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ATS-1_48k_datasheet

1. Audio precision Testing for Optimal Results ATS 1 Audio Precision Quality in a Low Cost Stand Alone Test Set Unmatched Value System replacement for obsolete equipment HP8903B emulation mode over HPIB GPIB Unparalleled Precision Low Distortion Analog System THD N 80 kHz BW 92 dB Digital Distortion THD N lt 140 dB High Analog Bandwidth Signal Generation to 120 kHz Low Noise 22 Hz 22 kHz lt 114 dBu A weighted lt 118 dBu Wide Input Voltage Range Input Range 80 mV 250 V in 10 dB steps Flat Response 20 Hz 20 kHz 0 05 dB Low Crosstalk Input lt 120 dB Output lt 110 dB Low Jitter Generator lt 0 8 ns Analyzer lt 1 6 ns ATS 1 Audio Precision Quality in a Stand Alone Package The ATS 1 family of audio test instruments at home on the bench or in a test rack under GPIB control With thousands of units sold you ll find the ATS 1 family of audio analyzers in operation around the world in maintenance engineering and production facilities Whether in broad cast communications bench or production use ATS 1 offers a complete easy to use audio test set ready for almost any environment With twelve different measurement functions selectable at the push of a button ATS 1 is comprehensive while remaining user friendly Its popularity is no less due to its outstanding performance specifications yet ATS 1 is as af fordable as lower performing test sets Analog
2. software development more productive ATS 1 provides full query back of all manual set tings and on line help to speed up code development Measurement sweep data is stored in the instrument for quick batch transfers without holding up GPIB bus traffic Settled GPIB Readings Reliable measurements are assured by algo rithms inside the instrument which automatically compensate for varying de vice settling speeds Settling can be disabled for measurements of jitter or other instantaneous values GPIB Software Drivers Audio Precision supports the ATS 1 with a National Instruments LabView and LabWindows CVI driver for C and Basic pro grammers The LabWindows driver runs with National Instruments GPIB interface cards for personal computers The driver speeds development of test routines by eliminating the need to learn the ATS 1 programming mnemonics HP8903B GPIB Emulation Mode GPIB ADDR CMD MODE FRE Q STEP 31 HFI E ISG IDLE ERRM PON Loc ESH CO h AMPL STEP HETE OO h 1ABE I O ATS 1 also emulates the HP8903B audio an alyzer HP command set for a simple replacement of slow and outdated equip ment in existing systems A front panel button selects between the Audio Precision 488 2 GPIB command mode and the HPIB command mode ANALOG SIGNAL OUTPUTS Low Distortion Sine Wave Frequency Range Frequency Accuracy Amplitude Range 10 Hz to 120 kHz 0 5 20 Hz to 30 kHz Balanced lt
3. Error flag displays for confidence lock cod ing parity errors and the validity bit are included Additional active bit and actual bit displays on the panel help determine the word length of the incoming signal and detect stuck bits Digital Dither ATS 1 Dual Domain includes a full comple ment of dither selections triangular and rectangular probability distribution func tions white or shaped spectrum Dither amplitude is automatically set to the proper value for the output word length and the selected probability function Sample amp Frame Sync Synchronize ATS 1 Dual Domain sample and frame sync to the digital reference house sync input Digital Pass Mode Sends the input digital audio content to the output while