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Audio Precision Portable One Dual Domain User Manual

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Summary of Contents for Audio Precision Portable One Dual Domain

  • Page 1 ® Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832)
  • Page 2 Portable One Dual Domain User’s Manual Version 1.2 January 23, 1998...
  • Page 3 Audio Precision Portable One Dual Domain User’s Manual Version 1.2, January 1998 Copyright © 1998 Audio Precision, Inc. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in writing from the publisher.
  • Page 4 The fifth chapter is about applying the Portable One Dual Domain to specific real-world situations. If you are involved in any of the situations listed in this chapter, you may find some useful hints.
  • Page 5 PROTECTIVE EARTH TERMINAL - This symbol marks a terminal that is bonded to conductive parts of the instrument. Confirm that this terminal is connected to an external protective earthing system. Pg ii Portable One Dual Domain User's Manual...

  • Page 6: Table Of Contents

    Contents Contents Introducing the Portable One Dual Domain ....Getting Started .......
  • Page 7 Status Bits ........4-76 Pg iv Portable One Dual Domain User's Manual...
  • Page 8 Unbalanced Stereo Connections ..... . . 6-13 Appendix A - Units Quick Reference ....Portable One Dual Domain User's Manual Pg v...
  • Page 9 ........14-1 Pg vi Portable One Dual Domain User's Manual...

  • Page 10: Introducing The Portable One Dual Domain

    Introducing the Portable One Dual Domain Figure 1-1 Portable One Dual Domain The Audio Precision Portable One Dual Domain is a comprehensive two-channel audio test instrument. It is capable of analog, digital, and cross-domain (analog-to-digital or digital-to-analog) measurements. It features the following measurement functions:...
  • Page 11 Sample rate, amplitude, and delay of digital carrier signal Status Bits The Portable One Dual Domain can sweep most of these measurements across a user-specified frequency or amplitude range and display a graph of the results. The graph top and bottom values may be set by the user, even after a sweep, with the data dynamically re-scaling.
  • Page 12 Introducing the Portable One Dual Domain Measurements may be displayed in a wide variety of units, including the following: volts dBm (with a user-specified impedance reference) dBr (dB relative to a stored measured value) dBg (dB relative to the present generator output amplitude)
  • Page 13 Access and the ATS-1. All of the Portable units feature similar analog capabilities and the same easy-to-use interface in a convenient, portable package. The Portable One Dual Domain can be purchased with or without the ‘P1-IMD’ option, which allows generation and analysis of Intermodulation Distortion in both digital and analog domains.
  • Page 14 Introducing the Portable One Dual Domain Portable One Dual Domain User's Manual Pg 1-5...

  • Page 15: Getting Started

    . Cover Release Buttons Figure 2-1 Cover Release Buttons Notice that on the inside of the cover are simplified operation instructions for use as a quick reminder of common feature usage. Portable One Dual Domain User's Manual Pg 2-1...
  • Page 16 Normally it will be latched into its storage position. To use it, pivot it out toward the front panel and rest the instrument on it, as shown in the following figure: Tilt Bail Figure 2-2 Tilt Bail Pg 2-2 Portable One Dual Domain User's Manual...

  • Page 17: Connecting Mains Supply Voltage

    Once the line voltage selection is correct, connect the line cord from the power outlet to the power cord connector and move the power switch to the ‘On’ position (marked ‘1’). Portable One Dual Domain User's Manual Pg 2-3...

  • Page 18: Safety Information

    INSTALLATION CATEGORY II, abbreviated “CAT II” on the instrument front panel. Do NOT substitute parts or make any modifications without the written approval of Audio Precision. Doing so may create safety hazards. This product contains lithium batteries. Dispose only in accordance with applicable regulations.
  • Page 19 PROTECTIVE EARTH TERMINAL - This symbol marks a terminal that is bonded to conductive parts of the instrument. Confirm that this terminal is connected to an external protective earthing system. Portable One Dual Domain User's Manual Pg 2-5...

  • Page 20: Front Panel Overview

    4-26. the center key in the INPUT CONTROL KEYS group. Small colored dots indicate which measurements are available in which domain. The legend to these dots is shown at the top of Pg 2-6 Portable One Dual Domain User's Manual...
  • Page 21 ANALOG OUTPUTS - These XLR jacks provide analog signal Analog inputs output to the device-under-test. and outputs - ANALOG INPUTS - These XLR jacks provide analog signal page 3-3. inputs to the analyzer from the device-under-test. Portable One Dual Domain User's Manual Pg 2-7...

  • Page 22: Rear Panel Overview

    HOLES Figure 2-5 Rear Panel Overview SERIAL NUMBER LABEL - This label shows the serial number of the Portable One Dual Domain MONITOR OUTPUTS - These connectors provide monitor Monitor Outputs - page 3-11. outputs of the signal at the INPUT and after processing for the READING.
  • Page 23 POWER CORD CONNECTOR - This connects to a line cord to Connecting provide power input. Power - page 2-3. POWER SWITCH - This switch turns the main power supply to the Portable One Dual Domain on (1) and off (0). Portable One Dual Domain User's Manual Pg 2-9...

  • Page 24: Options Label

    Getting Started Options Label Options Label The Options Label specifies any options that are installed in your Portable One Dual Domain. It is located in the bottom right corner of the rear panel. PORTABLE ONE DUAL DOMAIN Audio Measurement System...

  • Page 25: Typical Connections

    Code 4,614,914; 4,563,652; 4,631,522; 5,089,981; 5,136,267; 5,265,201; 5,247,458; 5,420,516; 5,336,989. Other patent applications pending. PARALLEL PRINTER Manufactured in Beaverton, Oregon, USA REAR PANEL Figure 2-7 Typical Connections to Analog and Digital Device Portable One Dual Domain User's Manual Pg 2-11...
  • Page 26 Getting Started Typical Connections Pg 2-12 Portable One Dual Domain User's Manual...
  • Page 27 Typical Connections Getting Started Portable One Dual Domain User's Manual Pg 2-13...

  • Page 28: External Connections

    Therefore, it is most useful to test any device inputs or outputs directly in their own domain. This is why the Portable One Dual Domain has both digital and analog inputs and outputs. One fundamental difference between analog and digital domains is that a pair of wires (one signal and one ground) can carry only one channel in the analog domain.

  • Page 29: Balanced Vs. Unbalanced

    The most common balanced connector is the XLR connector. XLR connections are almost always balanced, although sometimes the XLR connector can be used in balanced or unbalanced configurations, as in the Portable One Dual Domain. Pg 3-2 Portable One Dual Domain User's Manual...

