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dCS 904 User Manual Manual for Software Version 1.5x and 1.36
dCS Ltd June 2000
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
T
HE
H
ARDWARE
– C
ONTROLS AND
C
ONNECTORS
Rear Panel
PUSH
Analogue
CH1(L) CH2(R) Sensitivity
CH1(L) CH2(R)
Digital I/O
Reference In Reference Out AES1 AES2 AES3 AES4 CH1 CH2
In Out
SDIF-2/DSD
75R
Clk
Remote
In
Out
MAINS FUSE 2A(T) ON OFF
PUSH PUSH
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)