Lab.gruppen PLM series Operation Manual

Also see for PLM 10000Q: Supplementary guide User manual addendum Specifications Quick start Technical data

Contents

Lab.gruppen PLM series Operation Manual Manual pdf 73 page image

Back Panel Interface67PLM Series Operation Manual rev 1.1.98.3 AES3 Digital I/O8.3.1 AES3 XLR ConnectorAES/EBU digital audio input is via an XLR3F connector, which is directly paralleled to the adjacent XLR3MAES/EBU Link connector. Wiring of this connector follows the same standard as for analog XLR connectionsas shown section 8.2.2.AES/EBUINPUT 1-2 LINK 1-2Figure 8-12: AES3 XLR Input and Link ConnectorsFigure 8-9 on page 65 shows the only possible method of wiring; there is no equivalent of an unbalancedconnection in the digital domain.The AES3 signal format carries two channels of audio and associated data on a single cable/connector.Selection of Ch 1 or Ch 2 is performed within the digital processing section of the PLM and is controlledfrom the menu system. Please refer to section 7.11.3.1 for further details.The AES3 Link connector may be used to daisy-chain the inputs of multiple PLMs together. Unlike daisy-chaining of analog inputs, attention must be paid to line termination. When daisy-chaining PLMs together,only the last PLM in the chain should be set to TERMINATED. All other PLMs should be set to UNTERMI-NATED. Please refer to section 7.11.3.2 for further details.As with balanced analog audio, there is a finite limit to how many PLMs may have their AES/EBU inputsdaisy-chained together. The practical limit will be determined by cable type and length as well as the outputcircuit of the driving source. It may be necessary to employ an AES/EBU line driver or distribution amplifierto achieve reliable results in some situations.Tests indicate that up to 20 PLMs may be havetheir AES3 inputs daisy-chained together, howevercircumstances and cabling used may reduce thisfigure. Please refer to section 10.6.