Meridian America Meridian 518 manual Help

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Support information	41

Help!

Standby point not lit

Check the following:

1.There is AC power connected to the socket on the rear of the 518

2.The power switch on the rear panel of the 518 is turned on

If the 518 will still not illuminate, check any fuses in your power supply and the fuse in the inlet of the 518. If these are all intact, contact your dealer.

Audible hiss at high volume settings

The input dynamic range of any recordings you have are at maximum 16 bit. The reason for this is that CD and other consumer sources use a 16 bit standard. The analogue sources you have cannot achieve this kind of range. For comparison, analogue sources are likely to be of the order of:

∙FM Radio, 13 bits

∙Reel-reel tape, 13 bits

∙Cassette tape, 12 bits

∙LP, 11 bits.

Note that there may be a difference between the dynamic-range of the source channel when it is operating, and the noise you hear in Standby. For example LP normally has lower noise when the stylus is not in the groove; similarly tape will be quieter when it is stopped. CD may also be quieter when it is stopped, producing so-called ‘digital silence’.

The 518 has a 16 bit capability from input to output on analogue sources. When the volume is turned up high you may hear this dither as a hiss when the sources are stopped. This hiss is lower than the background noise of your recordings and is of no consequence.

No output with Meridian 565, DSP speaker or DAC

Many consumer products will mute when fed a signal in Professional format. If you have no sound – try setting Out to C.

No time display with Meridian DSP speaker

518 removes unnecessary subcode as a method of reducing jitter and therefore improving sound quality.

Because 518 does not pass on subcode, the time display feature on DSP5000 or DSP6000 becomes disabled. However the Meridian Comms system keeps the speaker updated on the current track number.

Communications not working between 518 and other

Meridian products.

If you have this problem check the connections carefully.

Are you using a mix of 200 and 500 mode units?

Radio interference

NOTE 518 is a digital audio and computing device which has been de- signed to very high standards of electromagnetic compatibility.

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