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Summary of Contents for Lavry DA2002
- Page 1 Model DA2002 High Resolution Digital to Analog Converter Operations Manual...
- Page 2 Lavry Engineering, Inc. P.O. Box 4602 Rolling Bay, WA 98601 360-598-9757 http://www.lavryengineering.com E-Mail:techsupport@lavryengineering.com Revision 1.7C December 7, 2011...
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Page 3: Introduction
The no-compromise approach of designer Dan Lavry to the architecture of the DA2002 resulted in a unique design, with unparalleled accuracy. As a classically trained musician, he brings more than decades of engineering experience to his designs;... -
Page 4: Overview
Overview Overview The DA2002 converts incoming 24 bit digital inputs to analog audio signals. The combination of excellent linearity, small quantization steps, fast and accurate response and low noise performance enables reproduction of the finest details. The DA2002 accommodates standard sample rates of 44.1, 48, 88.2, &... -
Page 5: Table Of Contents
DA2002 Table of Contents Table of Contents Introduction Overview PART I- Operating Instructions Input Signal Selection Input Signal Connection Analog Outputs Analog Output Level Turn-On Sequence Polarity Inversion PLL Mode and CrystalLock™ Mode Power and Fusing Maintenance Part II- Theory of Operation... - Page 6 DA2002 Table of Contents...
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Page 7: Part I- Operating Instructions
DA2002 Operation PART I: Operating Instructions Operation of the Model DA2002 Digital to Analog Converter requires the use of two push button switches located on the front panel: POLARITY inverts the absolute polarity of the signal. INPUT SELECT controls selection of digital inputs to the DAC. -
Page 8: Analog Outputs
DA2002 Operation Analog Outputs The LEFT OUTPUT and RIGHT OUTPUT XLR signals are factory set to provide Balanced analog signals (signal between pin 2 and pin 3 of the XLR connectors). Operation in unbalanced mode (signal at pin 2 and ground at pin 3) is possible by changing the internal jumpers J8 and J10 located behind the XLR analog output connectors inside the case. -
Page 9: Turn-On Sequence
Most DAC’s contains relays for the purpose of muting the output during turn on (allowing the DAC to settle to proper operating conditions). The DA2002 contains no relays, in order to avoid signal degradation associated with relay contacts. The unit minimizes “turn-on spikes” by incorporating very slow tracking power supplies for its output stage, thus disabling the drive capability during turn on. -
Page 10: Pll Mode And Crystallock™ Mode
The DA2002 features a very low jitter PLL Mode that prevents jitter in the input digital audio signal from degrading DA conversion quality. The PLL mode is recommended for operation of the DA2002 with inputs of 88.2 or 96 kHz. The default setting is PLL mode and is indicated by the Sample Frequency indicator slowly blinking. -
Page 11: Part Ii- Theory Of Operation
DA2002 Theory of Operation Part II: Theory of Operation The simplified block diagram (figure 1) shows the basic building blocks. Oven Control The PCM DAC is constructed of custom made laser trimmed thin film resistor networks; yet any resistor is subject to short term drift due to temperature variations and long term drift due to component aging. -
Page 12: Timing And Deglitcher
Calibrating a DA2002 for the first time (at the factory) often exceeds 25 minutes. Once calibrated, the settings are stored in non volatile ram for future startup point of reference, thus all future adjustments are initialized to the last settings. -
Page 13: Jitter Removal
While some of the jitter content is random, much is due to coupling of the data itself into the receiver circuitry. The DA2002 uses a two stage PLL circuit; the first one is based on a tuned circuit approach, and the second utilizes a narrow lock-range. The combination of the two provides enhanced jitter removal. -
Page 14: Specifications
DA2002 Specifications Part III: Specifications Noise -110dBFS rms, -130dBFS peak spurious response Distortion 1kHz tone at -1dBFS: .0009%FS peak harmonic amplitude 1kHz tone at -60dBFS: .00009%FS peak harmonic amplitude 10kHz tone at -1dBFS: .0009%FS peak harmonic amplitude 10kHz tone at -60dBFS: .00009%FS peak harmonic amplitude Sample rate 96kHx, 88.1kHz, 48kHz, 44.1kHz at +/- 150ppm lock... -
Page 15: Limited Warranty
Subject to the conditions set forth below, for one year after the original purchase date of the product, Lavry Engineering will repair the product free of charge in the United States in the event of a defect in materials or workmanship.