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Summary of Contents for Audio Precision Portable One Plus Access
- Page 1 (217) 352-9330 | Click HERE Find the Audio Precision Portable One Plus Access at our website:...
- Page 2 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 3 Portable One Plus Access User’s Manual Version 2 June 2001 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 4 Audio Precision Portable One Plus Access User’s Manual Copyright © 1998, 2001 by 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.
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Page 5: Table Of Contents
Introduction to this Manual ......ix Introducing the Portable One Plus Access ....1-1 Getting Started . - Page 6 Printing Saved Data ......4-70 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 7 Appendix G - Specifications ......13-1 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 8 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 9: 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 10 Confirm that this terminal is connected to an external protective earthing system. viii Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 11: Introduction To This Manual
The fifth chapter is about applying the Portable One Plus Access 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 12 Introduction to this Manual Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 13: Introducing The Portable One Plus Access
Introducing the Portable One Plus Access Figure 1-1. Portable One Plus Access The Audio Precision Portable One Plus Access is a comprehensive two-channel analog audio test instrument. It features the following measurement functions: Level (two channels simultaneously) Noise or signal-to-noise ratio (wideband, weighted, or selective) - Page 14 Introducing the Portable One Plus Access The Portable One Plus Access 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 15 All measurements, settings, and graphs are displayed on a sharp, clear, backlighted liquid crystal display. The Portable One Plus Access can be purchased with or without the ‘P1-IMD’ option, which allows generation and analysis of Intermodulation Distortion test signals.
- Page 16 Introducing the Portable One Plus Access NOTES: Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 17: Getting Started
Notice that on the inside of the cover are simplified operation instructions for use as a quick reminder of common feature usage. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 18 Tilt Bail Figure 2-2. Tilt Bail Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 19: 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 Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 20: Front Panel Overview
FUNCTION KEYS - These keys select the measurement to be page 4-62. performed by the analyzer. & FUNCTION KEYS - page 4-17. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 21 Inputs - page 3-2. ANALYZER INPUTS - These XLR jacks provide signal inputs to the analyzer from the device-under-test. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 22: Rear Panel Overview
& Options Label - OPTIONS LABEL - This label provides details about the page 2-8. optional accessories installed in the Portable One Plus Access. & GPIB Connector - GPIB CONNECTOR - This connector allows the unit to be page 3-8. - Page 23 Power - page 2-3. POWER SWITCH - This switch turns the main power supply to the Portable One Plus Access on (1) and off (0). Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 24: Options Label
Getting Started Options Label Options Label The Options Label specifies any options that are installed in your Portable One Plus Access. It is located in the bottom right corner of the rear panel. PORTABLE ONE PLUS Audio Measurement System IMD Option Installed... -
Page 25: Typical Connections
Left Channel Analog Input Right Channel Analog Output Right Channel Analog Input DEVICE UNDER TEST Figure 2-7. Typical Connections to Device-Under-Test Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 26 Getting Started Typical Connections NOTES: 2-10 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 27: External Connections
XLR connections are almost always balanced, although sometimes the XLR connector can be used in balanced or unbalanced configurations, as in the Portable One Plus Access. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 28: Analyzer Inputs And Generator 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 Plus Access should have XLR connectors on one end & For a detailed for connection to the test instrument. The other end of the cables must technical diagram of have a connector appropriate for the device-under-test. - Page 29 600 Ω terminations. Check your device’s output specifications to see if a termination of 600 Ω is required. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 30 Check the input specifications for your device. For devices with higher input impedances, choose 40 Ω. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 31: Trigger Output
It is intended primarily to provide a stable trigger for oscilloscope displays of the monitor signals. The source impedance for this signal is 680 Ω. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 32: Monitor Outputs
Each block diagram shows the points in the signal path from 4-17 to 4-62 . which the monitors are taken. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 33: Printer Port
External Connections Printer Port The Portable One Plus Access 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 34: Gpib Interface
External Connections GPIB Interface GPIB Interface The Portable One Plus Access 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 35: Overview
