Manuel d'utilisation / d'entretien du produit DacMagic du fabricant Cambridge Audio
Aller à la page of 28
azur DacMagic Upsampling digital to analog con verter User’s manual 2 ENGLISH.
2 Introduction............................................................................................................................................ 3 Important safety instructions ................................................................
DacMagic azur 3 ENGLISH Thank you for purchasing this DacMagic Upsampling Digital t o Analog Converter . W e are confident that you will enjoy man y years of listening pleasure from it.
4 For your o wn safety please read the f ollowing im portant safety instructions carefully before attem pting to connect this unit to the mains po wer supply . They will also enable you to get the best performance from and pr olong the life of the unit: 1.
DacMagic azur 5 ENGLISH WEEE symbol The crossed-out wheeled bin is the Eur opean Union symbol for indicating separat e collection for electrical and electr onic equipment. This product contains electrical and electr onic equipment which should be reused, recycled or reco vered and should not be disposed of with unsorted regular waste.
6 FCC regulations NOTE: THE MANUF ACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED BY UNA UTHORIZED MODIFICA TIONS TO THIS EQUIPMENT .
DacMagic azur 7 ENGLISH This unit must be installed on a sturdy , level surface. Do not place in a sealed area such as a bookcase or in a cabinet. Any space open at the back (such as a dedicat ed equipment rack) is fine, howe ver . Do not place the unit on an unstable surface or shelf.
8 Unbalanced Audio Outputs Single-ended conv entional stereo outputs f or connection to the line-lev el phono/RCA inputs of an amplifier . Balanced Audio Outputs The DacMagic also features true balanced (XLR) outputs. This is a higher quality output that can reject noise and interference with equipment with balanced inputs.
DacMagic azur 9 ENGLISH TOSLINK optical – use a high quality T OSLINK fibre-optic inter connect cable designed specifically for audio use. T o achieve the best results we alwa ys recommend using high quality Cambridge A udio leads, which are guaranteed f or life.
10 Power On/Off Switches the unit between On and Off. Source Press to select between USB pla yback or Digital Inputs 1 and 2. The corresponding LED will light up to show which sour ce has been selected.
Phase Indicates the output phase selected. Press and hold the Filter/Phase select button for appr oximat ely two seconds to select normal or in verted phase output. When the LED lights up, the phase is inv erted by the DacMagic. If you suspect that your sour ce material or amplifier , etc.
12 Audio output connections L LR Unbalanced Input Balanced Input R Digital Outputs USB In Balanced Output Unbalanced Output Digital Inputs Digital Inputs L R RL Note: Do not turn on the unit until all connections hav e been made. DacMagic AC adaptor Amplifier OR Use either the unbalanced (RCA/Phono) or balanced (XLR) outputs of the DacMagic.
DacMagic azur 13 ENGLISH Digital audio input connections Digital Outputs Digital Outputs USB In Balanced Output Unbalanced Output Digital Inputs Digital Inputs L R RL Note: Do not turn on the unit until all connections hav e been made. DacMagic AC adaptor CD/DVD play er Connect your digital source t o Digital Input 1.
14 PC-USB connections Digital Outputs USB In Balanced Output Unbalanced Output Digital Inputs Digital Inputs L R RL Note: Do not turn on the unit until all connections hav e been made.
DacMagic azur 15 ENGLISH Connect a USB ‘B–A ’ type lead (as illustrated at lef t) from the DacMagic’s USB input t o one of the USB ports on the PC. This is the normal type of USB lead with an oblong plug at one end and a square plug at the other .
16 Digital Inputs Digital Outputs USB In Balanced Output Unbalanced Output Digital Inputs Digital Inputs L R RL Note: Do not turn on the unit until all connections hav e been made. Digital recorder DacMagic AC adaptor If it is desired to loop out the currently selected digital audio f or recording on a suitable de vice (MD, CD-R, etc.
DacMagic azur 17 The DacMagic can be sited in two different positions, as sho wn in the accompanying diagram. It can be placed horizontally by fitting the f our small individual fee t, or v ertically by using the large rubber ‘foot’. Pow er on the DacMagic using the On/Off button on the front panel.
18 The DacMagic DSP has three different Filter functions: Linear Phase, Minimum Phase and Steep. All three filters are highly sophisticated audiophile t opologies, optimised specifically for audio pla yback.
DacMagic azur 19 The Linear Phase filter is a highly regarded audio filt er offering low ripple in both the pass and stop bands, and what is known as constant group dela y . Constant group dela y means that audio signals of all frequencies are alwa ys delay ed by the same amount when passing through the filt er .
20 Minimum Phase Filter -80 -60 -40 -20 0 20 -200 -180 -160 -140 -120 -100 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Freq uency response frequency/FS (input sampling rate) Magnitude (dB).
DacMagic azur 21 ENGLISH The Minimum Phase filter is another highly regarded audio filt er that offers even lo wer ripple in the pass and stop bands. Unlik e the Linear Phase filter , group delay is n.
22 Steep Filter -80 -60 -40 -20 0 20 -200 -180 -160 -140 -120 -100 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Freq uency response Linear phase filter Steep filter frequency/FS (input sampling rate) Magni.
DacMagic azur 23 Our Steep filter is a linear phase filt er that has been optimised for st op band attenuation of close-in aliasing images. Here we ha ve traded a little attenuation of the v ery highest frequency response (-2dB at 20kHz) and a little more pre- and post-ringing for a v ery steep attenuation just outside the pass band.
24 The follo wing table shows the filter st op band attenuation: Linear Phase Minimum Phase Steep Roll-off at 20kHz -0. 1dB -0. 1dB -2dB Roll-off at 22kHz -1 0dB -10dB -82dB Ultimate roll-off 140dB 14.
DacMagic azur 25 D/A converters Dual Wolfson WM8 7 40 24bit D ACs Digital filter T exas Instruments TMS 320VC550 1 DSP upsampling to 2 4bit 192kHz Analogue filter 2-Pole Dual Differential Bessel Double Virtual Earth Balanced Frequency response 20Hz to 20kHz (±0.
26 There is no power Ensure the supplied AC adapt or is connected securely to the PSU sock et on the rear panel. Ensure that the correct mains transformer is being used and that it complies with the local electrical supply . Ensure the mains plug is fully inserted into the wall socket and is switched on.
DacMagic azur 27 Cambridge Audio warrants this pr oduct to be free fr om defects in mat erials and workmanship (subject to the terms set f orth below). Cambridge Audio will repair or replace (at Cambridge Audio's option) this product or an y defectiv e parts in this product.
© 2008 Cambridge Audio Ltd AP23905/1-A Cambridge Audio is a brand of Audio Partnership Plc Registered Office: Gallery Cour t, Hankey Place London SE1 4BB, United Kingdom Registered in England No.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté Cambridge Audio DacMagic c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du Cambridge Audio DacMagic - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Cambridge Audio DacMagic, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Cambridge Audio DacMagic va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Cambridge Audio DacMagic, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du Cambridge Audio DacMagic.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le Cambridge Audio DacMagic. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Cambridge Audio DacMagic ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