  • Page 30: Analog Inputs And Outputs

    Electrical connections between a device-under-test and the test instrument are typically made with test cables. Analog test cables for the Portable One Dual Domain should have XLR connectors on one end for connection to the test instrument. The other end of the cables For more detail must have a connector appropriate for the device-under-test.
  • Page 31 In most cases, you will want to use HiZ terminations. The main exception is when you are working with equipment that requires 600 Ω terminations. Check your device’s output specifications to see if a termination of 600 Ω is required. Pg 3-4 Portable One Dual Domain User's Manual...
  • Page 32 The 150 Ω and 600 Ω selections are generally only used with devices that have an equivalent input impedance. Check the input specifications for your device. For devices with higher input impedances, choose 40 Ω. Portable One Dual Domain User's Manual Pg 3-5...

  • Page 33: Digital Inputs And Outputs

    Digital devices typically use XLR connectors (using the AES/EBU standard) for balanced connections and BNC (using the SPDIF standard) for unbalanced connections. An optical link can also be used. The Portable One Dual Domain’s rear panel includes connectors for XLR, BNC, and optical input and output connections. DIGITAL...
  • Page 34 Never drive the XLR and BNC inputs simultaneously. Since the BNC becomes an output when the XLR is used, driving both inputs may damage the Portable One Dual Domain or the device-under-test. The digital generator sends signals to all the digital output connectors simultaneously.

  • Page 35: Reference Input

    The most common case for using the HiZ option is when the Portable One Dual Domain digital input is connected in parallel with another device, and the other device provides proper termination.

  • Page 36: Trigger Outputs

    DIGITAL I/O measurement function. See page 4-70. Trigger Outputs There are two trigger outputs provided on the rear panel of the Portable One Dual Domain. One is marked ANALOG, the other DIGITAL. TRIGGER OUTPUTS 5Vpp MAX...
  • Page 37 The trigger output will go through a complete cycle every transmitted frame. XMT CLOCK - The trigger signal will be a square wave with a period of 1/2 UI synchronized to the signal on the digital generator output. Pg 3-10 Portable One Dual Domain User's Manual...

  • Page 38: Monitor Outputs

    Monitor Outputs External Connections Monitor Outputs There are two monitor outputs provided on the rear panel of the Portable One Dual Domain. These monitors function in both digital and analog analyzer modes. MONITOR OUTPUTS 5Vpp MAX 5Vpp MAX PORTABLE ONE...

  • Page 39: Printer Port

    Printer Port Printer Port The Portable One Dual Domain is equipped with a parallel printer port for connection to a printer. The printer can then be used to print hi-resolution graphs or numerical data from a sweep, and any screen data may be captured and printed.

  • Page 40: Gpib Interface

    GPIB Interface External Connections GPIB Interface The Portable One Dual Domain can be purchased with the P1P-488 option, which provides a GPIB interface (also called IEEE-488) for connection to a host computer. The host computer can then control the instrument for a variety of automated applications.
  • Page 41 External Connections GPIB Interface NOTES: Pg 3-14 Portable One Dual Domain User's Manual...
  • Page 42 GPIB Interface External Connections Portable One Dual Domain User's Manual Pg 3-15...

  • Page 43: Operation

    INSTRUMENT MODE Keys – Navigating the Panels The INSTRUMENT MODE keys select major instrument operational and display modes. The display can show any one of eight different panels, selectable by these keys. Portable One Dual Domain User's Manual Pg 4-1...
  • Page 44 GPIB PANEL (IF P1P-488 OPTION INSTALLED) Shortcut: Pressing any FUNCTION STATUS BITS PANEL button will take you to the Main Panel, even if the measurement function does not change. Figure 4-2 Navigating the Panels Pg 4-2 Portable One Dual Domain User's Manual...
  • Page 45 The generator and soft key areas have been replaced with a horizontal bargraph. This bargraph shows a real-time analog-like display of a selected reading. See page 4-79 for more discussion of the Bargraph panel. Portable One Dual Domain User's Manual Pg 4-3...
  • Page 46 The type of printout will depend on which panel is currently displayed. For more information on printing and the Print panel, see page 4-85. Pg 4-4 Portable One Dual Domain User's Manual...

  • Page 47: Recall/Save Key

    FUNCTION key also depends on whether the Analyzer is in analog or digital mode. The FUNCTION keys and measurement functions are discussed in detail in the section on controlling the Analyzer. See page 4-21. Portable One Dual Domain User's Manual Pg 4-5...

  • Page 48: Input Keys

    The knob controls the frequency with resolution of 0.04%. One full rotation will change the frequency by about 15%. This may be different for other parameters. Pg 4-6 Portable One Dual Domain User's Manual...

  • Page 49: Amplitude Controls

    AMPLITUDE parameter. The knob controls amplitude with resolution of 0.0065 dB. One full rotation will change the amplitude by about 36% or 2.7 dB. This may be different for other parameters besides amplitude. Portable One Dual Domain User's Manual Pg 4-7...

  • Page 50: Dbr Zero Key

    Units, page 4-93. MONITOR Operation The Portable One Dual Domain has a built-in monitor for audible monitoring of signals, either with stereo headphones or through a built-in speaker. To use stereo headphones, plug them into the MONITOR jack. To use monophonic headphones, a special stereo-to-mono headphone adapter must be used.
  • Page 51 INC and FREQUENCY and AMPLITUDE INC and DEC keys. DEC controls, see pages 4-6 through 4-7. Portable One Dual Domain User's Manual Pg 4-9...

  • Page 52: Screen Saver

    For situations where the two hour time period is insufficient, the Portable One Dual Domain has an eight hour screen saver mode. This mode is entered by pressing the BARGRAPH key and RECALL/SAVE key simultaneously. The display will go dark to acknowledge that eight hour mode has been invoked, and another keypress will be required to turn the backlight back on.

  • Page 53: Controlling The Generators

    Controlling the Generators : Generators Overview Controlling the Generators Generators Overview The Portable One Dual Domain contains both a digital generator and an analog generator. Both generators operate simultaneously, but they are controlled independently. The analog generator can generate sine waves from 10 Hz to 120 kHz, with amplitudes from zero up to around 26 Vrms Balanced or 13 Vrms Unbalanced.

  • Page 54: Generator Control Modes

    Generator Controls Both the analog and digital generators operate simultaneously. The Portable One Dual Domain has four control modes, which allow control of different attributes of the digital and analog generators: Analog Audio Generator Mode (A:GEN) - allows control of the...
  • Page 55 Generator Only Panel. To get to the Generator Only Panel, press PANELS until you see one of the screens shown below. OUTPUT ANALOG DIGITAL Figure 4-10 Generator Control Modes (Generator Only Panel) Portable One Dual Domain User's Manual Pg 4-13...

  • Page 56: Analog Generator Mode (A:gen)

    40 Ω Unbalanced, 40 Ω Balanced, 150 Ω Balanced, loading, see page 4-18. and 600 Ω Balanced configurations. The upper center soft key allows control of the units for analog generator amplitude. Pg 4-14 Portable One Dual Domain User's Manual...

  • Page 57: Digital Audio Generator Mode (D:gen)

    The PASS selection takes the embedded audio data directly from the digital input and retransmits it without alteration. The status bits are not passed through - the outgoing status bits are set on the Status Bits Portable One Dual Domain User's Manual Pg 4-15...

