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Thank you for purchasing this Azur 740C Upsampling Compact Disc
Player. We hope that you will appreciate the results and enjoy many
years of listening pleasure from it.
Key to the abilities of the 740C is ATFTM (Adaptive Time Filtering) an
upsampling process developed in conjunction with Anagram
Technologies of Switzerland.
This system intelligently interpolates 16 bit/44.1kHz CD (or other) audio
data to 24bit/384kHz through the use of a 32 bit Analog Devices Black
Fin DSP (Digital Signal Processor) for the very best sound quality. The
ATF system applies sophisticated polynomial curve fitting interpolation
and incorporates a time domain model which allows data buffering and
re-clocking almost completely eradicating digital jitter.
As with the 540C/640C V2 CD players our proprietary Dual Differential
Virtual Earth Balanced filter topology is used. However in the 740C this
has been further enhanced. As the upsampled audio data rate is so
high, aliasing artefacts are moved way above audible frequencies, this
in turn allows us to use a new low order 2 pole linear-phase Bessel
version of the topology for constant group delay and minimal phase shift
in the audio band.
Two very high quality Wolfson WM8740 24 bit DACs (Digital to Analog
Converters) are used in dual differential mode. As each channel has its
own DAC to process information, completely separate and symmetrical
analog filter circuitry can be implemented. These allow both left and
right channel circuitry to operate identically, ensuring the 740C delivers
fantastic sound-staging and stereo imaging properties.
Two digital inputs are fitted allowing other digital sources to be brought
into the 740C and upsampled, the 740C then working as a very high
quality DAC.
A digital output is also fitted which can even output upsampled data at
various rates and word widths, independent from the main audio output,
which is always set at 24/384 for best sound quality.
In addition to these audiophile features Control Bus Input/Output and IR
Emitter Inputs are provided to make it easy to integrate this unit into
Custom Installation systems if desired.
All this proprietary engineering is housed within our low resonance,
acoustically damped chassis. An Azur Navigator remote control is also
provided, giving full remote control of your CD player and Azur amplifiers
in an attractive and easy to use handset.
Your CD player can only be as good as the system it is connected to.
Please do not compromise on your amplifier, speakers or cabling.
Naturally we particularly recommend amplification from the Cambridge
Audio Azur range, and in particular the new 740A Integrated Amplifier
which has been designed to the same exacting standards as this CD
player. Your dealer can also supply excellent quality Cambridge Audio
interconnects to ensure your system realises its full potential.
Thanks for taking the time to read this manual; we do recommend you
keep it for future reference.
Matthew Bramble
Technical Director
2
Contents Introduction
Introduction .................................................................................................2
Limited warranty..........................................................................................3
Safety precautions ......................................................................................3
Important safety instructions .....................................................................4
Rear panel connections..............................................................................5
Front panel controls....................................................................................6
Remote control............................................................................................7
Remote control of matching products.......................................................7
iPod compatibility........................................................................................7
Operating instructions ................................................................................8
External digital sources ..............................................................................9
CD player setup.........................................................................................10
Custom installation use............................................................................11
Troubleshooting ........................................................................................11
Technical Specifications ..........................................................................11
This guide is designed to make installing and using this product as easy as
possible. Information in this document has been carefully checked for accuracy at
the time of printing; however, Cambridge Audio's policy is one of continuous
improvement, therefore design and specifications are subject to change without
prior notice. If you notice any errors please feel free to email us at:
support@cambridgeaudio.com
This document contains proprietary information protected by copyright. All rights
are reserved. No part of this manual may be reproduced by any mechanical,
electronic or other means, in any form, without prior written permission of the
manufacturer. All trademarks and registered trademarks are the property of their
respective owners.
© Copyright Cambridge Audio Ltd 2007
Adaptive Time Filtering (ATF) technology is copyright Anagram Technologies SA. All
Rights Reserved.
iPod is a registered trademark of Apple Computer, Inc. All rights reserved.
2


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