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Audio Precision ATS-2 Getting Started

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Getting Started with Your ATS-2

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Summary of Contents for Audio Precision ATS-2

  • Page 1 ATS-2 Getting Started with Your ATS-2...
  • Page 3 Get ting Started with ATS-2 An In tro duc tory Guide to ATS-2 APIB and GPIB Con fig u ra tions...
  • Page 4 Copyright Ó 2001–2011 Audio Precision, Inc. All rights reserved. Audio Precision PN 8211.0136 Revision 7 All content in this manual is owned by Audio Precision and is protected by United States and international copyright laws. Audio Precision allows its customers to make a limited number...

  • Page 5: Table Of Contents

    General Information ......1 ATS-2: An Overview......1 APIB .
  • Page 6 Hardware Overview......17 ATS-2 Front Panel ......17 ATS-2 Rear Panel.
  • Page 7 GPIB Connection ......63 ATS-2 GPIB Address and I/O Mode Switch ... 65 GPIB Status LEDs .
  • Page 8 GPIB Program Message Terminators ....67 Getting Started with ATS-2...

  • Page 9: Safety Information

    Do NOT sub sti tute parts or make any mod i fi ca tions with out the writ ten ap proval of Au dio Pre ci sion. Do ing so may cre ate safety hazards. This prod uct is for in door use—pol lu tion de gree 2. Getting Started with ATS-2...

  • Page 10: Safety Symbols

    Au dio Pre ci sion cau tions against us ing their prod ucts in a man ner not spec i fied by the man u fac turer. To do oth er wise may void any war ran ties, dam age equip ment, or pose a safety risk to personnel. Getting Started with ATS-2...

  • Page 11: Chapter 1 General Information

    Figure 1. The Audio Precision ATS-2 audio test and measurement system. ATS-2: An Overview The Au dio Pre ci sion ATS-2 is a pow er ful com puter-con trolled au dio test and mea sure ment sys tem con sist ing of two key components: §...

  • Page 12: Apib

    Chapter 1: General Information ATS-2 Capabilities APIB The ATS con trol soft ware on the PC com mu ni cates with the ATS-2 hard ware in one of two ways: § USB-APIB Introduced with the release of ATS version 1.6, the USB-APIB adapter provides a convenient USB interface to the instrument.

  • Page 13: Conceptual Architecture Of Ats-2

    Conceptual Architecture of ATS-2 The func tional com po nents im ple mented in ATS-2 in clude two au dio sig nal gen er a tors, an au dio sig nal an a lyzer, dig i tal and an a log in put and out put mod ules, and a mod ule for ex ter nal timebase synchronization.

  • Page 14: About This Manual

    Web site at ap.com. ATS-2 User’s Manual The ATS-2 User’s Man ual is the pri mary op er a tion and ref er ence man - ual for the sys tem. Con sult the ATS-2 User’s Man ual for: §...

  • Page 15: Ap Basic User's Guide And Language Reference

    AP Basic Extensions Reference for ATS-2 The AP Ba sic Ex ten sions Ref er ence for ATS-2, avail able as a PDF on the Au dio Pre ci sion Re sources disc, con tains a list of OLE/ActiveX au to ma - tion com mands that con trol the spe cific fea tures of the ATS-2 hard ware and the ATS software.
  • Page 16 Chapter 1: General Information Other Documentation for ATS-2 Getting Started with ATS-2...

  • Page 17: Installation And Setup For Apib

    Installation and Setup for APIB ATS-2 Components The fol low ing items are in cluded with a stan dard, APIB-con fig ured ATS-2. For a GPIB-con fig ured ATS-2, re fer to Chap ter 7. § The ATS-2 hardware chassis.

  • Page 18: Installing Ats Software On A Pc

    Installing ATS Software on a PC PC System Requirements Your ATS-2 in stru ment must be con nected to a Win dows-ca pa ble PC to op er ate. The cur rent con trol soft ware is ATS ver sion 1.60, SP1 (Ser vice Pack 1).

  • Page 19: Installing The Software

    Chapter 2: Installation and Setup for APIB You will also need sig nal in ter face ca bles to con nect your ATS-2 in stru - ment to your de vice un der test (DUT). Since there are many pos si ble con - nec tion con fig u ra tions, sig nal ca bles are not pro vided with the in stru ment.

