti audio com You are prompte
31. t of PA systems e Playing back complex test signals Select the folder symbol 1 with the rotary wheel Confirm with Enter Select the desired folder with the rotary wheel Confirm with Enter AO N G 35 aNTi Linear PCM Test Signals AUDIO Selecting a wav file 1 2 3 4 SX Use the rotary wheel to select the file symbol Confirm with Enter Select the desired wav file with the rotary wheel Confirm with Enter The wav file will be played Loading your own wav files Wave files for the DR2 must conform to the following require ments 48 kHz sampling frequency Mono or Stereo 16 24 bit definition To load WAV files you will need a computer with the following minimum specifications e PC with Windows 98SE e Macintosh computer with OSX e Available USB port Connect the DR2 to the computer via USB 2 The DR2 appears on your computer as a removable data storage medium Open the WAVE sub folder on the removable medium If a wave file does not meet the requirements the playback stops and the mute button lights up continuously red 36 All the sub folders in the Wave folder now appear in the folder selection You may add additional sub folders to this folder level as required Linear PCM Test Signals INTi AUDIO O WAVE 4 Copy the desired files into the folder A O FOLDER1 O FOLDER2 O 5 e Sign
32. ter between time and video frames In case there is a non equal delay value for channels A and B the instrument will display the two different respective values in an alternating sequence The channel display 3 follows the actual displayed channel Measuring Functions fs 20 216 kHz I Analyzer Sample Rate Converter INTi AUDIO Digital Audio Receiver Digital Audio Generator Audio signal Clock signal not active Transmitter 32 0 kHz 44 1 kHz 48 0 kHz Video PAL NTSC Word Clock AES3 DARS 47 aNTi Updating the Instrument AUDIO You can find the firmware version of your instrument as fol In order to update the firmware you lows will need a computer with the following minimum specifications 1 Select SYSTEM in the menu bar 2 Confirm the selection with the Enter button e PC with Microsoft Windows 2000 or later e an available USB port e Internet access Kindly register your instrument at http my nti audio com for details see chapter Further Information Upon registration you may access the support page which offers e detailed update instructions e firmware revision history Proceed as follows to update the firmware 1 Select SYSTEM in the menu bar 2 Click on Firmware and follow the instructions on the screen of the DR2 48 Fault Fault finding The DR2 does not generate mute bu
33. tton blinks an output signal mute button lights up continuously Screen contrast poor Wave Files DTS or Dolby Wave files are not played back mute button lights up continuously Trouble Shooting Cause You have switched the instrument to Mute You have called up the Pink Noise PNoise test signal or you are in the Pause cycle of the Chirp test signal Cable not plugged in correctly or mis wired Contrast needs to be adjusted You have loaded a non sup ported Wave format INTi AUDIO Remedy Press the mute button Wait until the pause has ended Press the Start button Plug in the cable correctly and check pin wiring Press esc and operate the rotary switch to set the contrast Load a supported Wave format see page 36 49 INTi AUDIO Fault INPUT IMPEDANCE and CLOCK SOURCE window ap pears intermittently 50 Trouble Shooting Fault finding Cause You have selected SYNC INPUT but the device connected is not acting as a clock master Remedy Select clock source INTERNAL or disconnect the Sync cable Configure the external device to act as clock master If the Digirator reacts unexpectedly a reset to the factory set tings might solve the problem 1 Switch the instrument off 2 Hold down the esc button and simultaneously operate the On Off button You can reload the Wave Dolby and DTS files of t
34. w for selecting the termination impedance appears THPUT IMPEDAHCE Hi Z 750 Note also that there are different ways to route the indepen dent reference clock to the two devices If the reference clock source has multiple buffered outputs separate cables may be connected to the SYNC input of the DR2 and to that of the device under test in a star configuration But if a single ref erence clock output must drive both the DR2 and the device under test the first connected sync input would be placed in high impedance Hi Z mode and the second or last would be terminated 1 Choose the desired impedance with the rotary wheel and press Enter to confirm The following termination impedances are available 759 1100 Hi Z Video Word Clock AES3 DARS e You can define the most important settings in the channel sta tus data SYne INT Hi e HB OkH2 et FRO LINEAR FCH fo EHFH 2CHI 1 Choose the desired parameter 1 2 or 3 with the rotary wheel and press ENTER to change the value The settings are always applicable for both channels All non visible settings of the channel status information are automatically set by the DR2 Emphasis settings 3 do not have any influ ence on the signal generation Operation INTi AUDIO The output channels of the DR2 can be individually muted or inverted GEHERATOR fides C OHF IG A B Both output channels are active A Channel A
35. y wheel to set the parameter 4 Confirm the setting with the Enter button 20 Operation INTi AUDIO You can set up the sensitivity step size of the rotary wheel To do this proceed as follows GEHERATOR A E COHFIG 1 Select Level LUL or Frequency with the rotary wheel 2 Hold down the sens button un SINEHAVE LUL H BF g 1 666 kHz Y eS SEHSE IG Wa0lT VAR 3 Turn the rotary wheel to set up the desired sensitivity 4 Release the Sens button to accept the desired sensitiv ity 21 INTi AUDIO Operation You may choose to have the Digirator DR2 either generate the sampling clock internally or be synchronized to an external clock source see Synchronizing to an external clock With no signal applied to the SNYC input you may choose among the internally generated clock frequencies 1 Select from the available interna wheel and then press Enter values with the rotary Sune INT Hi Z FRO LINEAR FCH CCITT EH 2 Turn the wheel to alter the sampling frequency 3 Confirm your selection by pressing Enter For non linear PCM Signals Dolby DTS as well as in the TRANSPAR mode the sampling frequency is fixed to 48 kHz 22 The SYNC input of the DR2 is continuously monitored and scanned for useable clock references see Characteristics of the SYNC input In this mode the SYNC input is terminated with Hi Z As soon as a clock signal is detected a windo
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