modifying status bytes validity bit etc ATS 1 Dual Domain can thus be used as a problem solver between incompatible equipment Signal Monitoring Outputs A digital signal appropriate for syncing an external oscilloscope may be derived from the input sample rate output sample rate input block rate output block rate digital audio waveform jitter signal or the de tected interface errors A buffered version of the balanced AES3 signal from the XLR input is also available which coupled with the high input impedance of the XLR in bridging mode allows non intrusive digital line measurements with conventional ground referenced oscilloscopes Versatile Connectivity Choose among three diffe
4. Only or full Dual Domain Analog and Digital The ATS 1 Access ATS 1 Access includes comprehensive analog generation and measurement with two outputs and two inputs Easy to set up sweep capability produces graphs of frequency response dis tortion vs frequency and even amplitude sweeps Non volatile storage of up to 30 tests allows easy one button recall of your favorite test setup Connect ATS 1 to a compatible printer and produce reports incorporating high resolution graphs If you work with digital audio the ATS 1 Dual Domain model adds AES3 SPDIF audio and interface measurement ca pabilities to the comprehensive analog capabilities of the ATS 1 family Analog Digital AES3 SPDIF the ATS 1 Dual Domain ATS 1 Dual Domain is a comprehensive audio test set for both analog and digital audio as well as for generation and measurement of AES3 SPDIF digital interface characteristics such as jitter Like our 2700 Series family of instruments ATS 1 Dual Domain features true dual domain architecture Digital signals are generated and measured purely in the digital do main resulting in the extremely low distortion and noise residuals necessary for making useful digital audio measurements Performance Measurement Power and Ease of Use Easy to Use Measurement functions are simply selected from the front panel Just press a button and make the FUNCTION s ANALOG measurement Se lection of analog and digital inputs is clearl
5. Performance Does the in strument have an analog hardware generator and an analog hardware an alyzer Some competitive units at twice the price of ATS 1 Dual Domain use DSP techniques for all generation and analysis so analog signals pass through converters inside the instru ment The result is THD N as high as 79 dB flatness as poor as 0 2 dB inadequate for most modern audio devices Interface Testing Does the instru ment have independent analog digi tal and jitter generators If it can only provide analog or digital output at any one time you can t test a house synchronized A D converter for jitter rejection Without independent flexible digital audio and jitter gener ators you can t measure jitter sensi tivity of a D A converter at various audio and jitter frequency combina tions True Dual Domain True Dual Domain hardware by definition guarantees a full range of analysis capabilities in both analog and digital domains Ev eryone measures level and some mea sure THD N although implemented with extremely limited performance as noted above Be sure that other useful measurements such as IMD Intermodulation Distortion Phase and Crosstalk are available for both analog and digital signals not just analog Audio Precisio n Testing for Optimal Results 5750 SW Arctic Drive Beaverton Oregon 97005 Tel 503 627 0832 Fax 503 641 8906 US Toll Free 1 800 231 7350 email sa