The INSTRUMENT MODE keys select major instrument operational and display modes. The display can show any one of seven different panels, selectable by these keys. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 36 Panel, even if the measurement function does not change. SETUP PANEL GPIB PANEL (IF P1DD-488 OPTION INSTALLED) Figure 4-2. Navigating the Panels Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 37 This bargraph shows a real-time analog-like display of a selected reading. See page 4-57 for more discussion of the Bargraph panel. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 38 For more information on printing and the Print panel, see page 4-63. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 39: Recall/Save Key
The FUNCTION keys and measurement functions are discussed in detail in the section on Controlling the Analyzer. See page 4-15. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 40: Input Keys
0.04%. One full rotation will change the frequency by about 15%. This may be different for other parameters. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 41: Amplitude Controls
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 Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 42: Dbr Zero Key
MONITOR Operation on Units, page The Portable One Plus Access 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 43 INC FREQUENCY and AMPLITUDE INC and DEC keys. and DEC controls, see pages 4-6 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 44: Screen Saver
For situations where the two hour time period is insufficient, the Portable One Plus Access 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 45: Controlling The Generator
Controlling the Generator Generator Overview The Portable One Plus Access 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. It can also generate square waves from 20 Hz to 30 kHz with amplitudes from zero to around 34.4 Vpp... -
Page 46: Generator Controls
Generator Only panel. Waveform shapes of sine, square, and IMD (if IMD option is installed) are available with subsequent presses of the soft key. 4-12 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 47: Generator Loading
0.1 dB. For a 100 kΩ load, typical of many professional audio devices, the 40 Ω source impedance will cause an error of about 0.05 dB. Portable One Plus Access User's Manual 4-13 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 48 The impedance reference used in dBm calculations can be selected on the Analyzer Only panel when dBm units are selected. 4-14 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 49: Controlling The Analyzer
Operation Controlling the Analyzer Analyzer Overview The Portable One Plus Access analyzer is generally configured for only one type of measurement at a time. The type of measurement currently being displayed is determined by the current measurement function. Often a single measurement function will provide measurement of several related parameters. -
Page 50: Input Selection Buttons
Pressing GEN a second time will connect both inputs to the internal gen-mon paths. 4-16 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 51: Function Keys
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. Portable One Plus Access User's Manual 4-17 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 52: Amplitude
4-71. SELECTIVE filter is chosen. 4-18 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 53 CCIR-2k – Weighting per CCIR-468, but with 0 dB gain 4-59. point at 2 kHz rather that 1 kHz, true RMS detector CCIR-QPK – Weighting per CCIR-468, quasi-peak detector Portable One Plus Access User's Manual 4-19 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 54 2. If there is no filter in slot 2, the display will read ‘NO AUX2’ and no filter is selected. 4-20 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 55: Noise
In addition to the units listed for the Amplitude function, the top left soft key can be used to select the ‘dB’ unit. If this unit is selected, a Portable One Plus Access User's Manual 4-21 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 56 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. 4-22 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 57: Level
The INPUT A and INPUT B keys select the input for the primary measurement. The opposite channel is automatically selected for the secondary measurement. The GEN key will select the internal Portable One Plus Access User's Manual 4-23 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 58 B. The Level function provides the best amplitude accuracy of which the Portable One Plus Access is capable, as long as the measured signal is above about 10 mV. The Amplitude function provides wider dynamic range, but at reduced accuracy.
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Page 59: Thd+N (Total Harmonic Distortion Plus Noise)
FILTERS CHANNEL B INPUT AVERAGING TERMINATION FREQUENCY COUNTER SECONDARY READING LCD DISPLAY DETECTOR Figure 4-19. Block Diagram of THD+N Measurement Portable One Plus Access User's Manual 4-25 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 60 If the signal amplitude is too low, tuning operation will cease and the display will read ‘Low’. The THD must also be less than about 10% THD+N. 4-26 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 61 This is used to reduce digit bobble, especially when testing distortion in the presence of noise and flutter from analog tape recorders. Portable One Plus Access User's Manual 4-27 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 62 In addition, the voltmeter used to measure the signal before filtering has limited dynamic range, so accuracy suffers when measuring signals with a fundamental tone below about 10 mV. 4-28 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 63 ‘Isolating Sources of THD+N’ on page 4-37. Portable One Plus Access User's Manual 4-29 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 64 4-30 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 65: 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 Plus Access User's Manual 4-31 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 66 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. 4-32 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 67 THD for these distortion products. The contribution of the remaining noise (between 400 Hz and 22 kHz) is negligible. Portable One Plus Access User's Manual 4-33 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 68: Changes With Frequency
