Digital Inputs And Outputs - Behringer ULTRAMATCH PRO SRC2496 User Manual

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ULTRAMATCH PRO SRC2496
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When using the XLR connectors in an unbalanced configuration, pins 1
and 3 on the connectors inserted must be interconnected!
mixing console
signal ow
subgroup output
tip
sleeve
shield
Fig. 5.1: Unbalanced transmission to the ULTRAMATCH PRO
ULTRAMATCH PRO
signal ow
analog input
2 1
3
shield
Fig. 5.2: Unbalanced transmission from the ULTRAMATCH PRO

5.3 Digital inputs and outputs

5.3.1 Balanced XLR connection
The digital XLR inputs and outputs are not bound by the AES/EBU protocol. They accept
and deliver data streams in both the professional and the consumer format. Should the
RCA input already be occupied by another device, it is even possible to connect the RCA
output of, say, a CD player to the ULTRAMATCH PRO XLR input by using an adapter.
To do this, you will need a cable such as the one shown in fig. 5.2, except that
instead of a female XLR connector, a plug must be mounted.
The following figure illustrates how to correctly connect the balanced input
and output connectors. Basically, it is the same wiring scheme normally used
for balanced audio connections such as, for example, the connection between a
microphone and a mixing console.
device A output signal ow
2 1
3
shield
Fig. 5.3: Connecting the ULTRAMATCH PRO in a balanced configuration
Selecting the correct cable is not critical. For distances of less than 20 m,
generally available microphone cables have no negative effect. For greater
distances or higher requirements (mobile operation, powerful high-frequency
fields), however, you should use special 110-Ohm cable with double shielding.
5.3.2 Unbalanced coaxial RCA connection
The RCA inputs and outputs, in turn, are not bound to the S/PDIF format. They accept
and deliver data streams in both the professional and the consumer format. It is
even possible to connect the XLR output (e.g. from the BEHRINGER ULTRA-CURVE
PRO DSP8024 or other equipment) to the RCA input on the ULTRAMATCH PRO by
using an adapter. Whether or not the reverse will work, namely connecting the
ULTRAMATCH PRO's RCA connector to the XLR input of another unit, depends on
the sensitivity of the XLR input in question.
The following figure illustrates the correct connection for unbalanced input and
output connections via RCA plugs.
ULTRAMATCH PRO
analog input
1 2
3
device A input
hi- ampli er
tip
sleeve
ULTRAMATCH PRO
input
1 2
3
signal ow
device A output
tip
sleeve
shield
Fig. 5.4: Connecting the ULTRAMATCH PRO in an unbalanced configuration
Basically, it is the same wiring scheme as is the norm for unbalanced audio
connections in hi-fi systems, e.g. between a CD player and amplifier.
For distances less than 10 m, standard coaxial line cable has no negative
influence. However, should greater distances be involved, you should use XLR.
5.3.3 Optical connection
Toslink optical inputs and outputs are also not bound by the S/PDIF format.
They accept and deliver data streams in both the professional and the consumer
format. Optical connections are by nature not sensitive to electric interference
fields, easy to cable and astonishingly robust.
The following figure illustrates how to correctly connect the optical input and
output connections.
device A
signal ow
optical output
Fig. 5.5: Connecting the ULTRAMATCH PRO optically via Toslink
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For many consumer devices the consumer format at the optical input is
an absolute necessity, otherwise they do not accept the signal.
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The ULTRAMATCH PRO does not support the ADAT multi-track format,
which can thus neither be looped through nor converted. (ADAT is a
registered trademark of the Alesis Corporation)
5.3.4 Wordclock
Feeding a wordclock signal into the rear BNC connector enables external
synchronization of the ULTRAMATCH PRO. Wordclock signals are normally
distributed in a network configuration, i.e. are relayed and terminated
with 75-Ohm coaxial cable, BNC-T adapters and terminating resistors.
Commercially available BNC cables are usually used as connecting cables.
In order to offer maximum flexibility, the ULTRAMATCH PRO's BNC input
has a high-impedance design and is not equipped with an internal 75-Ohm
terminating resistor. Should the ULTRAMATCH PRO be the last device in the signal
chain, however, it is necessary to put a T-connector into the BNC connector.
A 75-Ohm terminating resistor (in the form of a short BNC plug) goes on one end
of the T-connector and the BNC cable from the "master" delivering the wordclock
signal on the other end.
The following figure shows how to correctly connect the unbalanced
wordclock input. The wiring scheme is the same as is used for networking in
computer technology and you can thus obtain the appropriate accessories
(commercially available cable, T-connectors, terminating resistors) in specialist
computer shops.
ULTRAMATCH PRO
input
tip
sleeve
ULTRAMATCH PRO
optical input