Texas Instruments SLEU056 manual Hints for Measurement of Performance

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Chapter 4

Hints for Measurement of Performance

Read the Digital Audio Measurements application note (SLAA114) for an introduction to measurements on true digital audio amplifiers.

You are welcome to use the audio precision test files available on the PurePath Digital™ amplifier CD-ROM. Note that an AES17 filter is required to reach the shown measurements. Specifications for the AES17 filter are described in the AES Standard Method For Digital Audio Engineering – Measurement of Digital Audio Equipment (the AES17 standard is available from the Audio Engineering Society – www.aes.org).

When evaluating the performance of the digital amplifier section, bypass the digital audio processor with S320 or adjust all settings to neutral and attenuation to 0 dB.

Connect the TAS5010−5112F2EVM to a regulated power supply with a short cable. The length of the PSU cable must not exceed 0,3 meters.

Hints for Measurement of Performance

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Contents User’s Guide Products Applications Important NoticeEVM Important Notice EVM Warnings and Restrictions About This Manual Read This FirstPart Number Literature Number Related Documentation From Texas InstrumentsContents Tables FiguresIntroduction TAS5010−5112F2EVM FeaturesTopic −1. Simplified TAS5010−5112F2EVM Block Diagram TAS5010−5112F2EVM FeaturesTAS5010−5112F2EVM Features Page Topic Detailed Description of the EVMMute Board OverviewEnable/Disable S/PDIF−MUTE JMP130 Description of Jumper SettingsDouble-Speed Control JMP120 Description of Connectors Default Jumper Positioins1 S/PDIF Digital Audio Coaxial/RCA Input J100 2 S/PDIF Optical J101Analog Output Connector J170 Pin No Description Analog Input Connector J160Pin No Pin Description Net Name on Schematic PC and I2C Interface J300Power Supply Connector Loudspeaker Connectors J540, J541, J580, and J581Pin No Description Net Name at Schematic Reference Designator DescriptionDescription of Switches and Buttons Power LED LED223 Description of IndicatorsTemperature Warning LED LED221 Protection Mode LED LED220EVM Board Operation Power the EVM by One Power Supply Power SupplyPower the EVM With Two Power Supplies Load = 6 ΩEqualizer Enable Setup the TAS5010−5112F2EVM With the S/PDIF InputInterfacing the Analog Line Output Setup the TAS5010−5112F2EVM With the Analog Line InputControlling the DAP With PC Software Start-up SequenceHints for Measurement of Performance