  • Page 20: Checking The Mains Supply Voltage Configuration

    Follow the instructions below to check or change the ATS-2 mains supply voltage selection. The mains power sup ply is ap plied to ATS-2 through the power en try mod ule lo cated on the rear panel. Be fore con nect ing the power cord, con - firm that the in put volt age se lec tion and fus ing ar range ment in the power en try mod ule are cor rect for your mains power supply.

  • Page 21: Changing The Mains Supply Voltage Configuration

    Setting Up the ATS-2 Hardware Chapter 2: Installation and Setup for APIB § Remove the mains power supply cord from the power cord connector. § Locate the slot in the module cover door hinge. The hinge is a the left side of the cover door, and the slot in the hinge is visible in the power cord connector cavity.

  • Page 22: Fuse Information

    Chapter 2: Installation and Setup for APIB Setting Up the ATS-2 Hardware point UP , opposite the indicated voltage. Seat the pin assembly in the notch on the board edge. § Insert the voltage selector card into the housing with the printed side of the card facing toward the mains power connector.

  • Page 23: Connecting Ats-2 To Your Pc

    Connecting ATS-2 to Your PC The ATS con trol soft ware com mu ni cates with the ATS-2 in stru ment through the Au dio Pre ci sion In ter face Bus (APIB). You will have re ceived one of the fol low ing in ter face adapter op tions with your in stru ment, as or - dered.

  • Page 24: The Apib Pci Express Card And Cable

    Chapter 2: Installation and Setup for APIB Connecting ATS-2 to Your PC The APIB PCI Express card and cable Turn off your PC and mount the PCI Ex press card in an open PCI Ex - press slot. Con nect the PCI Ex press card to the in stru ment us ing an APIB ca ble.

  • Page 25: The Apib Pcmcia Card And Cable

    Connecting ATS-2 to Your PC Chapter 2: Installation and Setup for APIB The APIB PCMCIA card and cable Con nect the small con nec tor on the PCMCIA APIB ca ble to the match - ing con nec tor on the PCMCIA card. Turn off your lap top and slide the card into an open PC card slot.
  • Page 26 Chapter 2: Installation and Setup for APIB Connecting ATS-2 to Your PC Getting Started with ATS-2...

  • Page 27: Chapter 3 Hardware Overview

    Chap ter 7 for more in for ma tion about the ATS-2 GPIB configuration. All sig nal gen er a tion and anal y sis is per formed in the ATS-2 hard ware, in clud ing stor age of sig nals ac quired for DSP wave form dis play or FFT analysis.

  • Page 28: Ats-2 Rear Panel

    ATS-2 in puts and out puts and the pan els as so ci ated with them. ATS-2 Rear Panel The ATS-2 in ter face, mon i tor, head phone, trig ger, sync, and util ity con - nec tions are mounted on the rear panel.
  • Page 29 § SERIAL NUMBER/OPTIONS LABEL—The Audio Precision serial number for this ATS-2 chassis, and the hardware options (if any) included in the chassis. § MONITOR JACK—This is a 3.5 mm jack suitable for driving stereo headphones or other audio monitors.
  • Page 30 Chapter 3: Hardware Overview ATS-2 Rear Panel Getting Started with ATS-2...

  • Page 31: Chapter 4 Ats-2 User Interface

    ATS-2 User Interface Overview ATS-2 is con trolled by the ATS soft ware run ning on the con trol ler PC via the Au dio Pre ci sion In ter face Bus (APIB). The hard ware is con fig ured through set tings in fields on soft ware pan els, and read ings (mea sure ments) are taken from me ters on other pan els.

  • Page 32: Starting Up The Ats Software

    PC. Click on this icon to start the soft ware. If you have an ATS-2 in stru ment con nected and switched on, the soft ware will au to mat i - cally de tect the hard ware and ini tial ize it. If you do not have hard ware con nected, or it is not switched on, the soft ware will prompt you to start demo mode.

  • Page 33: Ats Panels

    ATS Panels In ter ac tion with ATS-2 is per formed through con trol and mea sure ment win dows called pan els. These du pli cate the func tion of phys i cal con trol pan els found on con ven tional test and mea sure ment equip ment.

  • Page 34: Panel Settings

    Bar-Graph panels and the Volume Bar. Sliders can be operated by the mouse pointer or the arrow keys. Panel Readings Re sults of tests or mea sure ments are called read ings, which ATS-2 can dis play in sev eral ways: §...

