Meridian America Meridian 518 Connections, Digital audio connections, Digital input connections

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Connecting 518	29

Connections

There are three types of connection that need to be made to the 518.

∙power, see page 14.

∙digital audio, see page 40.

∙communications, see page 30.

Digital audio connections

Digital connections are made:

∙from the digital outputs of 518 to your digital power amplifiers, digital loudspeakers, digital recording devices, editors.

∙to the digital input of 518 from sources like CD, A/D converters, mixers, digital recording devices, editors.

Digital connections should be made with either:

∙high-quality 75Ω screened cable on SPDIF

∙high-quality 110Ω balanced screened cable on AES/EBU.

For advice on the type of cable we suggest you consult your dealer and the manual supplied with the source equipment.

Meridian has a range of suitable digital interconnects available as accessories. We recommend you do not use cables intended for analogue connection since these do not usually have the degree of shielding or an impedance of 75Ω. Cable intended for UHF applications like antenna down-lead is also unsuitable since it does not shield adequately in the 1– 30MHz region.

Warning. We strongly recommend the use of well-screened precision coaxial cable. Certain ‘audiophile' cables are not screened. Screened cable will minimise RF interaction with your system. Unscreened cables for digital connections may cause illegal levels of RF interference.

Digital input connections

1.Make digital connections from each of your digital sources to an appropriate digital input on 518. The digital inputs on 518 are labelled:

∙D1 to D3 for the three cable inputs, and

∙OP for the optical input.

These inputs are identical in performance and are assigned in Config.

D1 also has an AES/EBU connection. Only one can be used at a time, i.e.

D1 is either SPDIF or AES/EBU not both.

Digital output connection

1.Make digital connections from the output to the equipment you have chosen to follow it.

You can use both the SPDIF and AES/EBU output connections at the same time.

518 User Guide

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Contents 1992, 1993 Contents Appendix 2 Hints on Mastering Simple rules for usingAppendix 4 -Resolution Enhancement Sales and service in the USA Sales and service in the UKDesigned & manufactured in the UK by AcknowledgementsAbout this manual IntroductionAbout the 500 Series Conventions used in this manualGeneral precautions Installing yourUnpacking ConnectionsWhats inside a 518? Planning setupOverview as Preamp Type What else do I need to know? What about analogue sources?Meridian DSP speaker improvement Overview as Resolution Enhancement Processor TypeCD or LaserDisc playback improvement Meridian Surround improvement Overview as Multimedia Processor Type Overview as Mastering Processor Type∙ Normal ∙ Standby ∙ Type ∙ Config Customising featuresStarting off with Switching onBasic operation StandbyOperating 518 as a Control Unit Type Adjusting the volumeSelecting a source OutFlat DitherShape a Shape BDisplay Advanced operation using the Remote Control Volume control Operating 518 as Resolution Enhancer TypeMuting the sound Menu KeysMemory With the Remote ControlOperation summary Config an overview Restoring default settingsConfig control settings Customising 518, an overviewCustomising, general procedure How to customiseConfig sources and inputs How to change to Type or ConfigHow to change back to Normal Customising using TypeMaking changes to an existing setup Setting Type ControllerHow to use Config Customising using ConfigConfig Selecting TypesSetting the system address for Selecting the controller modeSetting the product address for Setting the Standby mode forSetting the Emphasis option for Setting the Blank display option forSetting the Volume mode for Setting the Volume displayVol. dB Setting up sourcesChoosing source logos Choosing the address of a source product Changing the input for a sourceChoosing the Comms type for a source product Digital audio connections ConnectionsDigital input connections Digital output connectionCommunications connections Connecting to Meridian Digital speakersTo connect to other Meridian 500 Series equipment ConMastering Processor PartAs a Mastering or Multimedia Processor Type DescriptionMeridian 500 Comms warning D1 +2ShpB +2 Emph +2Making Recordings Transfer to the final carrier Transfer to editorShaper Advantage 44.1kHz 48kHz Normal Pre-emphasis Noise shaper characteristicsTransparency in digital systems Operating BackgroundDigital Audio and Quantisation DitherPre and De-emphasis Noise Shaping with ditherDynamic Range Step-down in sample word size Simple rules for usingNo change in sample size Step up in dynamic rangeAdditional technical information SpecificationHelp Maintenance & Service CleaningNoise Part Appendix 1 Noise ShapesAbove noise spectrum for Shape B at 44.1kHz 0Hz 5kHz 10kHz 15kHz 20kHz Audible results of digital errors and editing Vulnerability of the signalAppendix 2 Hints on Mastering with noise-shaping Requirements for D/A conversionAppendix 2 Hints on Mastering GoTo Functions Appendix 3 RS232Handset Functions Jitter and de-jittering Appendix 4 -Resolution EnhancementFrequency Dynamic-rangeDynamic-range optimisation with Pre-emphasis Dynamic-range optimisation with GainShowing CD pre- and de-emphasis curves Dynamic-range optimisation with Noise-shaped Dither DAC or channel enhancement by word-length matching DAC enhancement by using high-frequency ditherIndex ContentsIndex User Guide User Guide