In this case, the low THD+N reading is incorrect. 4-34 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 69: Changes With Amplitude
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 Plus Access User's Manual 4-35 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 70: Thd+N At 100% (Or 0 Db)
GEN-TRACK will give 100% readings if the frequency of the incoming fundamental tone is different from the generator frequency. 4-36 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 71: Isolating Sources Of Thd+N
It may slope gently in one direction or the other, usually upward with increasing frequency. Portable One Plus Access User's Manual 4-37 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 72: Sinad
The amplitude units may be amplitude units, see page 4-71. selected by pressing the top center soft key. 4-38 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 73 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 Plus Access User's Manual 4-39 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 74: Phase
Pressing the upper center soft key will select among the available units. amplitude units, see The usual absolute and relative amplitude units are available. page 4-71. 4-40 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 75 20 mV and must have signal-to-noise ratio greater than about 40 dB. If either input drops below about 8 mV (or below Portable One Plus Access User's Manual 4-41 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 76 If the S/N ratio in either channel is 4-58. less than 40 dB, the reading may be unstable, especially at low frequencies. 4-42 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 77: Imd
The IMD measurement function is selected by pressing the FUNCTION IMD button. It is only available if the Intermodulation Distortion Option is installed. The Portable One Plus Access can be purchased with or without this option, or the option can be added at a later time. - Page 78 60 Hz. Under the DIN standard, a 250 Hz lower tone with an 8 kHz upper tone is a better choice. 4-44 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 79: Ratio
X/Y. The dB selection will compute the amplitude of the selected channel relative to the reference channel. The X/Y selection Portable One Plus Access User's Manual 4-45 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 80 If the restricted meter reads below 8 mV, the display will read ‘Low’. A table summarizing this information is shown on the following page. 4-46 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 81 B Input, >8mV Either Mode Channel Balance B Input, >8mV A Input, >8mV Either Mode >8mV >8mV Either Mode <8mV <8mV Invalid Portable One Plus Access User's Manual 4-47 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 82: W+F (Wow And Flutter)
The reference tone is usually pre-recorded on a device with minimal wow and flutter. The output is then sent to the Portable One Plus Access for analysis. The instrument determines the amount of speed fluctuation and the amount of speed error. - Page 83 1/3 second interval. Selecting 2σ will give the maximum value exceeded no more than 5% of the time (the second-highest reading of a 20-reading group). Portable One Plus Access User's Manual 4-49 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 84 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. 4-50 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 85: Xtalk (Crosstalk)
The alternate channel is the driven channel, and its amplitude is measured for comparison to the non-driven Portable One Plus Access User's Manual 4-51 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 86 If it is not, both the XTALK reading and the frequency reading will read ‘Low’. No fixed filters are available. 4-52 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 87: Ac Mains (Power Line Monitor)
The only available units are percent. The upper center soft key can be used to turn the measurement off. Portable One Plus Access User's Manual 4-53 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 88 In AC Mains mode, the Main Panel also provides access to the Self Test. See Appendix F for more detail on the Self Test. 4-54 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 89: Gen Load
The only available unit is Hz, but the upper right soft key can be used to turn the reading off. Portable One Plus Access User's Manual 4-55 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 90 If the impedance curve shows very sharp peaks or dips, one should suspect that the load is very reactive. 4-56 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 91: Bargraphs
AMPLITUDE controls adjust the value. The step size of the INC/DEC and ±10dB buttons depends on the measurement function selected. Portable One Plus Access User's Manual 4-57 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 92 The Portable One Plus Access remembers separate units for each numerical display and the bargraph for each measurement function. 4-58 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 93: Sweeps
To change it, press the top left soft key to highlight it, then use the AMPLITUDE controls to adjust the value. Portable One Plus Access User's Manual 4-59 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 94 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 Plus Access generator does not perform the stimulus changes – they come directly from the device-under-test, usually from a test tape or CD.
- Page 95 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 Plus Access generator feeding an audio transmission link while the analyzer section of another Portable makes EXTERNAL sweep measurements at the receiving end.
