User manual DCS (AUDIO) PURCELL

[. . . ] dCS Purcell Digital to Digital Converter User Manual Software Release 2. 2x September 2004 © dCS Ltd. 1999 - 2004 Price UK £17. 50 / Euro 25. 00 All rights reserved. No part of this publication may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form, or by any means (electronic, mechanical, photocopying, recording or otherwise) without the prior written permission of dCS1. Any person who does any unauthorised act in relation to this publication may be liable to criminal prosecution and civil claims for damages. [. . . ] Set it to Off (0) during electrical storms, or while you are away for a long period. IEC Power Inlet Use with a 3 - pin IEC type power cable. Mains Fuse Replace only with a 20 x 5mm 500mA T HRC fuse. Please see page 66 for replacement details. Manual filename: Purcell Manual v2. 2x. doc English version Page 39 email: more@dcsltd. co. uk web-site: www. dcsltd. co. uk dCS Purcell User Manual dCS Ltd Additional Information Manual for Software Issue 2. 2x September 2004 The rear panel displays the following information about the unit: · · · · The manufacturer's name and address. Model: dCS Purcell The short form of the unit serial number. We will need the serial number (preferably the full serial number from the menu) to give you support over the phone, or to ship you software updates. Manual filename: Purcell Manual v2. 2x. doc English version Page 40 email: more@dcsltd. co. uk web-site: www. dcsltd. co. uk dCS Purcell User Manual dCS Ltd Manual for Software Issue 2. 2x September 2004 Remote Control The Remote Control unit is supplied with all new dCS Elgar Plus or Delius DACs. It is available as an optional extra with Purcell, but is most use with a dCS DAC. Standby Purcell Function AES1 AES2 RCA1 RCA2 Phase BNC Input Filter Vol/Bal Display Mute dCS Figure 10 ­ The Remote Control Purcell button and LED The Remote Control normally controls a dCS Elgar Plus or Delius DAC. do this: To use it to control a Purcell, press the Purcell button () and the blue LED will light up for about 5 seconds. Pressing a button during this time will transmit an Upsampler code instead of a DAC code and keep the Remote Control in Purcell mode (the blue LED stays on) for another 5 seconds. Press the Purcell button again while the LED is lit to return to DAC mode (or just wait 5 seconds). do this: Manual filename: Purcell Manual v2. 2x. doc English version Page 41 email: more@dcsltd. co. uk web-site: www. dcsltd. co. uk dCS Purcell User Manual dCS Ltd Standby button Manual for Software Issue 2. 2x September 2004 () When you have finished listening, press the Purcell button and then press the Standby button while the blue LED is on. The digital outputs will mute, and all displays will turn off except the PWR and STBY indicators. To restore normal operation, press the Standby button again and Purcell will power up ready for use. Note that standby mode will be cancelled if power is lost or a brown-out occurs. Function button () Opens the Function Menu, see page 20. do this: With the blue LED on, use the and buttons () to page through the menu and press Function again to change a setting. Note that the menu may timeout if there is no activity for 5 seconds. Input Selector buttons This group of buttons () select the active digital audio input. do this: With the blue LED on, press AES1 or AES2 to select the AES input, press RCA1 or RCA2 to select the RCA input or press the BNC button to select the BNC input. The Input button steps through all the available inputs in sequence, giving access to the others. Filter button do this: With the blue LED on and the unit locked, press the Filter button one of 4 interpolation filter settings. () to select In this release, 4 sample rate in / out combinations have optional filters. These give a different trade-off between aliassing performance and phase response. This feature is duplicated in the menu, see Filter on page 22. Display button do this: ()With the blue LED on, repeatedly pressing the Display button reduces the display brightness in steps from Bright 7 to Bright 0. This feature is duplicated in the Menu, see Bright on page 27. Up / Down ( / ) buttons do this: With the blue LED on, press one of these buttons () to change the output sample rate. In Purcell mode, the Vol/Bal, Mute and Phase buttons have no effect. Manual filename: Purcell Manual v2. 2x. doc English version Page 42 email: more@dcsltd. co. uk web-site: www. dcsltd. co. uk dCS Purcell User Manual dCS Ltd Manual for Software Issue 2. 2x September 2004 Manual filename: Purcell Manual v2. 2x. doc English version Page 43 email: more@dcsltd. co. uk web-site: www. dcsltd. co. uk dCS Purcell User Manual dCS Ltd Manual for Software Issue 2. 2x September 2004 PURCELL TECHNICAL INFORMATION Digital Interface Specifications AES/EBU (AES3) Type Impedance Sensitivity (unloaded) Maximum Wordlength Connector Connections Pin 1 Pin 2 Pin 3 Input Output Balanced, differential 110 110 1 ~ 10 7 24 24 XLR3 female XLR3 male x2 Ground or shield +Signal -Signal V pk-pk bits Table 3 ­ AES/EBU Interface Electrical Characteristics SPDIF (electrical) Type Impedance Sensitivity (unloaded) Maximum Wordlength Connector Input Output Single ended, ground referred 75 75 0. 5 1. 0 24 24 RCA Phono or BNC V pk-pk bits Table 4 ­ SPDIF Interface Electrical Characteristics SPDIF (optical) Type Wavelength Maximum Wordlength Connector Toslink Input Optical 660 24 Toslink EIAJ CP-340 nm bits Table 5 ­ Optical Interfaces Electrical Characteristics Wordclock Type Impedance Sensitivity (unloaded) Connector Input Output Single ended, ground referred 100 25 TTL TTL BNC BNC Table 6 ­ Wordclock Interface Electrical Characteristics Manual filename: Purcell Manual v2. 2x. doc English version Page 44 email: more@dcsltd. co. uk web-site: www. dcsltd. co. uk dCS Purcell User Manual dCS Ltd 5 Manual for Software Issue 2. 2x September 2004 IEEE 1394 Type Data format Connectors I/O High speed, multi-channel dCS encrypted DSD 6-way (2) Table 7 ­ IEEE 1394 Interface Electrical Characteristics Sample Rates · · · 32, 44. 1, 48, 88. 2 or 96kS/s on single wire interfaces and Wordclock interface, auto selected. 2. 822MS/s for DSD on IEEE 1394 interface, use with a 44. 1kHz wordclock. Frequency Response ­ DDC mode The cut-off frequency of the converted digital data stream depends on the lowest of the two sample rates involved in the conversion. The low frequency response extends to below 10Hz, limited by a DC filter. Figure 11 shows the Filter 1 frequency response curves for converting a 44. 1kS/s source to 44. 1, 48, 88. 2, 96, 176. 4 and 192kS/s. Note that signal frequencies higher than 22. 05kHz are not defined. Filter 1 Response for Conversions from 44. 1kS/s 6 0 -6 -12 Level (dB) -18 -24 -30 -36 -42 -48 10 12 14 16 Frequency (kHz) 18 20 22 Figure 11 ­ Filter 1 Response Curves for Conversions from 44. 1kS/s 5 The IEEE 1394 interface is optional on some models. Manual filename: Purcell Manual v2. 2x. doc English version Page 45 email: more@dcsltd. co. uk web-site: www. dcsltd. co. uk dCS Purcell User Manual dCS Ltd Manual for Software Issue 2. 2x September 2004 Spurious Free Dynamic Range ­ DDC mode Better than 110dB in the frequency range 20Hz to 20kHz, with Filter 1 selected. [. . . ] 76 dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 dBu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27, 51 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Page 82 email: more@dcsltd. co. uk web-site: www. dcsltd. co. uk dCS Purcell User Manual dCS Ltd Manual for Software Issue 2. 2x September 2004 displaying sample rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 dither. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]