  • Page 35: Ats Menus

    The Sweep menu con trols op er a tion of the sweep. The sweep is the fun - da men tal method used to col lect mea sure ments in ATS. For more in for ma - tion, see Chap ter 5 of this man ual, and Chap ter 15 of the ATS-2 User’s Man ual.

  • Page 36: Compute Menu

    AP Ba sic mac ros. AP Ba sic is the pro gram ming lan guage sup plied with ATS, and mac ros can be writ ten to con trol all as pects of ATS-2 func - tion al ity. See Chap ter 23 of the ATS-2 User’s Man ual for details.

  • Page 37: Toolbars And Buttons

    The Macro toolbar of fers op er a tions for run ning and ed it ing an AP Ba - sic Macro. See Chap ter 23 of the ATS-2 User’s Man ual for ex pla na tions of Macro toolbar but ton functions.

  • Page 38: Learn Mode Toolbar

    Learn Mode logs your ATS op er a tions as you per form them, build ing a macro for au to ma tion pur poses. See Chap ter 23 of the ATS-2 User’s Man ual for more in for ma tion on Learn Mode.

  • Page 39: Macro Files

    You can open pre vi ously saved tests and use them as they are, or you can mod ify and re-save the tests un der the same name or a new name. Sam ple tests are in cluded with ATS-2, and you can use them as start ing points for your own cus tom tests.

  • Page 40: Waveform Files

    For cer tain func tions, in clud ing FFT dis plays and some types of in ter - face anal y sis, ATS-2 ac quires a sam ple of the in put wave form. These sam - ples can be saved as wave form files and later opened by ATS for further use.

  • Page 41: Chapter 5 Quick Guides

    The Quick Guides in this chap ter pro vide a way to get used to the ATS user in ter face, and to get some im me di ate re sults from ATS-2. As you be - come more fa mil iar with the sys tem, please re fer to the ATS-2 User’s Man - ual for fur ther in for ma tion.

  • Page 42: Analyzer Panel

    The but ton will turn green, and you will hear re lays click in the ATS-2 hard ware. The peak me ters in the an a log in put panel will show ap - prox i mately 1.414 Vpp. The peak me ters in di cate the pres ence of signal at the analog inputs.

  • Page 43: Signal Monitor

    Signal Monitor ATS-2 has an in ter nal mono speaker to mon i tor both an a log and dig i tal in put sig nals. In ad di tion, the sig nal at the speaker is avail able (also in mono) at the head phone jack on the back of the in stru ment.

  • Page 44: Units

    As an ex am ple, if the am pli tude is set to 1 Vrms, the drop-down list in - cludes con ver sions such as 1.414 Vp and 2.220 dBu. If you click on the line dis play ing the am pli tude in Vp, the set ting changes to 1.414 Vp. The Getting Started with ATS-2...

  • Page 45: Quick Guide To Sweeps

    A of the ATS-2 User’s Man ual for more in for ma tion. Quick Guide to Sweeps Most de vice test ing with ATS-2 is per formed with sweeps. In a sweep, a set ting is stepped over a pre-de fined range, while se lected read ings are gath ered.

  • Page 46: Sweep Fundamentals

    This is shown in the Data 1 field as ‘An a lyzer.Level A’. The Ste reo Sweep checkbox near the bot tom of the Sweep panel au - to mat i cally en sures that read ings from both chan nels are gath ered dur ing Getting Started with ATS-2...

  • Page 47: Source Range, Steps, And Spacing

    If you change the units of the Top or Bot tom field, the units in the other field will also change. See the Units sec tion on page 34 for more in - for ma tion on units. Getting Started with ATS-2...

  • Page 48: Example Sweep: Frequency Response

    For this ex am ple, we will mea sure the fre quency re sponse flat ness of the ATS-2 it self. We con nect the an a log out put to the an a log in put, sweep the fre quency of the an a log gen er a tor over the au dio range, and plot the level mea sured by the an a lyzer against frequency.

  • Page 49: Example Sweep: Amplitude Linearity

    Example Sweep: Amplitude Linearity For this ex am ple, we will mea sure the am pli tude lin ear ity of the ATS-2. With the an a log out put con nected to the an a log in put, we sweep the am - pli tude of the an a log gen er a tor over its full range, and plot the ra tio of the level mea sured by the an a lyzer to the gen er a tor out put level, in dB.

