Audio Precision has developed a complete LabVIEW project-style instrument driver for IEEE 488.2 (GPIB) equipped models of the 2700 Series of audio analyzers. This driver supports NI LabVIEW 8.20.
Example utilizing C# for AP2700 "using references" (Visual C# 2005).
A brief, two-page comparison of the APx555 and 2700 Series Audio Analyzers.
Compatible with 2700 Series, System Two Cascade, and System Two Cascade Plus.
Version 3.3 SP2 (and SP1) supports 64-bit Windows 7 using the APIB-USB adapter. The OPT-2711 (Dolby Digital generator option) is not supported. Instruments with OPT-2711 installed will function correctly on a 64-bit PC, but the Dolby Digital generator will not be available.
For Windows 8, please also download the AP2700 Windows 8 USB Drivers and follow the included instructions.
More detailed information is available on our AP Software and Windows Compatibility chart
Contains two triangle waves. Both are 24-bit with 16,384 samples and contain one cycle of a triangle wave. One has a frequency of 1.0 Hz and is sampled at 16.384 kHz. The other has a frequency of 2.926875 Hz and is sampled at 48 kHz. Designed to be loaded into the arbitrary waveform generator of the SYS-2722 analyzer.
2700 Series Full Specifications
AP specifications in hard copy booklets & brochures can be out of date. The specifications documents available for download from our Web site have the most current and correct information. If there is a conflict between printed and online specifications, the online version is the prevailing document.
Getting Started With Your 2700 Series Instrument
2700 Series User Manual
Performance Check for all System Two and 2700 Series instruments. Running the Performance Check verifies proper instrument operation, and provides diagnostic data for Technical Support evaluation before sending an instrument in for service.
This AP Basic macro reads or sets the 2700 series instrument EEPROM firmware configuration to indicate the currently installed pre-analyzer filter (S-AES17 or OPT-2020). If you install or remove pre-analyzer filter hardware, you must set the EEPROM configuration for correct software operation. Requires AP2700 or APWIN version 2.24 or later control software.
These files accompany the "AP Basic Scripting" training video found at http://ap.com/support/training
The Audio Precision Resources Disc contains Sample Tests, the Performance Check and documentation to help you operate your AP2700 or ATS control software compatible audio analyzer. AP2700 or ATS control software is required. The installer includes both AP2700 and ATS-2 resources. You will be prompted to choose which components you wish to install.
This measurement looks at the four segments of an envelope expressed as amplitude vs. time; Attack, time for a signal to reach full amplitude, Decay, time for the signal to drop from the initial attack level to the sustain level, Sustain, time the signal remains at the constant amplitude, and Release, time for the signal to return to an off or zero amplitude condition.
Illustrates setting up the sweep panel to return all FFT bins. For 2700 Series and ATS-2. The macro includes a function that gets the Sample Rate and FFT length, and in addition to setting up the sweep panel, it retrieves the FFT level spectrum in units of Volts.
Lets you set the graph trace properties quickly (line color, thickness, pattern, comments), even if you aren't otherwise using macros or automation, by adding this macro to your Quick Launch toolbar.
Zip file includes macros for AP2700 and ATS, and Quick Launch installation instructions.
The ATS-2 and 2700 Series GPIB implementation requires that waveforms loaded into the analog and digital Arbitrary waveform buffers be mono files. Many of the sample waveforms provided for the two instruments are Stereo.Â This download contains two macros, one for each instrument, that can be used to split the stereo waveform into mono files.
Installation of this file restores RS-232 control in AP Basic macros, where the original file has gotten corrupted or is not provided by the operating system (Windows Vista and 7). See the related KB article for installation instructions. When the file is corrupted or missing, the following error message appears:
"Communications control MScomm32.ocx could not be loaded."
This issue has been corrected in AP2700 v3.30 SP1. We recommend that you download and install SP1 or later instead of just replacing this file, as it addresses some other issues as well as adds a driver for 64-bit versions of Windows.
Series of macros written to support KB article http://ap.com/kb/87 on THD & IMD Measurements of Power Amplifiers with Short Duration Signals
Includes instructions and discussion.
File configured to measure crest factor. See knowledge base article for complete explanation.