  • Page 58: Digital Sample Rate Generator Mode (D:rate)

    4-99 . lag in UI (Unit Intervals). Pressing the upper right soft key will change the amount of lead or lag. The available options are 0, 0.5, 1, 5, 10, or 50 UI. Pg 4-16 Portable One Dual Domain User's Manual...

  • Page 59: Digital Jitter Generator Mode (D:jit)

    IMPORTANT NOTE: All jitter amplitudes are calibrated in detailed discussion of units, see peak values on the Portable One Dual Domain. This differs page 4-93. from some other instruments which may generate and measure jitter calibrated in peak-to-peak values. The peak value is generally half of the peak-to-peak value.

  • Page 60: Analog Generator Loading

    (in dBm) to be dissipated in a load of user-specified impedance. If you are using a load with a different impedance, the power calculation will not be correct. The generator’s Pg 4-18 Portable One Dual Domain User's Manual...
  • Page 61 The impedance reference used in dBm calculations can be selected on instructions for the Analyzer Only panel when dBm units are selected. setting the dBm reference value, see page 4-97. Portable One Dual Domain User's Manual Pg 4-19...

  • Page 62: Digital Status Bits

    The lower left soft key changes depending on the Consumer/Professional mode. In Consumer mode, this soft key controls the Copyright bit. This status bit provides copy protection to Pg 4-20 Portable One Dual Domain User's Manual...
  • Page 63 The lower right soft key controls the validity flag. This bit can be used to indicate whether the data is valid or invalid. Portable One Dual Domain User's Manual Pg 4-21...

  • Page 64: Controlling The Analyzer

    Operation Controlling the Analyzer Analyzer Overview The Portable One Dual Domain analyzer can make a number of measurements in both the analog and digital domains. Most conventional measurements can be taken in either domain. The instrument is generally configured for only one type of measurement at a time.
  • Page 65 Operation Controlling the Analyzer : Analyzer Overview In the digital domain only: Jitter Digital data integrity Sample rate, amplitude, and delay of digital carrier signal Status Bits Portable One Dual Domain User's Manual Pg 4-23...

  • Page 66: Analog And Digital Modes

    ‘DIGITAL’ on the mode indicator. These dots are used to determine which measurement function will be selected by each FUNCTION button. Most of the FUNCTION buttons choose the same Pg 4-24 Portable One Dual Domain User's Manual...

  • Page 67: Input Selection Buttons

    Only one digital input should be connected at any time. When the internal gen-mon paths are used, the generator outputs are still active. Signal may still exist on the output connectors, and Portable One Dual Domain User's Manual Pg 4-25...

  • Page 68: Function Keys

    DIGITAL I/O function. FUNCTION Descriptions The following sections describe in detail each measurement function. The Main Panel is shown in that measurement function, as well as a block diagram of the measurement performed. Pg 4-26 Portable One Dual Domain User's Manual...
  • Page 69 For measurements that are the same in both digital and analog domains, only the analog is shown in the block diagram. The digital function is essentially the same, except implemented with DSP. Portable One Dual Domain User's Manual Pg 4-27...

  • Page 70: Amplitude

    V, dBV, dBu, dBm, dBr, dBg, or W. In digital mode, the units, see page 4-93. available units are FS, dBFS, and dBr. The units are selected by the upper left soft key. Pg 4-28 Portable One Dual Domain User's Manual...
  • Page 71 WTD – The ‘weighted’ selection allows selection of a variety of weighting filters with a selectable lower band limit. The lower center soft key selects the lower band limit (<10 Hz or 400 Hz). Portable One Dual Domain User's Manual Pg 4-29...
  • Page 72 AUX2 (analog only) – Weighted with optional weighting filter installed in slot 2. If there is no filter in slot 2, the display will read ‘NO AUX2’ and no filter is selected. Pg 4-30 Portable One Dual Domain User's Manual...

  • Page 73: Noise

    ‘dB’ unit. If this unit is selected, and units, see page 4-93. both the generator and analyzer are in analog mode, a special Portable One Dual Domain User's Manual Pg 4-31...
  • Page 74 Noise and Amplitude functions with different filter and detector selections so that noise can be measured to two different standards simply by pressing the AMPL/NOISE button twice. Pg 4-32 Portable One Dual Domain User's Manual...

  • Page 75: Level

    The top right soft key makes this selection. The INPUT A and INPUT B keys are used to select the main and alternate channels for measurement. Subsequent presses of the Portable One Dual Domain User's Manual Pg 4-33...
  • Page 76 B. The Level function provides the best analog amplitude accuracy of which the Portable One Dual Domain is capable, as long as the For more measured signal is above about 10 mV. The analog Amplitude information on function provides wider dynamic range, but at reduced accuracy.

  • Page 77: Thd+N (Total Harmonic Distortion Plus Noise)

    % and dB are provided. units, see page 4-93. These units measure the amplitude of the filtered signal relative to the amplitude of the unfiltered signal. Portable One Dual Domain User's Manual Pg 4-35...
  • Page 78 10% THD+N. For the digital analyzer, the signal must be above about -80 dBFS. If the signal amplitude is too low, tuning operation will cease and the display will read ‘Low’. Pg 4-36 Portable One Dual Domain User's Manual...
  • Page 79 In digital mode, the lower right soft key selects the upper band limit (15 kHz, 20 kHz, Sample Rate/2, 22 kHz, 22 kHz-QPK). The Sample Rate/2 selection always selects an Portable One Dual Domain User's Manual Pg 4-37...
  • Page 80 The 80 kHz lowpass filter is the most commonly used, since it eliminates wideband noise while passing the 2nd and 3rd harmonics of frequencies within the audio band. Pg 4-38 Portable One Dual Domain User's Manual...
  • Page 81 More detail on determining which type of unwanted sound is causing the problem is given in the section ‘Isolating Sources of THD+N’ on page 4-37. Portable One Dual Domain User's Manual Pg 4-39...
  • Page 82 While some devices may create more or less harmonic distortion for different fundamental frequencies, the other sources of unwanted sound will contribute to the reading no matter what fundamental frequency is used. Pg 4-40 Portable One Dual Domain User's Manual...

  • Page 83: What Signal Is Dominant

    (harmonics) of the fundamental. Therefore, for most devices it is reasonable to limit the bandwidth to around four times the highest fundamental frequency of interest. Portable One Dual Domain User's Manual Pg 4-41...
  • Page 84 -100 -120 -140 100k 200k 300k The THD+N now measures 0.185 %. From this, we can determine that the hum product was contributing 0.044 % to the THD+N reading. Pg 4-42 Portable One Dual Domain User's Manual...
  • Page 85 The THD+N now measures 0.0390 %, which is precisely the theoretical THD for these distortion products. The contribution of the remaining noise (between 400 Hz and 22 kHz) is negligible. Portable One Dual Domain User's Manual Pg 4-43...