6. Q in 1 6 mV steps Narrow Band Amplitude Frequency Range 0 04 to 40 of sample rate 10 Hz 19 2 kHz at 48 0 ks sec 10 pole Q 19 BW 5 3 of f Filter Shape THD N Measurements Fundamental Range 0 02 to 45 of sample rate 10 Hz 22 0 kHz at 48 0 ks sec lt 138 dBFS 22 Hz 400 Hz 2 pole Butterworth 15 kHz 20 kHz 6 pole elliptic low pass ANSI IEC A weighting CCIR QPK CCIR RMS SMPTE DIN IMD Function with option ATS IMD Test Signal Compatibility 40 250 Hz and 3 kHz 20 kHz in 1 1 to 4 1 ratio Amplitude modulation products of the HF tone lt 0 0001 10 Residual THD N High pass Filters Low pass Filters Weighting Filters IMD Measured Measurement Range Accuracy 1 dB per SMPTE RP 120 1983 DIN 45403 Residual IMD 0 dBFS lt 0 0001 120 dB 60 7 kHz or 250 8 kHz Frequency Measurements ange 5 Hz to 47 of sample rate Phase Measurement Related Measurement Ranges 7A 180 90 270 or 90 270 deg Accuracy 2 0 deg 20 Hz 20 kHz Resolution 0 1 deg BITTEST Measurement Measurement Compatible with random mode of Audio Precision BITTEST DIGITAL INTERFACE MEASUREMENTS AES EBU Impairments Real Time Displays Input Sample Rate 0 002 20 PPM internal ref 0 0001 1 PPM external ref Measures status propagation on the AES EBU output to the in Range is 0 192 frames reso ie 60 ns Output to Input or Reference Input t
7. digital reference house sync input with the digital generator Then add jitter or vary the sample rate to see the ef Turn on ATS 1 Audio Testing to Meet Your Challenges JITTER XLE Low I J FREG I 0 484 u1 4 99 Upp 400 46 Hz fect on THD N IMD or noise Competitive units can drive only one domain at a time or use their analog generator to create the digital jitter and thus can t make this mea surement at all Separate Digital Inputs amp Outputs Three 1 0 formats XLR BNC and optical Toslink All are completely separate from the analog audio XLR connectors permit ting both digital and analog generators to operate simultaneously No cable changes required to go from A D to D A to D D to A A testing of a digital tape machine for example Digital amp Analog Monitors Listen to all measurements in the digital and analog do mains over the EEE internal loud a fa j i phones In the analog domain monitor speaker or a pair of head signals or distortion In the digital domain the incoming signal distortion or jitter can all be monitored Jitter Meter ATS 1 Dual Domain includes jitter measure ment in nanoseconds or in Unit Intervals Two filter selections are provided for the GEN SINE 1 0000 Fr 997 00 Hz UN HT HP 30 Hz RMS jitter meter a 700 Hz high pass filter used for residual jitter measurements according to AES standards and a 50 Hz high pass fil ter for jitter
8. is set to match the device under test to assure proper dither Input resolution must be set to ex clude signal in the AUX bits or other low level bit activity meaningless to the desired measurement IRATE BHC HiZ DELAY 48000 0 Hz 260 72 UI GEN SINE 60 00daBFr 1 0001 kHz REF MEAS INPi 24hbit OUT BLOCK Independent Input amp Output Sample Rates Lets you test sample rate converters Mea surement of the incoming embedded audio signal can be referred to the incoming sam ple rate status byte indication of rate or the outgoing generator rate DCS ENDS CONS EMPH NONE SRi32 kHz DINP CONS EMPH NONE SR 32kHz HO ERRORS VALID COPY Wo COPY NG Datav Error Testing Capability for Digital Audio Signals Stimulate the test device with random data and display current or totaled error mea surements on both channels The signal and DERROR GA ERROR GE DATA GE 1567587T 15672667 O U OOOO H 40000000T analysis techniques are compatible with the BITTEST feature of our System products so you can test a transmission link end to end with an ATS 1 Dual Domain at one end and a System Two Cascade or 2700 Series dual domain instrument at the other Other Digital Convenience Functions Digital Status bytes are displayed and set in high level English ERROR GAl ERROR GB DATA Gh 0 0 6FEA40hex 24 pe 6 HIT gM ACTIVEEBIT IERROR GA ERROR GE DATA G 0 0 SA0DG0hex 24 sees Oe See OCLUALEIE
