RME HDSP 9652 [40/75] Digital connections

User's Guide HDSP System HDSP 9652 © RME

22. Digital Connections

22.1 ADAT

The ADAT optical input of the HDSP system is fully compatible with all ADAT optical outputs.

RME's unsurpassed Bitclock PLL prevents clicks and drop outs even in extreme varipitch op-

eration, and guarantees a fast and low jitter lock to the digital input signal. A usual TOSLINK

cable is sufficient for connection. More information on Double Speed (S/MUX) can be found in

chapter 32.3.

ADAT 1 In

Interface for a device sending an ADAT signal to the HDSP 9652. Carries the channels 1 to 8.

When receiving a Double Speed signal, this input carries the channels 1 to 4. Can also be used

as SPDIF optical input.

ADAT 1 Out

Interface for a device receiving an ADAT signal from the HDSP 9652. Transmits channels 1 to

8. When sending a Double Speed signal, this port carries channels 1 to 4. Can also be used as

SPDIF optical output.

ADAT 2/3 In

Interface for a device sending an ADAT signal to the HDSP 9652. Carries the channels 9 to 24.

When receiving a Double Speed signal, this input carries the channels 5 to 8 and 9 to 12.

ADAT 2/3 Out

Interface for a device receiving an ADAT signal from the HDSP 9652. Transmits channels 9 to

24. When sending a Double Speed signal, this port carries channels 5 to 8 and 9 to 12.

22.2 SPDIF

Input

The SPDIF input is configured in the Settings dialog, available by a click on the hammer symbol

in the Task Bar's system tray. The HDSP system accepts all commonly used digital sources as

well as SPDIF and AES/EBU. Channel status and copy protection are ignored.

To receive signals in AES/EBU format, an

adapter cable is required. Pins 2 and 3 of

a female XLR plug are connected indi-

vidually to the two pins of a phono plug.

The cable shielding is only connected to

pin 1 of the XLR - not to the phono plug.

The ground-free design, with transformers for coaxial digital inputs and outputs, offers a trouble-

free connection of all devices along with perfect hum rejection and full AES/EBU compatibility.

Output

In SPDIF mode, identical signals are available at both the optical and the coaxial output. An

obvious use for this would be to connect two devices, i.e. using the HDSP as a splitter (distribu-

tion 1 on 2).

Apart from the audio data itself, digital signals in SPDIF or AES/EBU format have a header con-

taining channel status information. False channel status is a common cause of malfunction. The

HDSP system ignores the received header and creates a totally new one for its output signal.