Measures and graphs the damping factor and output impedance vs. frequency of a power amplifier.
Accompanies KB article "DIM 30 and DIM 100 Measurements per IEC 60268-3 with AP2700"
Accompanies KB article Open Loop Crosstalk vs. Frequency .
AP2700 macro and test file to accompany the KB article "FFT Scaling for Noise."
Contains several functions that are useful for performing calculations on FFT spectra, including FFT spectrum integration with window correction. There is also a subroutine that will convert a measured FFT spectrum to amplitude spectral density in dB relative to 1.0 V/âˆšHz, or FS/âˆšHz, and plot it on the graph.
This AP2700 test file accompanies the KB article "Syncing the 2700 Series Generator to an External Reference."
AP2700 test file to accompany the knowledge base article on Glitch Detection.
GraphBuilder is a macro that extends the two-dimensional graph capability built into AP2700 and ATS control software to include three dimensional and polar graphs. For use with APWIN, download the previous version (1.1).
This file accompanies the knowledge base article "I2S jitter measurement with the SYS-2722." It demonstrates how to measure digital interface jitter using the digital unbalanced input of the instrument.
This AP2700 macro interrogates the System Two Family analyzer and APIB bus, and displays a list of all attached instruments and options.
The Audio Precision Filter Design Package (APFDP) has been produced by Momentum Data Systems, Inc., to allow the user to create DSP filters for downloading to Audio Precision System Two Cascade hardware.
The manual below explains the operation of APFDP. It is not intended to be a tutorial on digital signal processing, since there are many excellent texts on the subject, and it is assumed that the user has had a certain amount of academic or professional exposure to the subject.
More advanced versions of this software are available, including versions enabling the design of finite impulse response (FIR) filters. These versions also support more powerful filter design techniques. Please call Momentum Data Systems for further information.
Zip file contains
APFDP manual (.pdf file)
APFDP Executable application (.exe file)
4 sample test tiles (.spc file)
Read me (.txt file)
Although the AP2700 Control Software does not include polar plotting, you can export measurement data to the plotting program of your choice.
This AP Basic macro demonstrates the use of a modified AP.Prompt for use in control loops. It allows the AP.Prompt text to be changed while a prompt is displayed without flashing or refreshing the entire prompt window.
Tests PSRR (power supply rejection ratio). See the associated KB article for instructions. Contains .at27 test and .ads sweep file.
Many devices contain internal clocks that are not accessible but that need to be measured. Examples include the A/D converters in USB headsets, and the D/A converters in MP3 players and smart phones. The internal sample rate error of these types of devices can be indirectly determined by measuring the frequency error of a known tone. This download contains two AP2700 macros that calculate the error. See the associated KB article for instructions.
Macro and test file demonstrate how to send a bar graph reading to an RS-232 serial port.
Set of MATLAB functions for audio applications such as reading and writing waveforms and filters for 2700, ATS-2, and APx
dd-Ins are additional software features that can be seamlessly integrated into the AP2700 user interface.
AP uses the standard Windows "Add/Remove Programs" exclusively to manage Add-Ins.
User Preferences -- Provides a user interface where you can set user preferences, define multiple preference groups and control how the preferences are applied to tests.
Document Test Settings -- Creates an ASCII text file that documents selected panel settings for the current test configuration.
Delete Traces-- Provides the capability to delete selected traces from the Graph / Data Editor. Sweeps that have any traces removed from view in the Graph are deleted.
Audio Precision's proprietary APIB interface bus requires the installation of the proper Windows driver software on your PC.
Drivers for running AP2700 and ATS software in Windows 7 and 8 using the AP USB-APIB Adapter. Includes instructions. See the KB article AP Software Windows Version Compatibility for more information.
Resolves an error with the MLS Quick Launch macro in AP2700 v3.3. When the MLS Quick Launch icon is clicked, and then the sweep Go button is clicked, the following message is displayed: "Error 18020: Channel 1 De-emphasis overload detected" Unzip this file, and save the two resulting files in the "My DocumentsAudio PrecisionAP2700 3.30Quick Launch" directory, replacing the ones currently there. This will fix the problem.