Bedienungsanleitung Cambridge Audio Azur 851C (Seite 5 von 16) (Englisch)

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Rear panel connections

Power On/Off

Switches the 851C on and off.

Mains Voltage Selector Switch (CU version only)

Switches the 851C mains voltage between 100V and 115V.

Note: For use by Cambridge Audio service personnel only!

Power Socket

Once all other connections are made, connect the supplied power cable

to the 851C power socket and to an appropriate mains socket. The 851C

is now ready for use.

RS232C Interface

The RS232C interface enables external serial control of the 851C in

custom installation applications. A command set is available on the

Cambridge Audio website at www.cambridge-audio.com. The RS232

interface can also be used by Cambridge Audio service personnel for

software updates.

IR (Infra Red) Emitter In

A 3.5mm mini-jack socket that enables modulated IR commands from

multi-room or IR repeater systems to be received by the 851C.

Note: Commands received by the IR Emitter In socket are not looped out

of the Control Bus. Refer to the ‘Custom Installation’ section for more

information.

Control Bus

In – An RCA phono socket that enables un-modulated commands from

multi-rooms systems or other components to be received by the 851C.

Out – An RCA phono socket that provides control bus output commands

for further downstream units.

Digital Outputs

The 851C digital outputs enable a separate DAC (digital to analogue

converter) or digital recording device to be connected. Refer to the

‘Operating instructions’ section for more information.

Three concurrent digital outputs are available. Note these outputs pass

through the currently selected audio source un-processed, i.e. no volume

control or up-sampling is performed on the digital outputs.

Balanced AES/EBU – For external devices incorporating a balanced

(AES/EBU) digital input.

Note: The acronym “AES/EBU” refers to the Audio Engineering Society

and the European Broadcast Union.

Coaxial – To obtain best results, use a high quality 75 ohm digital RCA

interconnect cable (not one designed for normal audio use).

Toslink Optical – Use a high quality TOSLINK bre optic interconnect

cable designed specically for audio use.

USB Interface

A USB B type socket is tted to the 851C to enable the playback of audio

from a personal computer running either Microsoft Windows or Apple

Mac OS X operating systems. Some builds of Linux are also suitable.

Note: Always use a high quality USB connection cable certied as USB Hi-

Speed. USB cable connections longer than 3m may result in inconsistent

audio performance.

Ground Lift Switch

The Ground Lift Switch enables the USB interface earth to be

disconnected from the 851C chassis earth. Disconnecting (lifting) the

earth can be useful if electronic hum is heard through the speakers

when the USB input is selected. The switch should otherwise be left in

the Ground position.

- Digital Inputs 1 & 2

The 851C has three digital inputs in total. Inputs 1 and 2 feature both

S/PDIF co-axial and Toslink optical sockets.

For each input you can use whichever is most convenient, but not both

at the same time.

Coaxial – Use a high quality 75 ohm digital RCA Phono interconnect

cable (not one designed for normal audio use). This input is suitable for

16-24 bit content up to 192kHz.

Toslink Optical – Use a high quality TOSLINK bre optic interconnect

cable designed specically for audio use. This input is suitable for 16-24

bit content up to 96kHz (Toslink is not recommened at 192kHz sampling

rates).

AES/EBU Digital Input

For sources with a balanced (AES/EBU) digital output. This input is

suitable for 16-24 bit content up to 192kHz.

Unbalanced Audio Output

A conventional RCA phono stereo output for connection to the line-level

inputs of an amplier. Use a high quality stereo RCA phono interconnect

cable intended for analogue audio signals.

Balanced Audio Output

The 851C features balanced outputs on two XLR sockets. Balanced

outputs provide slightly better audio performance and can reject

cable-borne noise and interference when used with equipment with

balanced inputs.

Note: XLR connectors should be wired as follows:

Pin 1: Ground

Pin 2: Hot (in-phase)

Pin 3: Cold (phase-inverted)

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851Cazur

ENGLISH

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Always turn the Volume to minimum, switch to another

input or turn the 851C off before plugging/unplugging

cables to the USB input or whilst booting up/shutting

down your PC/Mac.

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