Meridian America Meridian 518 manual Additional technical information, Specification

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Additional technical information

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the dynamic range of the signal itself. A typical application may be a full- range DSP volume control, where e.g. a 16 bit input is modified by a gain control function and passed out to a DAC of 18 or 20 bits. In these cases:

If the programme material permits, use pre-emphasis

Use Shape A or high-pass dither.

Additional technical information

Specification

Inputs

3 cable and one TOSLINK optical.

 

Digital serial interface to AES/EBU or SPDIF

 

2 channels up to 24 significant bits

Outputs

Digital serial interface to AES/EBU or SPDIF

 

2 channels up to 24 significant bits.

Sampling Frequency

32kHz – 48kHz.

Twin PLL

Second phase-lock loop minimises jitter at

 

44.1kHz to approx. 3pS rms.

Input word selection

16, 18, 20, 22, 24 bits

Output word selection

16, 18, 20, 22, 24 bits

Channel status

Output selectable professional or consumer

Dither options

Additive white spectrum TPDF

 

Additive high-pass spectrum TPDF

Noise shapers

5 specific types offered, optimised for each

 

sampling frequency, with and without pre-

 

emphasis and for MAF and MAP hearing

 

thresholds.

Processing

Gain control in 1dB steps from +12 to –99dB

 

Digital-domain pre-emphasis

 

Digital-domain de-emphasis

Accuracy

72 bit internal precision

Display

Gain, processing mode, dither, incoming

 

emphasis, clipping.

Digital Subcode

Channel status only

 

 

Controls

Source, Display, DSP, Dither, In, Out, Gain

Dimensions

325 x 100 x 320mm, (12.9 x 3.9 x 12.6")

Weight

5 kg (10 lb.)

518 User Guide

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Contents 1992, 1993 Contents Appendix 4 -Resolution Enhancement Simple rules for usingAppendix 2 Hints on Mastering Sales and service in the UK Sales and service in the USADesigned & manufactured in the UK by AcknowledgementsIntroduction About this manualAbout the 500 Series Conventions used in this manualInstalling your General precautionsUnpacking ConnectionsPlanning setup Whats inside a 518?Overview as Preamp Type What about analogue sources? What else do I need to know?CD or LaserDisc playback improvement Overview as Resolution Enhancement Processor TypeMeridian DSP speaker improvement Meridian Surround improvement Overview as Mastering Processor Type Overview as Multimedia Processor TypeCustomising features ∙ Normal ∙ Standby ∙ Type ∙ ConfigSwitching on Starting off withBasic operation StandbyAdjusting the volume Operating 518 as a Control Unit TypeSelecting a source OutDither FlatShape a Shape BDisplay Advanced operation using the Remote Control Operating 518 as Resolution Enhancer Type Volume controlMuting the sound Menu KeysOperation summary With the Remote ControlMemory Restoring default settings Config an overviewConfig control settings Customising 518, an overviewHow to customise Customising, general procedureConfig sources and inputs How to change to Type or ConfigCustomising using Type How to change back to NormalMaking changes to an existing setup Setting Type ControllerCustomising using Config How to use ConfigConfig Selecting TypesSelecting the controller mode Setting the system address forSetting the product address for Setting the Standby mode forSetting the Blank display option for Setting the Emphasis option forSetting the Volume mode for Setting the Volume displayChoosing source logos Setting up sourcesVol. dB Choosing the Comms type for a source product Changing the input for a sourceChoosing the address of a source product Connections Digital audio connectionsDigital input connections Digital output connectionConnecting to Meridian Digital speakers Communications connectionsTo connect to other Meridian 500 Series equipment ConPart Mastering ProcessorDescription As a Mastering or Multimedia Processor TypeMeridian 500 Comms warning D1 +2Emph +2 ShpB +2Making Recordings Transfer to editor Transfer to the final carrierNoise shaper characteristics Shaper Advantage 44.1kHz 48kHz Normal Pre-emphasisOperating Background Transparency in digital systemsDigital Audio and Quantisation DitherDynamic Range Noise Shaping with ditherPre and De-emphasis Simple rules for using Step-down in sample word sizeNo change in sample size Step up in dynamic rangeSpecification Additional technical informationHelp Cleaning Maintenance & ServicePart Appendix 1 Noise Shapes NoiseAbove noise spectrum for Shape B at 44.1kHz 0Hz 5kHz 10kHz 15kHz 20kHz Vulnerability of the signal Audible results of digital errors and editingAppendix 2 Hints on Mastering with noise-shaping Requirements for D/A conversionAppendix 2 Hints on Mastering Handset Functions Appendix 3 RS232GoTo Functions Appendix 4 -Resolution Enhancement Jitter and de-jitteringDynamic-range FrequencyDynamic-range optimisation with Gain Dynamic-range optimisation with Pre-emphasisShowing CD pre- and de-emphasis curves Dynamic-range optimisation with Noise-shaped Dither DAC enhancement by using high-frequency dither DAC or channel enhancement by word-length matchingContents IndexIndex User Guide User Guide