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Audio Precision has developed a LabVIEW project-style instrument driver for IEEE 488.2 (GPIB) equipped Portable One or ATS-1 audio analyzers. The LabVIEW VIs were developed using LabVIEW v5.1, but will open under LabVIEW versions through v8.21.
If you are using a later version of LabVIEW, visit National Instrument's knowledge base at http://zone.ni.com/devzone/cda/tut/p/id/8387 for information on migrating older LabVIEW VIs up to current versions.
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P1 / Portable One datasheet
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Visual Basic programs using AP's proprietary GPIB communication commands and responses to provide examples for several functions. For both ATS-1 and Portable One. Includes ATS-1/P1 GPIB manuals.
This Technote gives an overview of the concept of return loss in telephony. Return loss is an expression of the impedance mismatch in a transmission circuit which can give rise to reflection of signal energy. Sample hybrid circuits and their use in return loss measurements using Audio Precision instruments are described.
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ATS-1 Dual Domain User Manual
HPIB is an interface protocol used with older Hewlett-Packard instruments. These programs demonstrate the ATS-1 capability to operate in HPIB emulation mode.
Characterizing professional and consumer audio equipment requires techniques which often differ from those used to characterize other types of equipment. Sometimes this is due to the higher performance requirements. Other times it is due to the peculiarities of the audio industry. Other fields deal with some of the same measurements as those in audio. From level and THD to jitter and noise modulation, no other field has the breadth of requirements found in high performance audio.
This reference handbook is a practical, hands-on guide for workers in all phases of the audio field. It covers basic tools and techniques, common environments for audio testing, application of these techniques to common audio devices, the typical ranges of performance to expect in different devices, and a glossary of terms and key specifications used in audio measurement. 178 pages Written by Bob Metzler.
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