- Page 96 Only this data will be saved and recalled. 4-62 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 97: External Sweeps
Printing The Portable One Plus Access has the ability to print directly to a printer connected to the external printer port located on the rear panel of the instrument. - Page 98 (or ‘screen dump’) of the current display. For example, the following figure shows a printout from the Setup Panel: Figure 4-41. Screen Dump of Setup Panel 4-64 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 99 Panel with the normal menu items. Following are examples of the three types of printouts: Figure 4-43. High-Resolution Graph Printout Portable One Plus Access User's Manual 4-65 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 100 No matter what PRINT mode is chosen, the display colors will invert while the Portable One Plus Access 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 101 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 Plus Access User's Manual 4-67 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 102: Saving And Recalling Setups
Controlling the Analyzer : Saving and Recalling Setups Saving and Recalling Setups The Portable One Plus Access 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 103 AMPLITUDE or FREQUENCY knob. Using the +10 dB, -10 dB, x10, and ÷10 keys will change the character by steps of 16. Portable One Plus Access User's Manual 4-69 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 104: 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 4-63. 4-70 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 105: Units
Units : Amplitude units Operation Units The Portable One Plus Access supports a full set of industry-standard units. & For a Quick Amplitude units Reference to Units, see V (Volts) – Basic unit of amplitude Appendix A. Vp – Peak voltage dB –... - Page 106 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. 4-72 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 107 Those old meters calibrated in dBm are actually dBu meters. (continued on following page) Portable One Plus Access User's Manual 4-73 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 108: Power Units
600 Ω equipment, you can use dBm units. You can easily measure the about the Gen Load function, input impedance of a device using the Portable One Plus Access’s Gen see page 4-55. Load function. If you are testing equipment terminated in high impedances, or if you are... -
Page 109: 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 Plus Access User's Manual 4-75 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 110: Phase Units
However, the scale may be shifted to span any 360-degree area, generally between –360 degrees and +360 degrees. 4-76 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 111: Applications
Portable One Plus Access units at both ends of the link, or a compatible sweeping generator at the “send” end and a Portable One Plus Access at the “receive” end. At the “send” end, set the generator to the desired amplitude and select SWEEP mode. -
Page 112: Analog Tape Recorder Alignment And Performance Verification
If dBr units are used, the mid-frequency (usually 1 kHz) Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 113: 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 Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 114 For k3 (third harmonic) distortion measurements such as when measuring MOL (maximum output level), install an optional bandpass Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 115: Compact Disc Players
Many test discs have a sweep of about 50 seconds duration across the audio band which is suitable for Portable One Plus Access. 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 116 Applications Compact Disc Players NOTES: Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 117: Detailed Technical Diagrams
Detailed Technical Diagrams This chapter contains several diagrams to assist your understanding of how the Portable One Plus Access 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 118 GENERATOR MAIN OUTPUTS OSCILLATOR BALANCING TRANSFORMER OUTPUT SQUARE AMPLIFIER SOURCE WAVE IMPEDANCE GENERATOR CHANNEL BACK TERMINATION Figure 6-1. Instrument Block Diagram Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 119 An internal jumper may be changed to move the pickoff point to the end of the principal meter, following all filtering. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 120: Generator Output Circuit
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. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 121 Generator Output Circuit Detailed Technical Diagrams Figure 6-2. Simplified Analog Generator Output Circuit Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 122: Analyzer Input Circuit
Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 123 Analyzer Input Circuit Detailed Technical Diagrams Figure 6-3. Simplified Analog Analyzer Input Circuit Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 124: Cable Diagrams
Detailed Technical Diagrams Cable Diagrams Cable Diagrams Connecting the Portable One Plus Access to a device-under-test may require construction of special cables. This section describes proper wiring of cable connections and gives examples of cables for common connector applications. In some cases, adapters may be used to adapt one connector type to another, but the electrical connections should follow the examples shown in this section. -
Page 125: Unbalanced Connections
XLR Male 2 Conductor shielded cable BNC Connector or Female Shield not connected this end Figure 6-5. Preferred Unbalanced Cable Connections Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 126 Female Sleeve Single Conductor shielded cable XLR Male BNC Connector or Female Figure 6-6. Unbalanced Connections Using Single-Conductor Cable 6-10 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 127: Unbalanced Stereo Connections
Single conductor shielded cable or Female Left Channel Stereo Plug Sleeve Ring Right Channel Figure 6-7. Stereo Unbalanced Cable Connections Portable One Plus Access User's Manual 6-11 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 128 Detailed Technical Diagrams Cable Diagrams NOTES: 6-12 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 129: Appendix A - Units Quick Reference
Volts; Basic unit of amplitude Amplitude Peak Voltage Power Watts; Basic unit of power Amplitude Pure number resulting from division of two numbers Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 130 Appendix A - Units Quick Reference NOTES: Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 131: Appendix B - Option Filter Installation
