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Linear Acoustic LA-5269 Transcoder User Guide

Applications

22

Summary of Contents for LA-5269

Page 1: ...Dolby Digital Plus Transcoder Model LA 5269 User Guide...

Page 2: ......

Page 3: ...Dolby Digital Plus Transcoder Model LA 5269 User Guide Release Date March 2011 Software Version V0 0 15 and later Linear Acoustic Inc Phone 717 735 3611 FAX 717 735 3612 Web www LinearAcoustic com...

Page 4: ...NIT IN ORIGINAL SHIPPING CARTON AND PACKING MATERIALS WILL RESULT IN A CHARGE FOR NEW SHIPPING MATERIALS LIMITATION OF PERIOD OF ACTION ON CONTRACT No action regardless of form arising out of the tran...

Page 5: ...Linear Acoustic LA 5269 Transcoder User Guide v List of Figures 1 1 Audio Block Diagram 6 2 1 Rear Panel 10 3 1 LA 5269 Connection Example 13 3 2 A V Sync Timing 14...

Page 6: ...Linear Acoustic LA 5269 Transcoder User Guide vi...

Page 7: ...ons and Quick Setup 9 2 1 Unpacking and Inspection 9 2 2 Installation 9 2 3 Rear Panel 10 2 3 1 Connection Ports 10 2 4 Quick Setup Notes 11 Chapter 3 Applications 13 3 1 Example 13 3 2 Latency 14 3 3...

Page 8: ...Address Subnet 29 4 5 2 SNMP Trap Addresses 29 4 6 System Menu 30 4 7 SDI Status Menu 30 Chapter 5 Troubleshooting 33 5 1 Problems and Possible Causes 33 5 1 1 Unit won t power on 33 5 1 2 The Ref LE...

Page 9: ...Dual power supplies SNMP reporting option Encode PCM to Dolby Digital AC 3 Dolby Digital Plus E AC 3 PCM to Dolby Pulse AAC and HE AAC future option Transcode Dolby Digital AC 3 to Dolby Digital Plus...

Page 10: ...a standard reference level of 20dBFS via its digital inputs 1 4 Reset and Upgrades A soft re boot of the unit can be accomplished by briefly and simultaneously pressing the Left Up and Right arrow ke...

Page 11: ...and Feedback Please take a moment to fill out and return the warranty card included with the unit This will enable us to contact you if there are any software or documentation issues Also we are very...

Page 12: ...Linear Acoustic LA 5269 Transcoder User Guide Introduction 8...

Page 13: ...rranty information Please fill out and return the warranty card to Linear Acoustic to ensure your software and documentation are kept up to date 2 2 Installation LA 5269 installation requires One stan...

Page 14: ...unit status GPI currently not used ETHERNET Used for firmware upgrades and SNMP reporting see chapter 3 Main Audio Input Connect the 48kHz PCM signals to these inputs The input chan nels are arranged...

Page 15: ...nnel Dolby Digital encoder option 2 4 Quick Setup Notes The Linear Acoustic LA 5269 is configured at the factory and is ready to go on the air after making the proper input and output connections Appl...

Page 16: ...Linear Acoustic LA 5269 Transcoder User Guide Connections and Quick Setup 12...

Page 17: ...inputs to be PCM Dolby E or Dolby Digital AC 3 and outputs to be Dolby Digital Dolby Digital Plus or option ally Dolby Pulse 3 1 Example Below is a simple connection scenario to highlight some possibl...

Page 18: ...ually removed from the audio path thereby lining up audio and video properly in time The simple block diagram below illustrates the internal signal flow inside a typical MPEG encoder and multiplexer F...

Page 19: ...is copied below Note that this data can be copied and past ed to a text file that can be re named LINEAR ACOUSTIC LA5269 mib and used by an SNMP manager LINEAR ACOUSTIC LA5269 MIB DEFINITIONS BEGIN M...

Page 20: ...l la5269 system 1 software version software version OBJECT TYPE SYNTAX OCTET STRING SIZE 0 40 ACCESS read only STATUS optional DESCRIPTION Device s software version la5269 system 2 firmware version fi...

Page 21: ...ly STATUS mandatory DESCRIPTION Status of power supply 1 DEFVAL 1 la5269 status 1 Power Supply 2 power supply 2 OBJECT TYPE SYNTAX INTEGER fail 1 ok 2 ACCESS read only STATUS optional DESCRIPTION Stat...