  • Page 86: Changes With Frequency

    THD+N sweep, it is a good idea to run it several times. If it varies significantly (or disappears) with successive runs of the test, then it is probably a cancellation problem. In this case, the low THD+N reading is incorrect. Pg 4-44 Portable One Dual Domain User's Manual...

  • Page 87: Changes With Amplitude

    (Log Scale) Note that for some low-distortion devices, the flat area before clipping may shrink or not exist at all. The THD+N measurement may be noise-dominated at all amplitudes below the clipping threshold. Portable One Dual Domain User's Manual Pg 4-45...

  • Page 88: Thd+N At 100% (Or 0 Db)

    FIX-TUNE will give 100% readings unless the filter is tuned to the frequency of the incoming fundamental tone. GEN-TRACK will give 100% readings if the frequency of the incoming fundamental tone is different from the generator frequency. Pg 4-46 Portable One Dual Domain User's Manual...

  • Page 89: Isolating Sources Of Thd+N

    (including hum), you will see a peak in the graph. If the signal is dominated by random noise, it will be essentially smooth. It may slope gently in one direction or the other, usually upward with increasing frequency. Portable One Dual Domain User's Manual Pg 4-47...

  • Page 90: Sinad

    The top center of the display shows the units, see page 4-93. amplitude of the signal before filtering. The amplitude units may be selected by pressing the top center soft key. Pg 4-48 Portable One Dual Domain User's Manual...
  • Page 91 RMS detector in accordance with CCIR-468. The 22 Hz lower limit is only available if the upper limit is 22 kHz; the <10 Hz lower limit is only available with other upper limits. Portable One Dual Domain User's Manual Pg 4-49...

  • Page 92: Phase

    GEN-MON B GEN-MON B GEN-MON A GEN-MON B Figure 4-25 Block Diagram of Analog Phase Measurement The upper left corner of the display shows the phase difference. The units are always degrees. Pg 4-50 Portable One Dual Domain User's Manual...
  • Page 93 0 or very close to 180 degrees. If the +180 to -180 degree range is used for these measurements, readings near zero could read on either end of the range. Portable One Dual Domain User's Manual Pg 4-51...
  • Page 94 HOLDRANGE function is used) the display will show the word ‘Low’, and there will be no phase reading. If the S/N ratio in either channel is less than 40 dB, the reading may be unstable, especially at low frequencies. Pg 4-52 Portable One Dual Domain User's Manual...

  • Page 95: Imd

    CHANNEL A SPEAKER/ JUMPER HEADPHONE READING INPUT PRIMARY MONITOR TERMINATION READING DEMODULATOR/ DETECTOR FILTER INPUT RANGING SECONDARY READING LCD DISPLAY DETECTOR CHANNEL B INPUT TERMINATION Figure 4-27 Block Diagram of Analog IMD Measurement Portable One Dual Domain User's Manual Pg 4-53...
  • Page 96 60 Hz. Under the DIN standard, a 250 Hz lower tone with an 8 kHz upper tone is a better choice. Pg 4-54 Portable One Dual Domain User's Manual...

  • Page 97: Ratio

    The units available units, see page 4-93. are dB and X/Y. The dB selection will compute the amplitude of the selected channel relative to the reference channel. The X/Y selection Portable One Dual Domain User's Manual Pg 4-55...
  • Page 98 8 mV, the display will read ‘Low’. A table summarizing this information is shown on the following page. Digital Ratio mode does not have this limitation or the Mode option. Pg 4-56 Portable One Dual Domain User's Manual...
  • Page 99 B Input, >8mV Generator B, <8mV Channel Balance A Input, >8mV B Input, >8mV Either Mode Channel Balance B Input, >8mV A Input, >8mV Either Mode >8mV >8mV Either Mode <8mV <8mV Invalid Portable One Dual Domain User's Manual Pg 4-57...

  • Page 100: W+F (Wow And Flutter)

    The recording is then played back, and the output is sent to the Portable One Dual Domain for analysis. The instrument determines the amount of speed fluctuation and the amount of speed error. Pg 4-58 Portable One Dual Domain User's Manual...
  • Page 101 The lower right soft key selects the reading display mode. PEAK and 2σ are supported. Selecting PEAK will give the maximum value of the Portable One Dual Domain User's Manual Pg 4-59...
  • Page 102 B for measurement. Wow and flutter of 3-head tape machines should not be measured during simultaneous record-reproduce mode, since this will result in spectral nulls which can give erroneously low readings. Pg 4-60 Portable One Dual Domain User's Manual...

  • Page 103: Xtalk (Crosstalk)

    Block Diagram of Analog Crosstalk Measurement In Crosstalk measurement function, the selected channel is always the non-driven channel, and it is from this channel that the main measurement is taken. The alternate channel is the driven channel, Portable One Dual Domain User's Manual Pg 4-61...
  • Page 104 The signal on the driven channel must be at least 8 mV for proper functioning of the frequency counter for bandpass tuning. If it is not, both the XTALK reading and the frequency reading will read ‘Low’. No fixed filters are available. Pg 4-62 Portable One Dual Domain User's Manual...

  • Page 105: Ac Mains (Power Line Monitor)

    Harmonic Distortion plus Noise) of the supply line, with 20 kHz bandwidth limiting. The only available units are percent. The upper center soft key can be used to turn the measurement off. Portable One Dual Domain User's Manual Pg 4-63...
  • Page 106 AMPLITUDE controls. In AC Mains mode, the Main Panel also provides access to the Self Test. See Appendix F for more detail. Pg 4-64 Portable One Dual Domain User's Manual...

  • Page 107: Gen Load

    The upper left section of the display shows the measured input impedance in ohms. No other units are available, and the upper left soft key has no effect. The upper right section of the display shows the Portable One Dual Domain User's Manual Pg 4-65...
  • Page 108 If the impedance curve shows very sharp peaks or dips, one should suspect that the load is very reactive. A reactive load will have an impedance that varies with frequency. Pg 4-66 Portable One Dual Domain User's Manual...

  • Page 109: Jitter

    The upper center section of the display shows the peak-to-peak voltage units, see page 4-93. of the incoming digital signal, in Vpp. There are no other units available. The upper center soft key selects the termination impedance Portable One Dual Domain User's Manual Pg 4-67...
  • Page 110 (the ‘peak-calibrated RMS value’ of the jitter). IMPORTANT NOTE: All jitter amplitudes are calibrated in peak values on the Portable One Dual Domain. This differs from some other instruments which may generate and measure jitter calibrated in peak-to-peak values. The peak value is generally half of the peak-to-peak value.
  • Page 111 The INPUT A and INPUT B buttons toggle between the rear panel inputs (an ‘I’ is shown in the reading displays) and the internal gen-mon path (a ‘G’ is shown in the reading displays). Portable One Dual Domain User's Manual Pg 4-69...

