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RME ADI8 DS
 
Manufactured by » RME
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User Manual
Description


RME ADI8 DS
High-Precision 8-Channel 96 kHz ADAT TDIF AD/DA converter

The RME ADI8 DS is an 8-Channel AD/DA converter with reference approach. The compact 19" 1U rackmount enclosure includes several outstanding features, like Intelligent Clock Control (ICC) Intelligent Clock Control (ICC)

left front Left Front

RME ADI8 DS Features:
-8 channel AD-converter, completely symmetrical and DC-coupled audio path, 117 dBA SNR AD
-8 channel DA-converter, balanced output, 112 dBA DA
-ADAT optical inputs, 24-Bit, based on RME's unsurpassed Bitclock PLL for sample accurate lock
-ADAT optical outputs, 24-Bit, fully compatible to all ADAT optical inputs
-TDIF-1 interface, 24-Bit, Low Jitter PLL, Emphasis support, DA-88 compatible
-Bit Split/Combine, Copy Mode, ADAT and TDIF usable in all combinations
-Copy Mode adds a unique 24-Bit ADAT to/from TDIF converter
-Digital Patchbay operation, allows to copy, duplicate and distribute the digital input signals
-Dither available, for full compatibility to 16-Bit even at 96 kHz
-SyncCheck, unique technology to check clock synchronisation
-Virtual Sample Buffer, allows to use the internal Low Jitter Clock (quarz crystal) even for DA-conversion
-Automatic storage of all settings
-Connectivity
  -8 x Analog I/O
  -2 x ADAT I/O
  -1 x TDIF-I/O
  -1 x Word Clock I/O
  -Samplerate: up to 96 kHz

right front Right Front

The unique SyncCheck and AutoSync technology has evolved into the new Intelligent Clock Control of the Hammerfall DSP system. HDSP is the only digital I/O-system worldwide capable of measuring and displaying the frequency of all clock sources. Even word clock. Based on validity and current sample rate the system then decides which clock source should be used - fully automated and performed in hardware. With this the HDSP system offers the most easiest handling of the present clocks, although having a lot digital inputs, plus the most advanced support when configuring the clock setup.

left rear  Left Rear

When working with several digital sources it is not only necessary that these are all properly locked, they also have to be totally synchronized. Else drop outs and crackling occurs.

right rear Right Rear

RME's exclusive SyncCheck checks all input signals. In clock mode Master the synchronous operation to the internal clock is checked. This outstanding and unique technology helps to find errors immediately. The actual state of each input is displayed in the settings dialog.

SyncAlign includes several methods and techniques to guarantee absolute data alignment with regard to time and channels. No RME digital audio card will ever swap channels, not in stereo nor in multi channel mode, regardless what you do with the card and the signals it gets. SyncAlign also controls the timing among the channels, no matter how much are used, they will always start sample-aligned.

When the record while play mode is activated, the corresponding software first starts record and then playback (or playback then record.) SyncAlign can compensate the time difference so that an exact simultaneous start of record and playback in the record while play mode is guaranteed. In asynchronous mode (different programs use different stereo devices of one card) this part of SyncAlign is automatically deactivated. , TDIF/ADAT converter and Bit Splitter. AD- and DA-circuit automatically operate either independently or linked. The latest 24-Bit converters with 128 times oversampling achieve 117 dBA true dynamic range. All digital inputs and outputs operate at full 24-bit resolution. If you have been waiting for a flexible, fully professional yet affordable multi-Channel converter - the wait is over.

The RME ADI8 DS is nearly identical to the ADI8 PRO. Additional features include 88.2 and 96 kHz sample rate and Dither. DS stands for Double Speed, meaning double sample rate. As ADAT optical does not support sample rates higher than 48 kHz the DS mode requires two channels to transmit the data of one channel. The used method called Sample Split is compatible to S/MUX, and also found in the Hammerfall and Hammerfall Light. The combination Hammerfall/ADI8 DS allows DVD-compatible Hi-End recordings (up to 8 channel @ 96 kHz), at an astonishing low price.

The RME ADI8 DS' astonishing capabilities are easy to explore thanks to a simple and easy to understand user interface. Let's have a short walk over the front panel from left to right. Setting up the ADI8 DS starts with an input sensitivity that perfectly suits your needs and maintains the excellent dynamic range of the AD-Converters. INPUT LEVEL lets you choose between Lo Gain, +4 dBu, -10 dBV.

Each analog input has its own 'Signal Present' and 'Clip' LED, so levels and Overload are easy to check. The key PROCESS activates Bit Split (spread the 24-Bit signal on two outputs), Double Speed mode (DS) and Dither (Dith.) Bit Split allows two 8-Channel 16-Bit tape recorders to record 8 channels in 24-Bit resolution. Bit Split works with both TDIF and ADAT.

