User manual RME ADI8PRO

[. . . ] User's Guide SyncAlign ® ® TM SyncCheck Intelligent Clock Control Hi-Precision 24 Bit / 48 kHz 8 Channel AD / DA-Converter ADAT® optical / TDIF®-1 Interface Digital 24 Bit Interface / Format Converter TDIF-1 24 Bit Interface 2 User's Guide ADI-8 PRO © RME Contents 1 2 3 4 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Supplied Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Brief Description and Characteristics . . . . . . . . . . . . . . . . . . . 4 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] For wrong termination with 2 x 75 Ohms (37. 5 Ohms), there are still 3. 3 Vss at the output. User's Guide ADI-8 PRO © RME 11 7. Clock Section The ADI-8 PRO provides an outstanding clock section with professional features you won't find anywhere else. The unique Intelligent Clock Control (ICC) enables a flexible operation with internal clock (44. 1 and 48 kHz), external word clock or the digital input signals. These options are easy to understand and easy to use thanks to a clear display of the corresponding lock and sync state. A/D The clock source of the AD-converter can be Internal (quartz crystal), External (BNC word clock) and Input (the digital input signal TDIF or ADAT). Internal 44. 1 kHz or 48 kHz sample rate is available. D/A The same options are available for the DA-converter. The key DIGITAL INPUT determines the digital input being used and the clock source in case INPUT was activated before. As not all combinations of clock settings make sense some of them are blocked. The limitations mainly affect TDIF operation and the setting Clock D/A INTERNAL. Please note that the D/A key has priority. In case an allowed combination can't be set simply press the D/A key, set A/D as desired, and set D/A back to its last state. The Lock state of the ADI-8 PRO is indicated by a blinking (error) or constantly lit (Ok) EXT. or INPUT LED in the Clock section. Clock Mode D/A Internal Clocking the DA-converter from the internal quartz crystal is propably the most outstanding feature of the ADI-8 PRO. This technique provides simply the best sound quality, as the internal clock has very low jitter, so that the DA-converters can achieve the highest signal to noise ratio and lowest distortion. The setting Clock D/A INTERNAL requires a synchronous operation of all devices. To guarantee this the external device connected to the ADI-8 PRO has to synchronize itself to the clock from the word clock out or ADAT/TDIF out of the ADI-8 PRO. The ADI-8 PRO has to be master, all attached devices slave. To prevent a not better but worse sound quality caused by imperfect or even no synchronisation a special method called SyncCheck compares the synchronicity of the incoming data with the internal clock of the ADI-8 PRO. The actual state is indicated by a blinking (error) or constantly lit (Ok) ADAT or TDIF LED in the DIGITAL INPUT section. In clock mode D/A INTERNAL the clock choices EXTERNAL and INPUT of the AD-section do not make sense, as the clock at the digital output has to be synchronous to the internal clock. Therefore A/D INTERNAL is automatically activated and cannot be changed. 12 User's Guide ADI-8 PRO © RME 8. [. . . ] In case of any error or defect please contact your local dealer. The warranty does not cover damage due to abuse, incorrect installation or incorrect handling. RME's liability is limited to the repair or the replacement of the product, and does in no way include the liability for incidental or consequential damages resulting from using the ADI-8 PRO. 15. Appendix RME news and further information on our products can be found on our website: www. rme-audio. com Manufacturer: Elektronischer Gerätebau Mittweida, Goethestr. [. . . ]