Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for Lavry DA924
Summary of Contents for Lavry DA924
- Page 1 LAVRY ENGINEERING Model DA924 High Resolution Digital to Analog Converter Operations Manual Lavry Engineering, Inc 824 Post Avenue Seattle, WA 98104 (206) 381-5891 http://www.lavryengineering.com/ E-Mail: info@lavryengineering.com Revision 1.1 March 1998...
-
Page 2: 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. -
Page 3: Table Of Contents
Operations Manual DA924 T a b l e o f C o n t e n t s Limited Warranty....................2 Introduction ......................4 PART I Operating Instructions..................5 Input signal selection..................... 5 Input signal connection ..................5 Analog Outputs...................... 6 Analog Output Level Adjustment.............. -
Page 4: Introduction
A quad switch deglitcher circuit removes the unwanted transition glitch energy. The DA924 eliminates jitter in the incoming data stream by use of a DSP controlled pullable crystal oscillator and a short buffer memory for temporary storage of the incoming data. -
Page 5: Operating Instructions
INPUT SELECT push button moves to the next input position. Holding the INPUT SELECT button for more then a second makes the DA924 go into search mode: the unit will step through the inputs but will skip the inactive input connectors (where no signal is present). -
Page 6: Analog Outputs
DA924 Operations Manual 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 7: Polarity Inversion
The DA924 turn on spike may be higher then that found in other DACs but the sound is not compromised. The spike due to power off is comparable to that found in other DACs. - Page 8 Operations Manual using varispeed, thus its use should be restricted for sample rates outside of the narrow lock range. Some multi-channel uses of the DA924 may require varispeed for synchronization. To enable wide lock, press and hold the POLARITY button for 1.5 seconds. To return to CrystalLock™, press and hold the POLARITY button again.
-
Page 9: Theory Of Operation
Operations Manual DA924 P a r t I I : T h e o r y of o p e r a t i o n 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;... -
Page 10: Timing And Deglitcher
Calibrating a DA924 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 11: Output Filter And Drivers
600 Ohms (at the destination, not at the DA924 side) may prove useful . Power and Fusing The Model DA924 operates at 50 or 60 Hz, and has two line voltage selections, 115 volts and 220 volts, switchable on the back panel. 115 volts operation requires a 1/2 ampere 250 volt fast blow fuse;... - Page 12 DA924 Operations Manual The front panel is gold plated (24 karat gold). Use a soft cloth (and plain water, if necessary) to clean finger prints.
-
Page 13: Part Iii Specifications
Operations Manual DA924 P a r t I I I : S p e c i f i c a t i o n s 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...