9. rear connections at time of order ATS BNC BNC and banana jack connector panel ATS XLR XLR and banana jack connector panel ATS PHJ inch phone and banana jack connector panel ATS R Rear mount front mount connector panel is default Options and Accessories for ATS 1 Instruments ATS IMD SMPTE DIN intermodulation distortion measurement and generation analog and digital RAK ATS Rack mount shelf for ATS 1 Access or ATS 1 Dual Domain MAN ATSA Additional ATS 1 Access operator s manual one included with instrument MAN ATSDD Additional ATS 1 Dual Domain operator s manual one included with instrument MAN ATS488 Additional GPIB manual for ATS 1 Access or ATS 1 Dual Domain one included with instrument SVC ATS Service manual for ATS 1 Access or ATS 1 Dual Domain CAB XMF Set of four XLR male to XLR female cables CAB XBR Set of four XLR male female to RCA BNC cables CAB AES Set of two AES3 digital cables 1 meter CAB AES2 Set of two AES3 digital cables 2 meters CAB AES4 Set of two AES3 digital cables 4 meters ATS 1 includes a removable carrying handle Portable and self contained take your ATS 1 with you on the road pn 0057 0002 rev 0 gt a INTERMOD DEMODULATOR MICROPROCESSOR DSP SQUARE WAVE GENERATOR PRIMARY READING DETECTOR MAIN OSCILLATOR SECONDARY READING DETECTOR IMD HF TONE GENERATOR SUMMATION LCD DISPLAY BALANCING outpu
10. response measurements Other Interface Signal Measurements ATS 1 Dual Domain measures key digital 1 0 interface parameters in addition to jitter including sample rate AES signal voltage frame delay through the device under test and delay of the input signal relative to a house sync reference frame or block IRATE GISLE Loz G DELAY L 4800 0 He 2 98 Upp 24 30 ns GEN SINE 1 0000 Fs 1 0000 kHz HEF STAT INP 24hbit OUT BLOCK Flexible Interface Impairment Simulation Flexible digital interface testing is vital for troubleshooting and verifying performance of digital audio at the systems level ATS 1 Dual Domain allows simulation of real world transmission and interface problems JITTER GENERATOR DIITISINE 0 201 UI 1 002 kHz Vary the digital output signal to test the ac ceptance range of your digital devices Set Sample rate anywhere from 28 8 kHz to 52 8 kHz not just at the three standard frequencies Inject jitter amplitude from 0 UI to 2 5 UI 415 ns at 48 kHz in 0 01 UI 1 6 ns steps or 0 UI to 25 5 UI 4150 ns in 0 1 UI 16 ns steps Injected jitter frequency can be set from 10 Hz to 38 8 kHz not just to a fixed fre quency Adjust output signal amplitude continuously from zero to 5 12 Volts in 5 mV increments not just at a few steps Independent Interface 1 0 Word Lengths Word length resolution of digital input and output are independently set from 16 to 24 bits Output resolution