  • Page 50: Quick Guide To The Fft Spectrum Analyzer

    This is in di cated as ‘DSP Trans form ing Data’ on the Sta tus bar. Once pro cess ing is com plete, ATS fetches a batch of read ings from the spec trum an a lyzer. At that point, the data is graphed. Getting Started with ATS-2...

  • Page 51: The Fft Concept

    For more in for ma tion, see Ap pen dix C of the ATS-2 User’s Man ual. Setting up an FFT Af ter a New Test, ATS de faults to the au dio an a lyzer.

  • Page 52: Panel Fields

    Be low the peak me ters is an ar ray of fields for con fig ur ing the an a lyzer. Here, we will use the de fault set tings. For more de tails on the set tings, see Chap ter 11 of the ATS-2 User’s Man ual. Time vs. Frequency As men tioned, the FFT spec trum an a lyzer can dis play au dio sig nals in the time do main and the fre quency do main.

  • Page 53: Fine-Tuning The Display

    1 kHz in ter vals above the fun da men tal. These are har - monic dis tor tion com po nents gen er ated in the ATS-2 hard ware. These har mon ics rise out of a wideband sys tem noise floor.

  • Page 54: Saving And Loading Tests

    FFT spec trum an a lyzer. ATS has other in stru ments to mea sure au - dio sig nals in dif fer ent ways. The ATS-2 User’s Man ual de scribes all the in - stru ments in detail.

  • Page 55: Chapter 6 Specifications

    Burst On Time 1 to number of interval cycles minus 1 Significant alias products may appear for frequency settings above 53.5 kHz. System specification including contributions from both generator and analyzer, 20 kHz NP0020.0002.003 measurement bandwidth. Getting Started with ATS-2...
  • Page 56 Analog Signal Generator Outputs Analog Output Characteristics Source Configurations Balanced (XLR), Unbalanced (XLR and BNC), or Common Mode Test (XLR) System specification with 60 Hz/7 kHz or 250 Hz/8 kHz test signal combinations and Vin ³ 200 mV. Getting Started with ATS-2...
  • Page 57 Burst signal envelope is rectangular, Shaped Burst envelope is raised cosine. Burst Interval 2 to 65536 cycles (max number of cycles may be limited at low frequencies) Burst On Time 1 to number of interval cycles minus 1 Getting Started with ATS-2...
  • Page 58 Maximum Number of Tones (Length / 2) minus 1 [8191 with Length = 16384] Dither Applies to all waveform except Monotonicity, J-Test, Walking Ones, Walking Zeros, Random Types None, Triangular, Rectangular, or Shaped Amplitude 8 to 24 bit Getting Started with ATS-2...
  • Page 59 20 Hz to 200 kHz, <0.1 Hz resolution Amplitude Range 0.05 to 0.1275 UI in 0.0005 UI steps 0.130 to 1.275 UI in 0.005 UI steps 1.30 to 12.75 UI in 0.05 UI steps Accuracy (500 Hz) ±(10% + 2 ns) Getting Started with ATS-2...
  • Page 60 ³ 1.0 Vpp (XLR) or ³ 250 mVpp (BNC); and (3) the analyzer is set for 700 Hz–100 kHz bandwidth. 1 kHz ref. Flatness derates above 5 kHz by an additional ±0.02 dB in the 22.4 V, 45 V, 90 V, and 200 V input ranges. Getting Started with ATS-2...
  • Page 61 15 kHz (6-pole elliptic, 0.1 dB ripple, 110 dB stopband) User defined (6-pole max) Both analyzer input channels must have same coupling (ac or dc) selection. Analog accuracy is valid for any input signal amplitude ratio up to ±30 dB. Getting Started with ATS-2...
  • Page 62 Acquisition Length 800 to 256 k samples in 11 steps Transform Length 256 to 32768 samples in binary steps System specification with 60 Hz/7 kHz or 250 Hz/8 kHz test signal combinations and Vin ³ 200 mV. Getting Started with ATS-2...
  • Page 63 SR / Length [2.0 Hz with SR = 65.536 kS/s and Length = 32768] Both analyzer input channels must have same coupling (ac or dc) selection. Analog accuracy is valid for any input signal amplitude ratio up to ±30 dB. Getting Started with ATS-2...
  • Page 64 ±0.0001% [±1 PPM] Input Voltage Balanced (XLR) 200 mV to 5.10 Vpp, ±(10% + 50 mV) Unbalanced (BNC) 100 mV to 1.275 Vpp, ±(10% + 12 mV) CMRR performance below 50 Hz degrades substantially with AC coupling. Getting Started with ATS-2...
  • Page 65 System specification valid only if (1) the jitter generator amplitude is turned off; (2) the digital input is ³ 1.0 Vpp (XLR) or ³ 250 mVpp (BNC); and (3) the analyzer is set for 700 Hz–100 kHz bandwidth. Getting Started with ATS-2...
  • Page 66 Channel B Sync/Ref Receive Sub-Frame Sync/Ref Receive Block Sync/Ref Receive Error General/Environmental Power Requirements 100/120/230/240 Vac (–10% +6%), 50–60 Hz, 75 VA max Temperature Range Operating +5°C to +45°C Storage –40°C to +75°C Humidity 90% RH to +40°C (non-condensing) Getting Started with ATS-2...
  • Page 67 UL Std No 3111-1, Equipment for Measurement Use; Part I: General Requirements Emission and immunity levels are influenced by the shielding performance of the connecting cables. EMC compliance was demonstrated using Audio Precision part numbers CAB-XMF and CAB-AES2. Getting Started with ATS-2...
  • Page 68 Chapter 6: Specifications Getting Started with ATS-2...