Appendix B - Option Filter Installation Optional filters can be purchased with the Portable One Plus Access, 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 132 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. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 133 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 Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 134 For more information on the AMPL function, see page 4-18. For more information on sweeping, see page 4-59. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 135: Appendix C - Monitor Source Selection
Appendix C - Monitor Source Selection The Portable One Plus Access 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 136 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. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 137 8. 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 Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 138 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. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 139: Appendix D - Line Voltage And Fuse Selection
Appendix D - Line Voltage and Fuse Selection The Portable One Plus Access 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. This appendix describes the procedure for changing the voltage setting, which may be necessary under some circumstances. -
Page 140: 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. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 141: Checking The Fuse Block Orientation
Checking the Fuses (page 10-5). If not, continue with the next section, “Changing the Fuse Block Orientation.” Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 142: Changing The Fuse Block Orientation
Cover. Tighten the screw. Figure 10-5 shows the two fuse block orientations. 4. Check the fuses as instructed in the next section. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... -
Page 143: Checking The Fuses
(see Figure 10-1 for location of indicator holes). Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 144 Appendix D - Line Voltage and Fuse Selection Checking the Fuses NOTES: Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 145: Appendix E - Filter Shapes
Shapes of Bandwidth Limiting Filters - 22 Hz Highpass, 400 Hz Highpass, 22 kHz Lowpass, 30 kHz Lowpass, 80 kHz Lowpass. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 146 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. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 147: Appendix F - Self Test
Appendix F - Self Test The Portable One Plus Access 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 148 Appendix F - Self Test The upper right corner of the display shows the current firmware version. This is the version of the internal program that runs the Portable One Plus Access, and applies to all features, not just the self test. ATTENTION! Always disconnect all cables from the generator outputs before running the self test.
- Page 149 Following is a sample printer output from a self test. Audio Precision Portable One Plus Access Self Test Version 3.00 Test Number and Description, Low Limit,Measured, High Limit, P/F TEST 1.0 100 Hz FREQUENCY 99.500 Hz 99.938 Hz 100.50 Hz...
- Page 150 22-22 kHz FILTER -6.00 dB -4.41 dB 0.00 dB PASS TEST 4.7 SELECTIVE FILTER -0.50 dB 0.01 dB 0.50 dB PASS Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 151 20 kHz PHASE -2.0 deg -0.2 PASS TEST 9.0 WOW AND FLUTTER 0.950 % 1.002 % 1.050 % PASS Passed Self Test Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 152 Appendix F - Self Test NOTES: Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 153: Appendix G - Specifications
Vpp amplitude. Note 2 System specification including contributions from both generator and analyzer. Generator load must be ≥ 600 Ω. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com... - Page 154 System specification including contributions from both generator and analyzer. Generator load must be ≥ 600 Ω. 200 Ω with option “EURZ”. Note 3 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 155 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 Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 156 Bandpass Amplitude Function Tuning Range (f 20 Hz to 120 kHz Note 4 Combined with 22 Hz highpass per CCIR Rec 468. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 157 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 Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 158 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. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 159 Unweighted 0.01% Minimum Input 25 mV Settling Time IEC/DIN or NAB Typically 3 to 6 seconds Typically 15 to 20 seconds Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 160 Amplitude is typically 0 to 2.83 Vpp. AUDIO MONITOR Power Output Typically 1 Watt Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 161 EMC compliance was evaluated using Audio Precision XLR type cables, part number CAB-AES. Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 162 Appendix G - Specifications NOTES: G-10 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 163 Analyzer inputs 3-2 - 3-4 Checking fuses 10-5 Circuit diagram 6-6 - 6-7 Checking supply voltage setting 2-3 Termination 3-3 Portable One Plus Access User's Manual Index-1 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 164 Balanced/unbalanced configuration 3-4 Configuration 3-3 EGZ option 2-8 Controlling 4-11 - 4-14 End-to-end testing 5-1 Load measurement 4-55 - 4-56 Index-2 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 165 Options label 2-6, 2-8 Output circuit, generator 6-4 - 6-5 Output configuration 4-13 JIS wow-and-flutter standard 4-48 OUTPUT Keys 4-6 Outputs Portable One Plus Access User's Manual Index-3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 166 Sweeping 4-59 - 4-62 Rear panel overview 2-6 - 2-7 Symbols available for setup names 4-70 RECALL/SAVE Key 4-5, 4-68 Index-4 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 167 V (Volts) unit 4-71, 7-1 Voice announcements reference tape 5-2 Voltage gain or loss measurement 4-45 Vp unit 4-71, 7-1 Portable One Plus Access User's Manual Index-5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
- Page 168 Index-6 Portable One Plus Access User's Manual Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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