11. 0 25 mV to 26 25 Vrms 70 dBu to 30 6 dBu Unbalanced lt 0 25 mV to 13 12 Vrms 70 dBu to 24 6 dBu Amplitude Accuracy 0 2 dB 2 3 at 1 kHz Amplitude Resolution 0 01 dB Flatness 1 kHz ref 10 Hz 20 kHz 0 05 dB Residual THD N 25 Hz 20 kHz lt 0 0025 3 uV 80 kHz BW 92 dB Square Wave Frequency Range 20 Hz 30 kHz Amplitude Range Balanced 0 71 mVpp to 34 73 Vpp Unbalanced 0 71 mVpp to 17 36 Vpp Amplitude Accuracy 0 3 dB 43 5 at 400 Hz Rise fall time ically 2 5 3 0 us SMPTE or DIN Test Signals with option ATS IMD LF Tone 50 60 70 or 250 all 1 0 HF Tone Range 7 kHz or 8 kHz 1 Mix Ratio 4 1 LF HF Residual IMD 0 0015 96 5 dB 60 Hz 7 kHz or 250 Hz 8 kHz OUTPUT CHARACTERISTICS Source Configuration Source Impedances Selectable balanced or unbalanced Balanced 50 Q NE 263 150 Q 2 Q or 600 Q Unbalanced 50 Q a o Output Current Limit 75 mA peak Max Output Power Balanced Unbalanced Output Related Crosstalk 10 Hz 20 kHz ANALOG ANALYZER ANALOG INPUT CHARACTERISTICS Input Ranges 80 mV to 250 V in 10 dB steps Maximum Rated Input 350 Vpk 140 Vrms dc to 20 kHz overload protected 29 9 dBm into 600 Q Rs 50 Q 23 8 dBm into 600 Q Rs 50 Q lt 110 dB or 10 uV whichever is greater Input Impedance Balanced each side Unbalanced Terminations CMRR 80 mV 2 5 V range Input Related Crosstalk 10 Hz 20 kHz W
12. able 10 Hz to 1 6 sample rate f 4096 to f 6 in even integer divisors SMPTE DIN IMD Waveform with option ATS IMD Upper Tone Range Choice of 7 kHz or 8 kHz Lower Tone Range Choice of 50 Hz 60 Hz 70 Hz or 250 Hz Amplitude Ratio 4 1 LF HF Residual Distortion lt 0 00001 140 dB at 4 1 ratio Random Generator Waveform Waveform Compatible with Audio Precision BITTEST Dither all waveforms Probability Distribution Triangular or rectangular independent for eac channel Flat white or Shaped 6 dB oct triangular only Spectral Distribution Flatness 1 kHz ref Bandwidth Limiting Filters LF 3 dB HF 3 dB 0 05 dB 20 Hz 20 kHz lt 10 Hz 400 Hz 5 3 pole 22 kHz 30 kHz 80 kHz 3 pole or 300 kHz ANSI IEC A CCIR QPK CCIR ARM CCIR RMS Up to 2 Aux 1 and Aux 2 RMS 7 60 ms AVG QPK CCIR Rec 468 Weighting Filters Optional Filters Detection R Noise 22 Hz 22 2 kHz BW lt 1 A weighted lt 1 lt CCIR QPK Frequency Meter Related both channels Measurement Range 10 Hz 200 kHz Accuracy 0 01 100 PPM Resolution 5 digits Phase Measurement Related Measurement Ranges 180 90 270 or 90 270 deg Amplitude AES EBU INTERFACE GENERATION Interface Signal Amplitude Range Balanced XLR Unbalanced BNC Automatically tracks word length or off 0 5 11 Vpp into 110 Q in 5 mV steps 0 1 62 Vpp into 75
13. f 0 1 dB 100 pV Vin gt 10 mV 0 05 dB 20 Hz 20 kHz Bandpass Amplitude Function Tuning Range f Bandpass Response 20 Hz to 120 kHz Q 5 2 pole Lock Range 0 0025 25 PPM DIGITAL ANALYZER DIGITAL INPUT CHARACTERISTICS Input Formats AES EBU per AES3 1992 SPDIF ETAJ Optical Accuracy at f 0 3 dB 20 Hz 120 kHz THD N SINAD Function Fundamental Range Measurement Range SINAD Range 10 Hz to 100 kHz THD N mode 001 100 400 Hz 1 kHz Accuracy 1 dB 20 Hz 120 kHz harmonics Measurement Bandwidth LF 3 dB lt 10 or 400 HF 3 dB 22k 30k nals or 300 kHz Residual THD N 25 Hz 20 kHz 0 0025 3 0 pV 80 kHz BW 92 dB Crosstalk Function Frequency Range Measurement Range Accuracy 10 Hz to 120 kHz 140 dB to 0 dB 0 5 dB Sample Rates 28 8 kHz 52 8 kHz Word Length 16 to 24 bits EMBEDDED AUDIO MEASUREMENTS Wideband Level Amplitude Range 0 dBFS to 140 dBFS Frequency Range lt 10 Hz 22 0 kHz at 48 ks sec Accuracy 0 01 dB 90 dBFS Flatness 0 01 dB 15 Hz 22 kHz High pass Filters Low pass Filters 22 Hz 400 Hz 2 pole Butterworth 15 kHz 20 kHz 6 pole elliptic low pass Weighting Filters ANSI IEC A weighting CCIR QPK CCIR RMS Residual Noise 140 dBFS unweighted 142 dBFS A weighted Channel Status Bits English language decoded Professional Consumer Displayed for selected channel Disp