  • Page 112: Digital I/O

    In absolute mode, the units are Hz, which is equivalent to samples per second. In relative mode, the units are ppm, or deviation from ideal in parts-per-million. Pg 4-70 Portable One Dual Domain User's Manual...
  • Page 113 The upper right section of the display shows the delay of the signal, information on either from the Portable One Dual Domain output or the Reference connecting to the Input on the rear panel. The upper right soft key selects among the Reference Input, available units: UI (unit intervals), smp (samples), or s (seconds).
  • Page 114 AUTO in Consumer mode. When AUTO mode is used, the word length will default to 24 bits if no signal is applied. The sweep mode is not available in Digital I/O measurement function. Pg 4-72 Portable One Dual Domain User's Manual...

  • Page 115: Data Check

    A . The upper left soft key selects between real-time and totalize displays. The real-time display will show the number of errors on that channel within a 6000-sample interval. The totalize display Portable One Dual Domain User's Manual Pg 4-73...
  • Page 116 The lower section of the display can show two different binary displays of the data, selectable by the lower right soft key. The following are available: ACTIVEBIT – Shows which bits are changing state ACTUALBIT – Shows the actual value of each bit Pg 4-74 Portable One Dual Domain User's Manual...
  • Page 117 The pseudorandom sequence is the same as the one used in Audio Precision’s System One BITTEST program, so the two may used interchangeably as pseudorandom generator and analyzer.

  • Page 118: Status Bits

    It has two states: copy permitted (OK) and copy prohibited (NO). In Professional mode, this area displays the signal’s origin, if the origin is encoded in the status bits. The origin is generally a text string. Pg 4-76 Portable One Dual Domain User's Manual...
  • Page 119 ‘C’ is for the Confidence flag and the second ‘C’ is for the Coding flag. If any flag is set, its letter will be shown. If the flag is not set, there will be a blank space in its letter position. Portable One Dual Domain User's Manual Pg 4-77...
  • Page 120 Validity flag, but the Validity flag takes priority. If the Validity flag generating jitter, see indicates invalid data and the jitter generator is on, only the V will be page 4-17. shown. Pg 4-78 Portable One Dual Domain User's Manual...

  • Page 121: Bargraphs

    If desired, both may be highlighted for simultaneous adjustment. When the desired endpoint or endpoints are highlighted, the AMPLITUDE controls adjust the value. The step size of the INC/DEC and ±10dB buttons depends on the measurement function selected. Portable One Dual Domain User's Manual Pg 4-79...
  • Page 122 The Portable One Dual Domain remembers separate units for each numerical display and the bargraph for each measurement function. Pg 4-80 Portable One Dual Domain User's Manual...

  • Page 123: Sweeps

    The value for the top of the graph is shown in the top left corner of the display. To change it, press the top left soft key to highlight it, then use the AMPLITUDE controls to adjust the value. Portable One Dual Domain User's Manual Pg 4-81...
  • Page 124 Sweeps of LEVEL do not have the 150 step choice due to memory limitations. External sweeps are a special type of sweep in which the Portable One Dual Domain generator does not perform the stimulus changes – they come directly from the device-under-test, usually from a test tape or CD.
  • Page 125 MEDIUM sweep speed inserts a time delay of approximately 0.9 sec after changing the generator setting, before the analyzer begins taking data. Its principal intent is for use on a Portable One Dual Domain generator feeding an audio transmission link while the analyzer section of another Portable makes EXTERNAL sweep measurements at the receiving end.

  • Page 126: Continuous Sweeps

    Only one data set is kept in memory. Each point is replaced as a new point is taken, so the data set always includes the most recent data. Only this data will be saved and recalled. Pg 4-84 Portable One Dual Domain User's Manual...

  • Page 127: External Sweeps

    Printing The Portable One Dual Domain has the ability to print directly to a printer connected to the external printer port located on the rear panel of the instrument.
  • Page 128 Bargraph Panel, or the Recall/Save Panel, the printout will be an exact graphical image (or ‘screen dump’) of the current display. For example, the following figure shows a printout from the Setup Panel: Figure 4-54 Screen Dump of Setup Panel Pg 4-86 Portable One Dual Domain User's Manual...
  • Page 129 After pressing any of these buttons, you will be returned to the Sweep Panel with the normal menu items. Following are examples of the three types of printouts: Figure 4-56 High-Resolution Graph Printout Portable One Dual Domain User's Manual Pg 4-87...
  • Page 130 No matter what PRINT mode is chosen, the display colors will invert while the Portable One Dual Domain is sending the data to the printer. When the display returns to its normal color scheme, all the data has been sent to the printer, so you may proceed to the next test.
  • Page 131 The self test does not use the PRINT key for printing the test results. See Appendix F for more details on running and printing the self test. Portable One Dual Domain User's Manual Pg 4-89...

  • Page 132: Saving And Recalling Setups

    Controlling the Analyzer : Saving and Recalling Setups Operation Saving and Recalling Setups The Portable One Dual Domain has the facility of storing thirty different test setups in memory. Each of these setups stores all the settings necessary to repeat a measurement exactly, so that a commonly-run test can be stored and recalled with only a few keypresses.
  • Page 133 AMPLITUDE or FREQUENCY knob. Using the +10 dB, -10 dB, x10, and ÷10 keys will change the character by steps of 16. Portable One Dual Domain User's Manual Pg 4-91...

  • Page 134: Printing Saved Data

    For information on setting the print mode and the different types of printer output, see the section on Printing, starting on page 4-85. Pg 4-92 Portable One Dual Domain User's Manual...

  • Page 135: Units

    Operation Units : Analog amplitude units Units The Portable One Dual Domain supports a full set of industry-standard units. For a Quick Analog amplitude units Reference to Units, see V (Volts) – Basic unit of amplitude Appendix A. Vp – Peak voltage dB –...
  • Page 136 The X/Y unit is available only in Ratio mode. The reading is a raw result of dividing one amplitude reading by another. This is usually used for gain or attenuation through a device. Pg 4-94 Portable One Dual Domain User's Manual...
  • Page 137 In fact, it is defined as the voltage in decibels relative to 0.7764 Volts, which is the voltage across a 600 Ω resistor dissipating one milliwatt. Portable One Dual Domain User's Manual Pg 4-95...

  • Page 138: Analog Power Units

    600 Ω. If you are using 600 Ω equipment, you can use dBm units. You can easily measure the information input impedance of a device using the Portable One Dual Domain’s Gen about the Gen Load function.

  • Page 139: Time And Frequency Units

    3 kHz or 3.15 kHz intended frequency using the following formula: • where D is the frequency deviation and F is the intended frequency. Portable One Dual Domain User's Manual Pg 4-97...

  • Page 140: Phase Units

    360 degrees they are back in phase. However, the scale may be shifted to span any 360-degree area, generally between –360 degrees and +360 degrees. Pg 4-98 Portable One Dual Domain User's Manual...

  • Page 141: Digital Time Units

    F is the measured frequency and Fr is the reference frequency. Digital time may also be measured in samples. The time of each sample is the reciprocal of the sample rate. Portable One Dual Domain User's Manual Pg 4-99...