Page 22: ...nce OBJECT TYPE SYNTAX INTEGER absent 1 present 2 ACCESS read only STATUS optional DESCRIPTION Status of System Reference DEFVAL 1 la5269 status 4 Audio Detected audio detected OBJECT TYPE SYNTAX INTE...

Page 23: ...tus DEFVAL 1 la5269 status 6 Encoder Decoder codec OBJECT TYPE SYNTAX INTEGER error 1 ok 2 ACCESS read only STATUS optional DESCRIPTION Status of Encoder Decoder module DEFVAL 1 la5269 status 7 Metada...

Page 24: ...m different from generic traps 0 5 and lets them fit into a consistent and small space in BER TLV packet 2 Do not include VARIABLES to keep the overall BER packet size consistent power supply failed t...

Page 25: ...ailed or not detected 12 Metadata Loss trap metadata loss TRAP TYPE ENTERPRISE la5269 DESCRIPTION Trap Metadata lost or not detected 13 Metadata Reverted trap metadata reverted TRAP TYPE ENTERPRISE la...

Page 26: ...Linear Acoustic LA 5269 Transcoder User Guide Applications 22...

Page 27: ...s about software and firmware versions communications status SNMP trap errors and SNMP transmission or reception errors as well as listing any installed op tions This menu also shows the presence for...

Page 28: ...I relays for a hard bypass 4 3 2 Reference Setup Setup Output Reference for the LA 5269 A stable high quality non interrupted signal should be applied and chosen for reference Seems silly to have to e...

Page 29: ...outer or pair shuffler within SDI 4 3 6 Metadata Setup The LA 5269 has been designed to take best advantage of metadata The incoming Dolby or Dolby compatible metadata stream is input as serial RS 485...

Page 30: ...nscoder Encode Input Enables the signal from the 9 10 input from AES or SDI to be ap plied to the transcoder input of the encoder This signal can be Dolby Digital AC 3 or Dolby E if the option is pres...

Page 31: ...n i e the default mode for the stereo line level outputs of most set top boxes and TV sets Choices include Film Std Film Lgt Music Std Music Lgt Speech and None Default is Film Std RF Mode EnA Choose...

Page 32: ...EnB Sets the encoder type for Encoder B to DD for Dolby Digital AC 3 or DD Plus for Dolby Digital Plus E AC 3 Normal default is DD Note that if Transcoding is enabled Encoder Mode EnA and EnB MUST be...

Page 33: ...io De fault is 24 MD Source EnB Selects the metadata source for Encoder B If the chosen metadata source is not available the encoder will revert per the Reversion Mode setting Choices for MD Source ar...

Page 34: ...SDI Status Menu Pressing the left arrow key when at the top menu will display the status of an applied SDI signal The SDI input is auto sensing between SD and HD and although it is not recom mended to...

Page 35: ...Linear Acoustic LA 5269 Transcoder User Guide Detailed Operation 31...

Page 36: ...coustic LA 5269 Menu Tree Version 0 0 15 MD Reversion Last Valid AC 3 Encoder Acmod EnA 3 2L Line Mode Film Std RF Mode Film Std Dialnorm 24 Encoder 2 Ch 7 8 Audio Bit Non Audio Validity Bit Valid Enc...

Page 37: ...ss the I O menu and enable Master Bypass If you are unsure of what is happen ing in a particular system simplifying the signal path is a good start and will help isolate problems quickly 5 1 1 Unit wo...

Page 38: ...exer and it needs to be connected back to the Dolby Digital AC 3 encoder and used as its reference This can be accomplished by applying the signal to Ref In and selecting External Reference as the clo...

Page 39: ...Ethernet Port RJ 45 female jack connector Digital I O Digital Audio Inputs Six unbalanced female BNC connectors comply with AES 3ID 2001 SMPTE 276M Internal 75 Ohm termination Digital Audio Outputs S...

Page 40: ...D DP Encoder Modes Primary up to 5 1 Secondary up to 2 0 Encoder Rates Dolby Digital Up to 640 kbps Dolby Digital Plus Up to 1532 kbps Encoder Latency Dolby Digital DD Plus encode transcode 137msec fi...

Page 41: ...h SMPTE 207M Pin for pin compatible with Dolby metadata sources i e straight through cable should be used Table 6 5 Metadata I O Port Pinout Ethernet Port Standard RJ 45 female connector that supports...

Page 42: ...8 GPI O Parallel Control Port TTL level controls active Low The 5 V output for external GPO indicators is limited by a self resetting fuse Table 6 6 GPI O Port Pinout Pin Connection 1 GPI 1 2 GPI 2 3...

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