14. ideband Amplitude Noise Function Measurement Range lt 1 Vrms to 140 Vrms 118 dBu to 45 dBu 0 2 dB 2 37 unweighted Nominally 100 k amp 2 150 200 pF Nominally 100 kQ 150 200 pF Selectable 600 Q 1 70 dB 50 Hz 20 kHz lt 120 dB or 1 uV whichever is greater Accuracy 1 kHz SMPTE DIN IMD Function with option ATS IMD Test Signal Compatibility 40 250 Hz and 3 kHz 20 kHz in 0 1 to 8 1 ratio Amplitude modulation products of the HF tone lt 0 0025 20 IMD Measured Measurement Range Accuracy 1 dB per SMPTE RP 120 1983 DIN 45403 Residual IMD lt 0 0025 92 dB 60 7 kHz or 250 8 kHz Wow amp Flutter Function Test Signal Compatibility Accuracy 4 Hz Detection Modes 2 80 kHz 3 35 kHz 5 of reading 0 002 IEC DIN NAB JIS Residual W F lt 0 005 Weighted lt 0 01 Unweighted DIGITAL SIGNAL GENERATOR DIGITAL OUTPUT CHARACTERISTICS Output Formats AES EBU per AES3 1992 SPDIF ETAJ Optical 28 8 kHz 52 8 kHz 0 002 20 PPM lockable to external reference Sample Rates Sample Rate Accuracy Word Length 16 to 24 bits even values Sine Wave 10 Hz to 47 of sample rate 22 56 kHz at 48 ks s Sample Rate 2 typically 0 006 Hz at 48 ks sec Frequency Range Frequency Resolution Flatness 0 001 dB Residual Distortion 0 00001 140 dB Square Wave Frequency Range Frequencies avail
15. ies for both analog and digital audio signals Measure ments common to both domains include Amplitude Noise Level 2 channels simul taneously Frequency Phase THD N SMPTE DIN IMD Crosstalk and Level Ratio Standard A weighting CCIR 468 and LP HP filters are included in both domains RMS and quasi peak CCIR 468 detectors are available in both domains Analog Performance The low distortion transformer coupled ana log generator supplies a full 30 17 dBu 29 5 dBm into 600 2 at selectable 50 Q 150 Q or 600 Q source imped ances Extremely low analyzer noise and residual distortion support measurement of high performance digital devices Analog Convenience Functions In addition to the above measurements the analog GEN LOAD function measures the in put resistance of your device at any frequency you choose and makes swept im pedance measurements including loudspeakers AC MAINS CHECK measures the voltage fre quency and distortion of the power line without hazardous direct connections BARGRAPH display in AC MAINS CHECK func tion provides a visible history of maximum and minimum mains voltage excursions AAC MAINS THD N FREG 117 0 vV 48 59 982 Hz AGEN SINE 1 000 u 1 000 kHz SELF TEST The dBg unit dB referred to the present an alog generator amplitude is useful for compression threshold measurements or rapid response sweeps at several different absolute levels as well as for input to
16. layed for total signal both channels combined Validity Flag Parity Signal Confidence Receiver Lock Coding Error AUXILIARY SIGNALS Generator Analog Sync Output Digital Sync Output Analyzer Input Monitor Analyzer Reading AUDIO MONITOR Power Output Typically 1 watt GENERAL ENVIRONMENTAL Power Requirements es rae i 10 6 50 60 Hz 50 V 0 C to 50 C Operating 20 C to 60 C Storage Temperature Range Humidity 90 RH to at least 40 C non condensing EMC Complies with 89 336 EEC CISPR 22 class B and FCC 15 subpart J class B Dimensions 16 5 x 6 0 x 13 6 inches 41 9 x 15 2 x 34 5 cm Weight Approximately 20 lbs 9 1 kg Safety Complies with 73 23 EEC 93 68 EEC EN61010 and IEC 1010 including Amendments 1 and 2 ATS 1 Dual Domain Block Diagram WOW amp FLUTTER DISCRIMINATOR CHANNEL ee A J MEASUREMENT AMPLIFIER and ATTENUATOR INPUT BAND PASS TERMINATION O BAND REJECT FILTER ANALOG ee INPUT BRE ANE l Sa ik PHASE FREQ zy COMPARATORS p CHANNEL ey B J INPUT TERMINATION IEC60958 INPUT AES3 AES3 JITTER INPUT RECEIVER DETECTOR OPTICAL INPUT AES3 REFERENCE INPUT Ordering Information ATS 1A ATS 1 Access Audio Test System with GPIB interface ATS 1DD ATS 1 Dual Domain digital and analog Audio Test System with GPIB interface Select panel type and front or