  • Page 142: Digital Amplitude Units

    You may set the reference to be equivalent to the current main measurement reading by pressing the dBr ZERO key near the upper right corner of the display. If you go to the Analyzer Pg 4-100 Portable One Dual Domain User's Manual...
  • Page 143 AMPLITUDE controls. page 4-1. Portable One Dual Domain User's Manual Pg 4-101...
  • Page 144 Units : Digital amplitude units Operation NOTES: Pg 4-102 Portable One Dual Domain User's Manual...
  • Page 145 Operation Units : Digital amplitude units Portable One Dual Domain User's Manual Pg 4-103...

  • Page 146: Applications

    Portable One Dual Domain units at both ends of the link, or a compatible sweeping generator at the “send” end and a Portable One Dual Domain at the “receive” end. At the “send” end, set the generator to the desired amplitude and select SWEEP mode.

  • Page 147: Analog Tape Recorder Alignment And Performance Verification

    EXTERNAL mode in SWEEP mode. EXTERNAL mode will follow an increasing-frequency or decreasing-frequency sequence of tones on the reference tape while ignoring any voice announcements between tones. If dBr units are used, the mid-frequency (usually 1 kHz) Pg 5-2 Portable One Dual Domain User's Manual...

  • Page 148: Record-Reproduce Mode

    Thus, a flat phase-vs-frequency graph from 1 kHz to high frequencies indicates proper alignment with no chance of accidentally aligning for a complete rotation at 15 kHz. Portable One Dual Domain User's Manual Pg 5-3...
  • Page 149 The resulting graph may be printed for permanent documentation of recorder performance. For k3 (third harmonic) distortion measurements such as when measuring MOL (maximum output level), install an optional bandpass Pg 5-4 Portable One Dual Domain User's Manual...

  • Page 150: Compact Disc Players

    Many test discs have a sweep of about 50 seconds duration across the audio band which is suitable for Portable One Dual Domain. LEVEL function with dBr units should be selected. Select SWEEP mode, and further select EXTERNAL mode with the top center soft key and GLIDE with the top right soft key.
  • Page 151 Applications Compact Disc Players Pg 5-6 Portable One Dual Domain User's Manual...

  • Page 152: Detailed Technical Diagrams

    Detailed Technical Diagrams This chapter contains several diagrams to assist your understanding of how the Portable One Dual Domain accomplishes its measurement tasks. While knowledge of the internal circuitry is not required for operation of the instrument, it may be more intelligently applied, and its limitations may be better understood, by referring to these diagrams.
  • Page 153 TRIGGER OUTPUT SOURCE IMPEDANCE CHANNEL SIGNAL SUMMATION BACK OUTPUT TERMINATION ATTENUATOR ANALOG MAIN OUTPUTS OSCILLATOR BALANCING TRANSFORMER OUTPUT SQUARE AMPLIFIER SOURCE WAVE IMPEDANCE GENERATOR CHANNEL BACK TERMINATION Figure 6-1 Analog Block Diagram Pg 6-2 Portable One Dual Domain User's Manual...

  • Page 154: Digital Section

    The transmitter drives the optical output directly, and the electrical outputs through a variable-voltage driver. The electrical output is transformer-coupled to the balanced (AES/EBU) and unbalanced (SPDIF) outputs. Portable One Dual Domain User's Manual Pg 6-3...
  • Page 155 READING MONITOR DIGITAL Generator Waveform Trigger TRIGGER OUTPUT Input Clocks Jitter Signal Output Clocks CLOCK GENERATOR SPDIF JITTER JITTER GENERATOR MODULATOR AES/EBU AES/EBU DRIVER TRANSMITTER Output OPTICAL Figure 6-2 Digital Block Diagram Pg 6-4 Portable One Dual Domain User's Manual...
  • Page 156 These signals are converted to analog waveforms by a D/A converter, and then they are sent to the rear panel INPUT MONITOR and READING MONITOR connectors in digital analysis modes. Portable One Dual Domain User's Manual Pg 6-5...

  • Page 157: Analog Generator Output Circuit

    When generator monitor inputs are used, the connection (labeled GEN MON in the diagram) is made directly across the output connector terminals. Note that the power amplifier, output transformer, and output attenuator are common to both channels. Pg 6-6 Portable One Dual Domain User's Manual...
  • Page 158 Analog Generator Output Circuit Detailed Technical Diagrams Figure 6-3 Simplified Analog Generator Output Circuit Portable One Dual Domain User's Manual Pg 6-7...

  • Page 159: Analog Analyzer Input Circuit

    Both the attenuator setting and the amplifier gain are microprocessor-controlled as part of the automatic ranging circuit, to maintain the signal level fed to the remainder of the analyzer at an optimum level for low noise and distortion. Pg 6-8 Portable One Dual Domain User's Manual...
  • Page 160 Analog Analyzer Input Circuit Detailed Technical Diagrams Figure 6-4 Simplified Analog Analyzer Input Circuit Portable One Dual Domain User's Manual Pg 6-9...

  • Page 161: Cable Diagrams

    2 Conductor shielded cable (Balanced) or Female Sleeve Ring Note: Some balanced phone jacks may require different pin connections. Check the specifications for your device-under-test for proper configuration. Figure 6-5 Balanced Cable Connections Pg 6-10 Portable One Dual Domain User's Manual...

  • Page 162: Unbalanced Connections

    1/4" Phone Plug or Female Sleeve Shield not connected this end XLR Male 2 Conductor shielded cable BNC Connector or Female Shield not connected this end Figure 6-6 Preferred Unbalanced Cable Connections Portable One Dual Domain User's Manual Pg 6-11...
  • Page 163 RCA/Phono Plug or Female Single Conductor shielded cable XLR Male 1/4" Phone Plug or Female Sleeve Single Conductor shielded cable XLR Male BNC Connector or Female Figure 6-7 Unbalanced Connections Using Single-Conductor Cable Pg 6-12 Portable One Dual Domain User's Manual...

  • Page 164: Unbalanced Stereo Connections

    2 Conductor shielded cable Stereo Left Plug Channel Sleeve Ring Right Channel XLR Male Single conductor shielded cable or Female Left Channel Stereo Plug Sleeve Ring Right Channel Figure 6-8 Stereo Unbalanced Cable Connections Portable One Dual Domain User's Manual Pg 6-13...
  • Page 165 Detailed Technical Diagrams Cable Diagrams NOTES: Pg 6-14 Portable One Dual Domain User's Manual...

  • Page 166: Appendix A - Units Quick Reference

    Basic unit of time Time Samples Time Unit Intervals Amplitude Volts; Basic unit of amplitude Amplitude Peak Voltage (instantaneous) Power Watts; Basic unit of power Amplitude Pure number resulting from division of two numbers Portable One Dual Domain User's Manual Pg 7-1...
  • Page 167 Appendix A - Units Quick Reference Pg 7-2 Portable One Dual Domain User's Manual...

