Hints for Measurement of Performance

Chapter 4

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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Texas Instruments SLEU056 manual Hints for Measurement of Performance

Contents

User’s Guide Products Applications Important Notice EVM Important Notice EVM Warnings and Restrictions About This Manual Read This First Part Number Literature Number Related Documentation From Texas Instruments Contents Tables Figures Introduction TAS5010−5112F2EVM FeaturesTopic −1. Simplified TAS5010−5112F2EVM Block Diagram TAS5010−5112F2EVM Features TAS5010−5112F2EVM Features Page Topic Detailed Description of the EVM Mute Board Overview Enable/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 J101 Analog Output Connector J170 Pin No Description Analog Input Connector J160Pin No Pin Description Net Name on Schematic PC and I2C Interface J300 Power Supply Connector Loudspeaker Connectors J540, J541, J580, and J581Pin No Description Net Name at Schematic Reference Designator Description Description of Switches and Buttons Power LED LED223 Description of IndicatorsTemperature Warning LED LED221 Protection Mode LED LED220 EVM Board Operation Power the EVM by One Power Supply Power SupplyPower the EVM With Two Power Supplies Load = 6 Ω Equalizer Enable Setup the TAS5010−5112F2EVM With the S/PDIF Input Interfacing the Analog Line Output Setup the TAS5010−5112F2EVM With the Analog Line InputControlling the DAP With PC Software Start-up Sequence Hints for Measurement of Performance