  • Page 69: Gpib Configuration

    APIB or GPIB? ATS-2 is nor mally con trolled by Au dio Pre ci sion’s ATS mea sure ment soft ware us ing the APIB in ter face bus. In the GPIB con fig u ra tion, ATS-2 Getting Started with ATS-2...

  • Page 70: The Gpib Software Development Process

    Au dio Pre ci sion does not pro vide con trol soft ware for GPIB ap pli ca - tions. We do of fer full doc u men ta tion of the ATS-2 func tions con trol la ble by GPIB in the ATS-2 GPIB Pro gram mer’s Ref er ence Man ual, which con - tains a list ing of all ATS-2 GPIB com mands and de tailed ex pla na tions of com mand pa ram e ters.
  • Page 71 Ref er ence Man ual for the equiv a lent GPIB com mands. It con tains de tailed in for ma tion on ev ery GPIB com mand for ATS-2, along with gen eral pro - gram ming in for ma tion, code ex am ples and ref er ence ma te rial. It is avail - able sep a rately from Au dio Pre ci sion.

  • Page 72: Using Both Gpib And Apib For Software Development

    - trol ATS-2 and to as sign the in stru ment’s GPIB ad dress. Dur ing the soft - ware de vel op ment pro cess you may switch be tween the two modes in or der to take ad van tage of the in ter ac tive de vel op ment en vi ron ment of the ATS measurement software.

  • Page 73: Establishing Gpib Communication

    DCX-127 and the SWR-2122 fam ily of switch ers. Fig ure 27 il lus trates how to con nect these de vices to the ATS-2 when the GPIB port is the con trol port; Fig ure 28 il lus trates how to con nect an APIB con trol ler to this sys tem when the GPIB port is disabled.
  • Page 74 Chapter 7: GPIB Configuration The GPIB Software Development Process Figure 27. APIB connections to ATS-2 with GPIB option in GPIB control mode. SWR-2122 Switcher and DCX-127 connected to the APIB connector of the ATS-2. The computer APIB cable is not connected.

  • Page 75: Ats-2 Gpib Address And I/O Mode Switch

    ATS-2 GPIB Address and I/O Mode Switch Like all in stru ments on the bus, ATS-2 must be set to a unique GPIB ad - dress. An ad dress se lect switch bank with six slide switches sets the GPIB ad - dress and the I/O Mode.
  • Page 76 Set the switch to 1 (up) to set the con trol mode to APIB. The APIB mode dis ables the GPIB in ter face (the pins are all set to the high-im ped - ance state) and en ables APIB to con trol the ATS-2. Getting Started with ATS-2...

  • Page 77: Gpib Status Leds

    GPIB ADDRESS RL1, PP0, DC1, DT1, C0, E2 Figure 30. ATS-2 GPIB Option panel: Address Switch, Status LEDs and GPIB port. GPIB Status LEDs The six GPIB Sta tus LEDs shown in Fig ure 30 in di cate the cur rent sta tus of the GPIB bus.
  • Page 78 The NL character alone without EOI is not supported. When the in stru ment is ad dressed as a talker, one PMT is sup ported: § EOI line asserted with the NL character (ASCII 10, the linefeed character). Getting Started with ATS-2...

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