17. les audioprecision com web audioprecision com XI0607170000
18. o Input Delay AES EBU Input Voltage Balanced 400 mV to 10 24 Vpp 10 50 mV Unbalanced 100 mV to 2 56 Vpp 10 30 mV T peak sine wave calibrated 0 10 UI 1 5 dB 100 Hz 22 kHz 50 Hz HP selection RMS detection 48 kHz sample rate Residual Jitter peak calibrated 3 analyzer only 700 Hz 30 kHz W lt 0 01 UI RMS lt 0 03 UI Peak Jitter Amplitude 500 Hz Jitter Flatness Channel Status Bits English language decoded Professional Consumer Spurious Jitter Products lt 0 002 UI 1 2 kHz or 0 dB below jitter signal Validity Flag Selectable set or cleared AES EBU Impairments Induced Jitter Jitter Freq Range Sine wave 10 Hz to 38 8 kHz Jitter Amplitude 0 1 28 UI pk in steps of 0 005 UI or better 1 3 12 75 UI in steps of 0 05 UI or better Residual Jitter total generator analyzer peak calibrated lt 0 005 UI is Hz 30 kHz BW RMS response lt 0 015 UI 700 Hz 30 kHz BW Peak response Accuracy 20 Hz 20 kHz 2 0 deg Resolution 0 1 deg Level Meter Related both channels Measurement Range 10 mV to 140 V for specified accuracy and flatness useable to lt 100 uV 38 dBu to 45 dBu Spurious Jitter Products Jitter amp Ref Delay Off lt 0 0005 UI Jitter On lt 30 dB below jitter signal REFERENCE INPUT CHARACTERISTICS Input Formats AES EBU per AES3 1992 Input Sample Rates 28 8 kHz 52 8 kHz Accuracy 1 kHz Flatness 1 kHz re
19. out put gain loss measurements 600 Q Analog Input Terminations are indi vidually switchable for each channel of the analog analyzer Comprehensive Analog and Digital Functions Digital Performance ATS 1 Dual Domain uses a true DSP imple mented analyzer for digital measurements which results in 130 dB residual THD N 0 01 dB flatness and 140 dBFS residual noise Other mixed signal test sets in the THD N GER LEYVEL GE AUTO T GB 131 4 dB 1 0001 kHz Same price range have no digital analyzer but use a D A converter and an analog ana lyzer These architectures bottom out at 70 dB to 84 dB residual THD N 12 14 bit effective performance and 0 1 dB flat ness With today s best A D converters measuring 108 to pE fine 112 dB THD N s their real perfor a mance is invisible to these mixed S19 A competitive instrument lacking a DSP analyzer produces false THD N nal analyzers readings red trace from a popu lar A D converter but both the buried under the 475 2 Dual Domain and the Audio Precision 2700 Series graph the analyzer s noise and true performance of the converter from 5 dB to 28 dB lower as distortion floor shown by the blue trace Separate amp Independent Analog amp Digital Generators Often necessary for dual domain testing You may for example drive the inputs of an A D converter with the low distortion ana log sine while simultaneously driving the converter s
20. rent analog con nector panels for your ATS 1 The connector panel can be mounted on the front of your instrument for convenience or on the rear of the instrument if you d prefer your ATS 1 hard wired in a rack All the panels come with extra dual banana and ground lugs The XLR panel allows for either balanced or un balanced measurements by using a simple dual banana to BNC or to RCA phono adapter Save amp Recall Tests Save 30 instrument set RECALL STORE ups including sweep re sults data time stamped from the internal clock