  • Page 168: Appendix B - Option Filter Installation

    Appendix B - Option Filter Installation Appendix B - Option Filter Installation Optional filters can be purchased with the Portable One Dual Domain, or they can be purchased later. If you purchase option filters after your instrument was originally delivered, you will need to install them yourself.
  • Page 169 They are labeled FILTER1 and FILTER2 on the circuit board. Remove any filters to be replaced and add any filters to be installed. Plug in the filters in the orientation shown in Figure 8-2. Pg 8-2 Portable One Dual Domain User's Manual...
  • Page 170 Appendix C), you may want to do it now while the case is open. 6. Turn the chassis assembly over and reassemble it into the inverted case top. Make sure that the front and rear panel edges go into their slots in the case. Portable One Dual Domain User's Manual Pg 8-3...
  • Page 171 Then go to SWEEP mode and run a frequency sweep to see the response of the filter. For more information on the AMPL function, see page 4-28. For more information on sweeping, see page 4-81. Pg 8-4 Portable One Dual Domain User's Manual...
  • Page 172 Appendix B - Option Filter Installation Portable One Dual Domain User's Manual Pg 8-5...

  • Page 173: Appendix C - Monitor Source Selection

    Appendix C - Monitor Source Selection Appendix C - Monitor Source Selection The Portable One Dual Domain has built-in monitor circuitry to allow you to audibly monitor the signal being analyzed. You can hear the sound either from the built-in speaker or through stereo headphones connected to the MONITOR jack on the front panel.
  • Page 174 4. Remove the chassis and panel assembly from the top half of the plastic case by lifting directly upwards. Turn the chassis over so that it is right-side-up. Pg 9-2 Portable One Dual Domain User's Manual...
  • Page 175 7. If you want to add or replace an option filter as well, you may want to do it now, while you have the unit open. See Appendix B for instructions on changing option filters. Portable One Dual Domain User's Manual Pg 9-3...
  • Page 176 ATTENTION: Do not overtighten the screws! Tighten them only to the point that they feel snug and will not loosen by themselves. 10. Reconnect power to the unit and turn it on. Pg 9-4 Portable One Dual Domain User's Manual...

  • Page 177: Appendix D - Line Voltage And Fuse Selection

    Appendix D - Line Voltage and Fuse Selection Appendix D - Line Voltage and Fuse Selection The Portable One Dual Domain is configured at the factory for the line voltage at its intended destination, so usually the voltage will be correct unless the unit has been transported into another area.

  • Page 178: Changing The Line Voltage Selection

    The voltage selector card and indicator pin should now be in one of the positions shown on the following figure. Pg 10-2 Portable One Dual Domain User's Manual...

  • Page 179: Checking The Fuse Block Orientation

    If the fuse block is in the correct orientation for the selected voltage, skip forward to the section on Checking the Fuses (page 10-5). If not, continue with the next section, ‘Changing the Fuse Block Orientation’. Portable One Dual Domain User's Manual Pg 10-3...

  • Page 180: Changing The Fuse Block Orientation

    Screw Pedestal. The Fuse Block should sit flat, parallel to the Cover. Tighten the screw. Figure 10-5 shows the two fuse block orientations. 4. Check the fuses as instructed in the next section. Pg 10-4 Portable One Dual Domain User's Manual...

  • Page 181: Checking The Fuses

    4. Replace fuses if necessary. Replace Cover, making sure that indicator tip is inserted in correct indicator hole for the selected line voltage (see Figure 10-1 for location of indicator holes). Portable One Dual Domain User's Manual Pg 10-5...
  • Page 182 Appendix D - Line Voltage and Fuse Selection Checking the Fuses Pg 10-6 Portable One Dual Domain User's Manual...

  • Page 183: Appendix E - Filter Shapes

    One Dual Domain. A number of other filter shapes are available as option filters. 100k 200k Shapes of Bandwidth Limiting Filters - 22 Hz Highpass, 400 Hz Highpass, 22 kHz Lowpass, 30 kHz Lowpass, 80 kHz Lowpass. Portable One Dual Domain User's Manual Pg 11-1...
  • Page 184 CCIR-468-4 DOLBY Shape of CCIR Filter - CCIR-468-4 has the 0 dB point at 1 kHz, while the Dolby curve has the 0 dB point at 2 kHz. Shape of A-weighting Filter. Pg 11-2 Portable One Dual Domain User's Manual...

  • Page 185: Appendix F - Self Test

    Appendix F - Self Test Appendix F - Self Test The Portable One Dual Domain has the capability of performing a functional self test. This can be run periodically to make certain that your instrument is operating properly. Before running the self test, let the instrument warm up for at least an hour.
  • Page 186 ‘VERSION’ is the version number of the analog program. These version numbers apply to all features of the Portable One Dual Domain, not just the self test. ATTENTION! Always disconnect all cables from the generator outputs before running the self test.
  • Page 187 Following is a sample printer output from a self test. The unit has been miscalibrated to generate failures: Audio Precision Portable One Dual Domain Self Test Version 1.0 Test Number and Description, Low Limit,Measured, High Limit, P/F TEST 0.01 997 Hz D:THD+N -140.0dB...
  • Page 188 10 Hz FLATNESS -0.20 dB -0.02 dB 0.20 dB PASS TEST 3.0B 10 Hz FLATNESS -0.20 dB -0.03 dB 0.20 dB PASS TEST 3.1A 20 Hz FLATNESS -0.05 dB 0.01 dB 0.05 dB PASS Pg 12-4 Portable One Dual Domain User's Manual...
  • Page 189 TEST 5.2 A-WEIGHT FILTER -6.50 dB -2.58 dB -0.50 dB PASS TEST 5.3 CCIR WTG FILTER -20.80dB -19.86dB -18.80dB PASS TEST 5.4 CCIR WTG FILTER -0.20 dB -0.06 dB 0.20 dB PASS Portable One Dual Domain User's Manual Pg 12-5...
  • Page 190 PASS TEST 8.1 1 kHz PHASE -2.0 PASS TEST 8.2 20 kHz PHASE -2.0 deg -0.2 PASS TEST 9.0 WOW AND FLUTTER 0.950 % 1.003 % 1.050 % PASS Failed Self Test Pg 12-6 Portable One Dual Domain User's Manual...

