6
AUDIO CONNECTIONS
Analogue Inputs
The inputs and outputs to the DC2496 are electronically balanced and would
normally be connected to your system via a patchbay. Should unbalanced
operation be required, simply ground pin 3 on the XLR connectors.
If earth loop hum problems are encountered, do not disconnect the mains
earth but instead, try disconnecting one end of the signal screen on the
cables connecting the DC2496 to the patchbay. If such measures are
necessary, balanced operation is recommended.
AES/EBU
Is via an XLR connector designed to be used with standard balanced
microphone cable (20 metres maximum), wired pin 1 screen, pin 2 and 3
balanced data, and the XLR shell connected to the chassis. Having many
short cables joined together is not advisable as each connector can cause
undesirable signal reflections.
The output socket fully conforms to the EMC standards; if the unit is to be
used where it may be exposed to high levels of disturbance, such as found
close to a TV or radio transmitter, it is suggested that the screen of the data
cable be connected to the chassis connection on the XLR type connector
rather than to pin 1.
If ground loop problems are encountered, never disconnect the mains ground,
but instead, try disconnecting the signal screen on one end of each cable
connecting the outputs.
S/PDIF
Is via a high quality RCA type phono jack where the data conforms to the
Sony
J
Phillips
J
Digital InterFace format. Because this connector only
provides an unbalanced termination, the recommended maximum length
for this cable is 3 metres, even with very high quality cable.
Word Clock
For external clock synchronisation or when the DC2496 is providing the clock
to another source, this is carried out via the 50
Ω
BNC connector.
ADAT
Connect via an Optical Cable (Light Pipe) with a maximum recommended
length of three metres. The cable supports 8 channels at a 24 Bit word
resolution. The Drawmer DC2496 provides seperate ADAT input and output
as standard.
TDIF
Is via a 25 pin D connector. This is a unique cross-wired cable, supplied by
Tascam. It has 8 inputs, 8 outputs all at 24 Bit word resolution as well as
TDIF word clock in and out all in the one connector. The maximum
recommended length is three metres.
Note: When the TDIF D plug is inserted the main BNC Word Clock out is
shifted by 90 degrees fot TDIF use only.
INSTALLATION PRECAUTIONS
Should a fuse blow, replace it only with the same type and value as the one
fitted.
When installing the DC2496, ensure that it is allowed sufficient ventilation
and avoid mounting it next to excessively hot pieces of equipment or devices
emitting a strong magnetic field such as is often the case with power
amplifiers. If the unit is to be used in a mobile situation, it is strongly
recommended that the rear of the unit is supported in the carrying rack to
avoid bending the front panel rack mounting ‘ears’.
Should the unit require cleaning, use a damp cloth with a little liquid detergent;
do not use thinners or spirit cleaners as these may attack the finish.
Chapter
1
DC2496 HI RES A/D CONVERTER
