Transcript
© Nexus Technologies P/L, 2011
S:\Manuals\LAC\LAC_Instruction_Manual_01_081211.doc
Instruction Manual
Digital Audio Converter Model LAC
© Nexus Technologies P/L, 2011
Client: Status: Authorised by: Comment Closure Date: Version 1 2 3 4
Date 08 December 2011
S:\Manuals\LAC\LAC_Instruction_Manual_01_081211.doc
Document Status Nexus Controlled external release AFG 30 Aug 2011 Revision History Changes Initial Release
© Nexus Technologies P/L, 2011
S:\Manuals\LAC\LAC_Instruction_Manual_01_081211.doc
Table of Contents 1 1.1
2 2.1 2.2 2.3
3 3.1
4
INTRODUCING THE LAC ........................................................................... 4 Brief Overview ................................................................................................................. 4
CONNECTORS ........................................................................................... 4 Input Connectors ............................................................................................................. 4 Output connectors .......................................................................................................... 5 DIP Switch module .......................................................................................................... 5
OPERATION MODE .................................................................................... 6 Analog audio out: important note.................................................................................. 7
STARTUP GUIDE ....................................................................................... 7
APPENDIX A: SPECIFICATIONS ..................................................................... 8
Leaf Audio Converter User Manual
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1 Introducing the LAC 1.1 Brief Overview The Leaf LAC is a standalone electronic module built into a small metal enclosure. It is a digital audio converter and is designed to convert either optical or coax digital audio (S/PDIF) or analog stereo line level audio to coaxial digital audio (S/PDIF) and line level stereo analog audio. Various functions of the LAC are selected by a set of DIP switches accessible from the lower surface of the metal housing, and need to be set before use. The LAC is required to be connected to a 12 V DC source. It may be “daisy chained” off an existing 12 V (2.1mm connector) power supply feeding an existing Leaf device or may be connected to a standalone power supply. The current consumption of the LAC is such that a up to 12 of them may be daisy chained from a single power supply if co located.
2 Connectors 2.1 Input Connectors
The input connectors are located on one of the long sides of the enclosure and consist of: 2x 2.1mm concentric power connector receptacles, one for incoming 12V power feed, the other for optional power extend to other units. Special DC power extend leads for this purpose will be available from Leaf Audio. 1 x female Toslink receptacle for connection of optical digital audio. 1 x female RCA connector for connection of coaxial digital audio. 1 x pair of female RCA connectors for connection of analog stereo line level audio. The RCA connectors are color coded orange for digital audio, white and red for analog stereo audio.
Leaf Audio Converter User Manual
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2.2 Output connectors
The output connectors are located on the opposite long side of the enclosure and consist of: 1 x female RCA connector for connection of coaxial digital audio. 1 x pair or female RCA connectors for connection of analog stereo line level audio. The RCA connectors are color coded orange for digital audio, white and red for analog stereo audio.
3 DIP Switch module A DIP (Dual Inline Parallel) switch module with 8 switches is accessible from the bottom of the LAC. These must be set to the required mode (Ref sect 4) before the LAC unit is used. The DIP switch module is labeled with switches number 1 to 8, left to right, and ON is when a switch lever is moved to the uppermost position.
This picture shows the DIP switch module set with switches 1, 2, 3, 5, 7 & 8 set to ON and switches 4 and 6 OFF as required for Normal Mode 1, with 44.1kHz sample rate. (Ref sect 4).
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4 Operation mode The LAC can be set up in different operation modes by setting the DIP switches to the appropriate settings. Normal Mode 1 Coax S/PDIF (RCA) digital audio IN to stereo analog audio OUT and Stereo audio IN to coax S/PDIF (RCA) OUT
1 Note 1
DIP Switch Settings 2 3 4 5 6 7 8 ON ON OFF ON OFF ON ON
Note 1: A/D Sample rate ON=44.1kHz OFF=48kHz Normal Mode 2 Optical (Toslink) digital audio IN to stereo analog audio OUT and Stereo audio IN to coax S/PDIF (RCA) OUT DIP Switch Settings 1 2 3 4 5 6 7 8 Note 1 ON OFF OFF ON OFF ON ON Note 1: A/D Sample rate ON=44.1kHz OFF=48kHz
Digital Mode 1 Optical (Toslink) digital audio IN to coax S/PDIF (RCA) OUT and also to stereo analog audio OUT
1 ON
DIP Switch Settings 2 3 4 5 6 ON ON ON ON ON
7 8 ON ON
Digital Mode 2 Coax S/PDIF (RCA) digital audio IN to coax S/PDIF (RCA) OUT and also to stereo analog audio OUT
1 ON
Leaf Audio Converter User Manual
DIP Switch Settings 2 3 4 5 6 ON OFF ON ON ON
Model LAC
7 8 ON ON
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4.1 Analog audio out: important note The availability of stereo analog audio at these outputs is dependent on the digital audio input signal being of an S/PDIF compliant format from which 2 channel stereo analog audio can be decoded. Not all digital audio formats support this function. A suggested starting point is PCM 44.1Khz.
5
Startup Guide
The following steps are required to configure the LAC for use: Set the relevant DIP switches for the type of signal inputs and outputs that are to be connected. Connect the signal sources to the relevant input receptacle(s). Connect the signal output to the relevant output receptacle(s). Connect 12V DC power supply. The LAC is now ready for use.
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Appendix A: Specifications Parameter
Specification
Inputs
S/PDIF (Coaxial Digital Audio) RCA Toslink (Optical Digital Audio) Stereo line level Audio RCA
Outputs
S/PDIF (Coaxial Digital Audio) RCA Stereo line level Audio RCA
Supported audio formats
Stereo Multichannel supported in digital mode through S/PDIF output only. Not all multichannel formats guaranteed.
Signal to noise ratio ( Inputs)
97dB (A-weighted @ 48kHz)
Signal to noise ratio ( Outputs)
98dB (A-weighted @ 48kHz)
Channel Separation ( Outputs)
100dB
Power
12V DC @ ~1 Watt. Actual power consumption depends on the mode used.
Power Connectors
2 x 2.1mm concentric receptacles Either can be used for DC power in, the other may be used to extend DC power to other units with the use of a special DC power lead.
Mounting Dimensions (W x D x H) Weight
Free standing 91 x 56 x 31mm & connectors ~ 75gm (unit only)
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