RME Audio ADI-4 DD User Manual Download Page 1

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User's Guide

ADI-4 DD

SyncAlign

SyncCheck

Intelligent Clock Control

SteadyClock

Hi-Precision 24 Bit / 96 kHz

AES / ADAT Dual Format Converter

8-Channels ADAT

optical from / to AES/EBU Interface

AES-3

24 Bit Interface

Summary of Contents for ADI-4 DD

Page 1: ...e ADI 4 DD SyncAlign TM SyncCheck TM Intelligent Clock Control TM SteadyClock TM Hi Precision 24 Bit 96 kHz AES ADAT Dual Format Converter 8 Channels ADAT optical from to AES EBU Interface AES 3 24 Bi...

Page 2: ...lock Input and Output 14 9 Word Clock 9 1 Operation and Technical Background 15 9 2 Cabling and Termination 16 10 Conversion Modes and Notes 10 1 8 channel AES to ADAT Converter 96 kHz 17 10 2 8 chann...

Page 3: ...1 unit height The compact device has numerous extraordinary fea tures like Intelligent Clock Control ICC SyncCheck SyncAlign Bitclock PLL SteadyClock active jitter suppression and patchbay functionali...

Page 4: ...2 x TOSLINK according to Alesis specification Standard 8 channels 24 bit up to 48 kHz Copy Mode up to 2 x 8 channels 24 bit 48 kHz Sample Split S MUX 2 x 8 channels 24 bit 48 kHz equalling 8 channels...

Page 5: ...at Consumer SPDIF according to IEC 60958 Single Wire 4 x 2 channels 24 bit up to 96 kHz Double Wire 4 x 2 channels 24 bit 48 kHz equalling 4 channels 96 kHz ADAT Optical 2 x TOSLINK Standard 8 channel...

Page 6: ...Determines the current AES 1 input Options are the XLR socket on the rear the 25 pin D Sub connector and the optical input IN 2 SYNC Determines the clock source Options are Word Clock ADAT IN 1 and t...

Page 7: ...with the clock source can be set to word clock ADAT IN 1 and AES where AES lets you select between the inputs XLR D Sub and optical Lock state and clock synchronicity are being displayed by the state...

Page 8: ...processed by using a simple cable adapter RCA XLR To achieve this pins 2 and 3 of an XLR plug are being connected to the two con tacts of a Phono RCA plug The ground shield of the cable is only conne...

Page 9: ...formation Audio signals with Emphasis have a strong high frequency boost and thus require a high frequency attenuation on playback Emphasis is not available within the ADAT standard This information i...

Page 10: ...5 6 7 8 AES EBU 1L 1R 2L 2R 3L 3R 4L 4R If the input data is encoded with Sample Split S MUX the AES output has to be set to DS mode manually Every input contains the information of only 4 channels f...

Page 11: ...r is chosen the output signal will have a channel status compatible to SPDIF As far as we know every SPDIF device should be capable of handling an input signal of up to 5V instead of the usual 0 5V Ne...

Page 12: ...signal in Double Wire format is present carrier 32 to 48 kHz and DS MODE AES is activated the data split into up to 8 channels is being converted into the original up to 4 channels Single Wire 64 to 9...

Page 13: ...ecessarily mean that the received signal is correct with respect to the clock which processes the read out of the embedded data Example 1 The ADI 4 DD is synced to 44 1 kHz of a CD Player connected to...

Page 14: ...ntly active and basically delivers the sample rate of the left part as word clock signal Thanks to SteadyClock the output word clock is independent from the quality of the received clock and almost ji...

Page 15: ...has some disadvantages The word clock is based on a fraction of the really needed clock For example SPDIF 44 1 kHz word clock a simple square wave signal has to be multiplied by 256 inside the device...

Page 16: ...eliable if cables are not terminated at all Ideally all outputs of word clock delivering devices are designed with very low impedance but all word clock inputs with high impedance in order to not weak...

Page 17: ...same data the input signal is split to eight stereo pairs for ADAT For sample rates above 56 kHz the DS LED lights up and the outputs operate in Sample Split mode Each output OUT 1 OUT 2 then carries...

Page 18: ...idged with a loop back cable OUT 1 to IN 1 OUT 2 to IN 2 ADAT must not be chosen as clock source SYNC 10 7 8 channel ADAT to AES Converter 96 kHz SOURCE ADAT Remark If the input data is encoded in Sam...

Page 19: ...wire receiver transmitters that could also work with double sample rate It was then possible to transmit two channels of 96 kHz data via one AES EBU port But Double Wire is still far from being dead O...

Page 20: ...in the data stream However there are blocks of additional information which are different for both standards In the table the meaning of the first byte 0 is shown for both formats Already in the firs...

Page 21: ...tus display Lock of inputs Double Speed Audio level Clock source Word Clock ADAT AES Double Speed Word Clock AES Status AES output Professional Consumer Optical output AES 1 input output ADAT SPDIF ou...

Page 22: ...be changed Euphonix Signal In 1 2 In 1 2 In 3 4 In 3 4 In 5 6 In 5 6 In 7 8 In 7 8 D Sub 15 2 4 16 18 5 7 19 Signal Out 1 2 Out 1 2 Out 3 4 Out 3 4 Out 5 6 Out 5 6 Out 7 8 Out 7 8 D Sub 21 8 10 22 24...

Page 23: ...ording to AES3 1992 1 GND shield 2 Signal 3 Signal AES EBU and SPDIF are biphase modulated signals therefore polarity doesn t matter Pins 2 and 3 are neither hot nor cold they carry the same signal Bu...

Page 24: ...24 User s Guide ADI 4 DD RME 14 Block Diagram...

Page 25: ...of the ADI 4 DD The general terms of business drawn up by Au dio AG apply at all times 16 Appendix RME news and further information on our products can be found on our website http www rme audio com D...

Page 26: ...t the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet o...

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