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Owner’S Manual

© 2009

CeDar

audio ltd

Manual version 1.00: august 2009

ADA

converter

HDA headphone amplifier

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Summary of Contents for ADA

Page 1: ...Page 1 Owner S Manual 2009 CEDAR Audio Ltd Manual version 1 00 August 2009 ADA converter HDA headphone amplifier ...

Page 2: ...Page 2 ...

Page 3: ...DA Rear Panel Connections and Operation 8 HDA Introduction 12 HDA Rear Panel Connections and Controls 13 HDA Front Panel Connections and Operation 14 CE Declaration of Conformity 15 Specifications CEDAR ADA 16 Specifications CEDAR HDA 17 Licence and Limited Warranty 18 ...

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Page 5: ...elds should not exist nearby Do not subject the unit to strong sunlight excessive dust mechanical vibration or periodic shocks It is not susceptible to excessive heat build up but should be installed away from heat sources such as radiators and audio devices that produce large amounts of heat n Mains voltage and Earthing Grounding Before connecting to mains power ensure that the voltage selector i...

Page 6: ...kHz or 96kHz Slave Mode If a digital signal is present at the selected digital input the ADA synchronises to it If no such signal is present no output is generated Auto Mode If a digital signal is present at the selected digital input the ADA synchronises to it If no such signal is present the ADA uses its internal master clock at the user selected sample rate Auto Lock Mode This operates in the s...

Page 7: ...status bits embedded within the digital audio For sample rates of 32kHz 44 1kHz and 48kHz the status bits can be set to Professional or Consumer mode For sample rates above 48kHz the status bits will be forced to Professional mode because the ADA does not support Consumer mode at these rates Front Panel LED The LED on the front panel is normally lit to indicate that power is present Flashing indic...

Page 8: ... panel The input gain can be set such that signals of 12 18 or 24dBu generate full scale signals in the digital domain Individual preset controls provide a further 3dB to give an input level range of 9dBu to 27dBu The consumer input on the phono connector has a further gain of 10dB to provide an input level range of 1dBu to 17dBu Input Level Settings dB Output Level Settings dB Switch 12 18 24 Swi...

Page 9: ...t The RCA phono outputs are unbalanced and have an output impedance of less than 75Ω Output Level Adjustment The output gain can be adjusted individually for the left and right channels using the rear panel DIP switches Each output gain can be set such that a full scale digital output provides 12 18 or 24dBu output on the analogue XLR connectors The level at the unbalanced output is 10dB lower tha...

Page 10: ...e set to 24 20 or 16 bits When the signal is truncated from 24 bits a psychoacoustic filter is applied to maintain optimum signal quality These settings are summarised by the following tables Switch Status Meaning 1 ON PROFESSIONAL 1 OFF CONSUMER 2 ON DE EMPHASIS AUTO 2 OFF DE EMPHASIS OFF Switch Wordlength 16 bit 20 bit 24 bit 3 OFF OFF ON 4 OFF ON ON All current CEDAR digital processors are 24 b...

Page 11: ... be set by and locked to the internal on board clock generator at the frequency closest to the previous digital input n Slave Sync Mode Switch position D The digital output sample rate follows the digital input When a digital input signal is not present the digital output is turned off The following table summarises this It shows the sample rate generated by the internal clock in Master and Auto S...

Page 12: ...connectors comprise a balanced XLR 3 for the AES EBU input and an unbalanced phono connector for the S PDIF input A button located on the rear panel determines which input is active and de emphasis on the output can be controlled via a dipswitch If de emphasis is selected the HDA will decode 50 15µs emphasis when indicated by the status bits in the incoming digital audio Block Diagram Source Selec...

Page 13: ...hese connectors should meet the IEC 60968 specification AES EBU Input The XLR 3 pin socket has an impedance of 110Ω It has the following connections n Pin 1 Screen n Pin 2 Signal ve hot n Pin 3 Signal ve cold SPDIF Input The SPDIF input has an impedance of 75Ω Status Select Switches Switch Status Meaning 1 ON DE EMPHASIS AUTO 1 OFF DE EMPHASIS OFF 2 Reserved 3 Reserved 4 Reserved ...

Page 14: ...s its own volume control The maximum output level is 12dBu Power Signal Indicator The LED on the front panel is normally lit to indicate that power is present on the unit Flashing indicates a loss of a valid digital input signal WARNING Use of headphones at high volume or for long periods can cause permanent hearing damage When connecting and using headphones please ensure that operating condition...

Page 15: ...ions in this manual fully conforms to the protection requirements of the following EC Council Directives on the approximation of the laws of the member states relating to Electromagnetic Compatibility EN55103 1 1997 Limits of disturbance for audio apparatus for professional use For use in environments 1 to 4 EN55103 2 1997 Immunity requirements for audio apparatus for professional use For use in e...

Page 16: ...dBu 24dBu for FSD Gain Range Adjustable 3dB loss to 3dB gain L and R adjust Signal to Noise Better than 109dBfs RMS A weighted at 24bit Dynamic Range 110dB D A Connections Digital Inputs 1 x AES EBU XLR 3 pin socket 1 x SPDIF RCA phono Analogue Outputs 2 x XLR 3 pin male balanced L R 2 x RCA phono unbalanced L R D A Audio Specification Max Output Level 24dBu balanced outputs Max Output Level 14dBu...

Page 17: ...stereo jack sockets Power 150 mW into 32Ω 600Ω each ouput Maximum Output Level 12dBu Headphone Gain 80dBu to 12dBu Common Mains Power Mains Input IEC 110 120VAC or 220 240VAC switchable 50 60Hz Consumption 10W max Physical Dimensions 480mm W x 108mm D x 44mm H nominally 1U Dimensions Boxed 530mm W x 205mm D x 60mm H Weight 2 2kg Gross 1 6kg Net CEDAR Audio Ltd reserves the right to alter specifica...

Page 18: ...RANTY AND POST WARRANTY OBLIGATIONS 4 1 The Company warrants that the System will perform substantially in accordance with the appropriate section of this manual for a period of one year from the date of supply to the Company s immediate customers 4 2 The Company will make good at its own expenses by repair or replacement any defect or failure that develops in the System within one year of supply ...

Page 19: ...em by the Company from its immediate customer depreciated on a straight line basis over a one year write off period or b repair or replacement of those components of the System that do not meet the warranties contained within this Document The foregoing states the entire liability of the Company to the Licensee 10 CONSEQUENTIAL LOSS Even if the Company has been advised of the possibility of such d...

Page 20: ... HDA CEDAR ADA Serial number Inspection date QC Engineer CEDAR HDA Serial number Inspection date QC Engineer CEDAR Audio Ltd 20 Home End Fulbourn Cambridge CB21 5BS United Kingdom www cedaraudio com info cedaraudio com ...

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