RMEs intelligent clock control (ICC) provides professional features you won't find anywhere else. First set the clock of the AD-Converter, choose between INTERNAL, EXTERNAL (BNC word clock) or INPUT (the digital input signal ADAT or TDIF.) The internal clock can be 44.1/48 or - when DS is active - 88.2 or 96 kHz. The DA-Converter has the same settings available. The current state of locking and clock synchronization is shown by blinking or constantly lit LEDs. The next key DIGITAL INPUT determines the used digital input, and the clock source in case INPUT was activated.

DIGITAL INPUT is already part of the DA-Converter section. Next is COMBINE which activates both the re-combination of split signals back to a full 24-Bit signal and Double Speed mode. The key COPY MODE routes the digital input to the digital outputs ADAT and TDIF. As these operate simultaneously sending identical data the ADI8 DS not only turns into a superior ADAT/TDIF converter, but also allows copying between devices of the same format and a distribution to different devices. For example an ADAT signal can be distributed to 2 ADAT plus 2 TDIF outputs simultaneously. In Copy Mode also both Bit Split and COMBINE are available, so it's possible to recombine a split signal while copying, or split a not split signal, or recombine and split again into another format. With this the RME ADI8 DS turns into an extremely powerful TDIF/ADAT interface.

Each analog output has its own 'Signal Present' LED which works in an analog fashion (brighter at higher levels.) A push on OUTPUT LEVEL sets Hi Gain, +4 dBu or -10 dBV as analog output level.

The RME ADI8 DS's back shows an impressive number of connectors of all kinds which result in an unbeaten flexibility and compatibility. Whatever it is - simply get connected and enjoy the sonic clarity you've been missing when doing multitrack recording for so long.

The RME ADI8 DS internal structure can be divided into 4 distinct functional blocks:
-Analog In: analogue input stage with gain compensation, A/D-converter
-Analog Out: D/A converter and analogue output stage with gain compensation
-Digital I/O: ADAT optical and TDIF interfaces
-Clock Control: Controls all timing for all functions, Word Clock I/O, PLL

The RME ADI8 DS can be routed internally in many ways which, in addition to its function as A/D-D/A converter, allows it to be used as a format converter, distributor or splitter.
-Format converter: 24-bit digital conversion from ADAT optical to TDIF and vice versa
-Distributor: Sends digital input to all outputs simultaneously, e.g. TDIF in to TDIF out and 2 x ADAT
-Splitter: Sends analogue input to all digital outputs simultaneously, i.e. for A/D conversion to 2 x TDIF and 2 x ADAT (optical)

Physical access to the analogue inputs is either via 1/4" stereo jack socket or 25-pin D-type connector conforming to the Tascam DAxx analogue I/O pinout. These recorders are very common, so a suitable multicore cable (e.g. for connecting directly to mixing consoles or to XLR) should be relatively easy to find. The entire input stage - from the sockets to the converter chip's internal input - is fully symmetrical. This is a special servo-balanced input circuit: if the signal at the input is unbalanced, input gain is automatically adjusted by +6 dB. Otherwise input sensitivity for an unbalanced signal would have been lower than for a balanced one.

Any A/D converter is only as good as the gain compensation at the input. The RME ADI8 DS has 3 gain levels, making it compatible with a wide range of studio equipment - loss is avoided before the signal gets to the A/D converter. Input gain is switchable between Lo Gain, +4 dBu and -10 dBV, and employs a special damping technique: using latest hi-grade electronic switches (ADG 451), the gain switch could be placed in the best possible position within the signal path. This approach makes additional amplifier circuitry or long cables to mechanical components unnecessary (and obsolete.) The D/A converters get the best quality signal possible, so they can reach maximum SNR (signal-to-noise ratio) with minimum distortion.

RME ADI8 DS Specifications:
-Input AD: 1/4" TRS jack and 25 pin D-type connector, servo balanced, completely symmetrical DC-coupled audio path
-Output AD: ADAT optical, TDIF-1 (both 24-bit), word clock
-Input DA: ADAT optical, TDIF-1 (both 24-bit), word clock
-Output DA: 1/4" TRS jack and 25 pin D-type connector, servo balanced, DC-coupled audio path
-SNR AD: 117 dB(A)
-THD AD: < -110 dB (< 0.00032 %)
-THD+N AD: < -104 dB (< 0.00063 %)
-Crosstalk AD: > 130 dB
-SNR DA: 112 dB(A) unmuted
-THD DA: < -104 dB (< 0.00063 %)
-THD+N DA: < -102 dB (< 0.0008 %)
-Crosstalk DA: > 110 dB
-Input/Output level at 0 dBFS @ Hi Gain: +19 dBu
-Input/Output level at 0 dBFS @ +4 dBu: +13 dBu
-Input/Output level at 0 dBFS @ -10 dBV: +2 dBV
-Frequency response AD/DA -0,1 dB: 5 Hz - 21,5 kHz (sf 48 kHz)
-Frequency response AD/DA -0,5 dB: < 5 Hz - 44,8 kHz (sf 96 kHz)
-Power supply: internal, 100 V-240 V AC, 100 V-240 V AC
-Dimensions 483 x 44 x 200 mm
-Warranty: 2 years (Warranty administered only through RME, Inc)

     

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