dCS 904 User Manual

Manual for Software Version 1.5x and 1.36

dCS Ltd

June 2000

 

 

THE HARDWARE – CONTROLS AND CONNECTORS

Rear Panel

CH1(L)

CH2(R)

Sensitivity

Reference In

Reference Out

AES1

AES2

AES3

AES4

CH1

 

CH2

In

MAINS FUSE 2A(T) ON OFF

PUSH

PUSH

 

PUSH

 

 

 

 

 

 

 

 

 

 

 

 

CH1(L) CH2(R)

 

 

 

 

 

 

In

SDIF-2/DSD

Out

 

Remote

 

 

 

 

 

 

 

 

 

Out

 

 

 

 

 

 

 

 

 

75R

 

 

 

 

 

 

 

 

 

 

 

Clk

 

 

 

Analogue

 

 

Digital I/O

 

 

 

 

 

 

 

 

 

 

Figure 1– Rear Panel

All input and output connectors are mounted on the rear panel. Individual connectors are clearly identified by the panel legend. Viewed from the rear from left to right, the connectors are as follows:

Balanced Analogue Inputs

3 pin XLR female (2 off)

Input Level Adjustment

(trimmers)

Two multi-turn potentiometers set the full scale input levels. These are factory preset for full scale with input levels of +20dBu. If necessary, adjust with a suitable trim tool or a small screwdriver. Turn clockwise for increased gain. Take care to ensure the stereo inputs remain in balance. The trim range is ±6dB.

Reference In

3 pin XLR female

Reference Out

3 pin XLR male

Reference In is an AES/EBU reference input for synchronising the unit to a Master Clock. Reference Out is an unbuffered loop through, directly coupled to it, for use in a reference daisy chain. A terminating resistor may be turned on or off, using the menu (see Ref In command, page 23), if several units are to be daisy chained with the same word clock.

In addition, under the control of the ADC/Data button, the Reference In connector can be used as a data input. In this mode, it takes data from the input instead of from the internal ADC, and allows all the formatting and DSP functions (such as noise shaping and word length control) to be applied to input data. See page 14.

AES1, 2, 3 & 4 Digital Outputs

3 pin XLR male (4 off)

Four AES/EBU outputs which may be used independently or in groups of two or four. They are used for the various PCM formats, including normal and double speed and two and four wire, and also for some DSD formats.

SDIF/DSD CH1, CH2 Data

BNC (2 off)

These BNC connectors can be both outputs and inputs. In normal operation they are outputs for SDIF-2 encoded PCM, or for SDIF-2 and SDIF-3 encoded DSD. They are both TTL level signals for a 75 ohm line. They can be set to TTL level AES3 coded signals, using the menu (see the BNC O command, page 22).

In addition, they can be used for data input, for re-formatting DSD data, under the control of the ADC/Data button (see page 14)

Manual part no: DOC135904 iss 2B2

Page 10

135904ma2b2.pdf file available from website

Contact dCS on + 44 1799 531 999

email to: more@dcsltd.co.uk

(inside the UK replace + 44 with 0)

web site: www.dcsltd.co.uk