  • Page 191: Appendix G - Specifications

    Calibration with other amplitude units is based upon an equivalent sinewave having the same Vpp amplitude. Note 2 System specification including contributions from both generator and analyzer. Generator load must be ≥600 Ω. Portable One Dual Domain User's Manual Pg 13-1...
  • Page 192 Calibration with other amplitude units is based upon an equivalent sinewave having the same Vpp amplitude. Note 2 System specification including contributions from both generator and analyzer. Generator load must be ≥600 Ω. 200 Ω with option “EURZ”. Note 3 Pg 13-2 Portable One Dual Domain User's Manual...
  • Page 193 ±0.50 dB (-3 dB BW typically >300 kHz) 50 kHz-120 kHz Frequency Meter Related (both channels) Measurement Range 10 Hz-200 kHz ±0.01% [±100 PPM] Accuracy Resolution 5 digits Minimum Input 25 mV Portable One Dual Domain User's Manual Pg 13-3...
  • Page 194 ≤ 1.5 µV [-114 dBu] 22 Hz-22 kHz BW ≤ 1.0 µV [-118 dBu] A-weighted ≤ 5.0 µV [-104 dBu] CCIR-QPk Note 4 Combined with 22 Hz highpass per CCIR Rec 468. Pg 13-4 Portable One Dual Domain User's Manual...
  • Page 195 “1/V” fashion for inputs below 25 mV [-30 dBu] Note 5 System specification including contribution from generator. Generator residual THD may limit system performance below 25 Hz if output is >20.0 Vrms balanced, or 10.0 Vrms unbalanced. Portable One Dual Domain User's Manual Pg 13-5...
  • Page 196 Uses the 1/3 octave bandpass filter to enhance the measured range in the presence of wideband noise. Alternate (interfering) channel input must be ≥5 mV. Note 7 System specification including contribution from generator. Pg 13-6 Portable One Dual Domain User's Manual...
  • Page 197 28.8 kHz-52.8 kHz AES/EBU 57.6 kHz-105.6 kHz with 96 kHz option Sample Rate Resolution 1/128 Hz (approx. 0.0078 Hz) ±0.002% [±20 PPM] using internal reference, Sample Rate Accuracy lockable to external reference Portable One Dual Domain User's Manual Pg 13-7...
  • Page 198 Dither (Sine, IMD, and Square waveforms) Probability Distribution Triangular or rectangular; independent for each channel Spectral Distribution Flat (white) or Shaped (+6 dB/oct, triangular only) Amplitude Automatically tracks word width or off Pg 13-8 Portable One Dual Domain User's Manual...
  • Page 199 -30 dB below jitter signal REFERENCE INPUT CHARACTERISTICS Input Formats AES/EBU (per AES 3-1992) Input Sample Rates 28.8 kHz-52.8 kHz AES/EBU (must equal desired output rate) 400 mVpp Minimum Input Amplitude Nominally 110 Ω Input Impedance Portable One Dual Domain User's Manual Pg 13-9...
  • Page 200 CCIR QPk per CCIR Rec 468 CCIR RMS per AES 17 Residual Noise -140 dBFS unweighted -142 dBFS A-weighted -134 dBFS CCIR RMS -130 dBFS CCIR QPk -139 dBFS 20 kHz LP -140 dBFS 15 kHz LP Pg 13-10 Portable One Dual Domain User's Manual...
  • Page 201 (5 Hz-21.0 kHz at 44.1 ks/sec) (5 Hz-23.0 kHz at 48.0 ks/sec) ±0.01% of reading or 0.0001% of sample rate, Accuracy whichever is greater Resolution 0.003% of reading or 0.0001% of sample rate, whichever is greater Portable One Dual Domain User's Manual Pg 13-11...
  • Page 202 Validity Flag Displayed for selected channel Parity Displayed for total signal (both channels combined) Signal Confidence Displayed for total signal (both channels combined) Receiver Lock Displayed for total signal (both channels combined) Pg 13-12 Portable One Dual Domain User's Manual...
  • Page 203 Amplitude is typically 0-2.83 Vpp. Reading Buffered version of the analog or digital analyzer output signal after all filtering and gain stages. Amplitude is typically 0-2.83 Vpp. AUDIO MONITOR Power Output Typically 1 Watt Portable One Dual Domain User's Manual Pg 13-13...
  • Page 204 Emission and Immunity levels are influenced by the shielding performance of the connecting cables. The shielding performance of the cable will depend on the internal design of the cable, connector quality, and the assembly methods used. EMC compliance was evaluated using Audio Precision XLR type cables, part number CAB-AES. Pg 13-14...
  • Page 205 Analog generator output circuit 6-6 - 6-7 CCIR filter shape (graph) 11-2 Analog inputs and outputs 3-3 - 3-5 CD player measurements 5-5 Analog trigger output 3-9 Changing IMD tones 4-54 Analog vs. digital 3-1 Portable One Dual Domain User's Manual Pg 14-1...
  • Page 206 4-93, 7-1 End-to-end testing 5-1 dBFS unit 4-100, 7-1 EQ adjustments dBg unit 4-93, 7-1 tape recorder 5-2 dBm unit 4-96, 7-1 Error flags (digital) 4-77 dBm vs. dBu 4-95 EXTERNAL 4-82 Pg 14-2 Portable One Dual Domain User's Manual...
  • Page 207 IBM GRAPH (printer setting) 4-85 Fuse selection 10-1 - 10-6 IEC wow-and-flutter standard 4-58 IEEE-488 Interface (GPIB) 3-13 GA (phase measurement) 4-51 IMD Function 4-53 - 4-54 Gain measurement 4-55 IMD tones, changing 4-54 Portable One Dual Domain User's Manual Pg 14-3...
  • Page 208 Options label 2-9 - 2-10 Loading, generator 4-18 - 4-19 Origin bits 4-21, 4-76 Lock flag 4-77 OUT BLOCK (delay reference) 4-72 Loss measurement 4-55 OUT FRAME (delay reference) 4-72 Low display 4-62 Pg 14-4 Portable One Dual Domain User's Manual...
  • Page 209 Power line monitoring 4-63 - 4-64 Repeating (continuous) sweeps 4-84 Power switch 2-3 Response, tape recorder 5-2 Power units 4-96 ppm unit 4-99, 7-1 s unit 4-97, 7-1 Pre-emphasis bit 4-20, 4-76 Safety information 2-4 - 2-5 Portable One Dual Domain User's Manual Pg 14-5...
  • Page 210 Transmission link testing 5-1 Supply voltage indicators 2-3 Trigger Outputs 3-9 - 3-10 Sweep cursors 4-84 Typical connections 2-11 - 2-13 SWEEP key 4-4, 4-81, 4-84 Sweep panel 4-4, 4-81 - 4-83 Pg 14-6 Portable One Dual Domain User's Manual...
  • Page 211 Word length 4-15, 4-72 Wow and Flutter Measurement 4-57 Write-protecting setups 4-90 WTD (weighted) 4-29, 4-38, 4-59 X/Y unit 4-93, 7-1 XMT CLOCK 3-10 XMT FRAME 3-10 XTALK Function 4-61 - 4-62 Portable One Dual Domain User's Manual Pg 14-7...
  • Page 212 NOTES: Pg 14-8 Portable One Dual Domain User's Manual...
  • Page 213 Audio Precision PO Box 2209 Beaverton, Oregon 97075-2209 Tel: (503) 627-0832 Fax: (503) 641-8906 US Toll Free: 1-800-231-7350 email: techsupport audioprecision.com Web: www.audioprecision.com...

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