calendar Use for repeatable easy bench and production test ing or when in the field for storing test SAVE CANCEL 13 ATHD H_ OC AMPL E TALE Data AFREQ PAGE 19 GRAPH RECALL data to be printed or analyzed later Each saved test includes all settings for the en tire instrument a default description or your own title for the test the date and time and the last test sweep result data Connectivity Test Results and GPIB or HPIB Automation Print Graphs And Test Results ATS 1 prints graphs panel setups and mea Sured data either to laser PCL compatible or inkjet printers Front panel keys select two sizes of graph output including cursor data tabular sweep data bargraphs and front panels for printing IEEE 488 2 GPIB Port An IEEE 488 2 GPIB interface port is in cluded on the ATS 1 The commands closely model the front panel interface to make
21. t TRANSFORMER SIGNAL AMPLIFIER ALEVEL E LEVEL A FREQ B 2 332 VY 1 096 VY 1 0003 kHz AGEN SINE 1 000 V 1 000 kHz Generator Waveform Trigger M sitar Signal U ee ee CE m Cc LOCK GENERATOR os JITTER i JITTER AES3 GENERATOR MODULATOR RANSMITTER CHANNEL SOURCE IMPEDANCE OUTPUT ANALOG ATTENUATOR OUTPUT CHANNEL J B ANALOG TRIGGER OUTPUT FUNCTION MONITOR INPUT MONITOR SPEAKER HEADPHONE MONITOR MONITOR D to A DIGITAL TRIGGER Input Clock OUTPUT IEC60958 OUTPUT DRIVER M N AES3 OUTPUT i OPTICAL DRIVER OUTPUT BUYING AN ATS 1 ANALYZER FOR ANALOG AND DIGITAL AUDIO What to look for when evaluating com petitive instruments Digital Architecture and Features Not all analyzers that accept a digital input signal are actually digital ana lyzers Does the instrument have a real DSP implemented digital do main analyzer or just a D A converter from the digital input connector to an analog hardware analyzer This latter approach in a competitive unit yields distortion performance in the 12 14 bit range 70 to 85 dB THD N for example There s just not that much 12 bit digital audio around to mea sure anymore ATS 1 Dual Domain s digital analyzer guarantees 130 dB residual distortion nearly 22 bit per formance far in excess of the 108 to 112 dB actual linearity of today s best A D converters Analog
22. y indi cated on the front panel with LED legends ATS 1 makes graphs of swept measure ments in real time on the high contrast back lit LCD display including both frequency and amplitude sweeps Hard copy high resolution graphs 20 00 AEU compact screen sized graphs or tabular data listings can be made from your ATS 1 to la ser or ink jet printers at the touch of a button Bargraphs can display measure ments ranging from AC mains power line distortion to digital interface error rate and nearly everything in between Sepa ALEVEL GA LEVEL GE FREQ G 4 356 V 4 366 V 999 69 Hz e a A 1 000 u AUTORANGE 10 000 rate buttons and knobs provide independent control of frequency and amplitude The buttons provide large and medium steps decade and 1 3 octave steps for frequency 10 dB and 1 dB for amplitude with knobs for finer resolution When not otherwise FREQUENCY E E Y venient human interface for used the setting knobs and buttons also provide a con scrolling display cursors AMPLITUDE and for entry of other set i J ma tings and data Stereo ATS 1 Dual Domain is a true two channel in strument Both analog and digital level functions measure both inputs simulta neously Phase and level ratio measurements are also available Full Range of Analog amp Digital Testing Facilities ATS 1 Dual Domain provides complete and parallel measurement capabilit

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