UDA-2102 AES/EBU DIGITAL AUDIO DISTRIBUTION AMPLIFIER
GENERAL:
The UDA-2102 is a 1 input x 6 output AES/EBU Digital Audio Distribution Amplifier. The distribution amplifier input
is a transformer coupled three pin screw terminal. Electrical specifications conform to audio industry standard AES3-
1992. The input signal range is 2 to 7 Vp-p at 110
Ω
impedance. The module is designed for applications where cable
lengths are 500 feet (153 meters) or less of Belden 1800A or equivalent AES/EBU Digital Audio cable. Signal source
quality will effect this typical distance. The module has a jumper to select either AC or DC coupling for the shield to
digital ground. AC coupling the shield may reduce high frequency emissions.
The UDA-2102 has six balanced transformer coupled digital audio outputs. Each output on a detachable three pin
screw terminal. The outputs are 4Vp-p AES3-1992 standard signals at 110
Ω
impedance. Sampling frequency rates are
provided in the specifications section of the manual.
POWER:
The UDA-2102 operates from bus voltage of unreg20 VDC. This voltage is supplied by the Sigma frame.
The module regulates the bus voltage to +5 VDC via regulator U3. Circuit protection is provided by RT1. This PTC
Thermistor (Positive Temperature Coefficient Thermal Resistors) serves as a permanent, self resetting, fuse device. In
the event of excessive current draw the PTC on the line will open. Upon correction of the fault, the PTC Thermistor will
cool to an operational temperature and reset.
FRAMES:
The UDA-2102 module can reside in any of four (4) different frames provided by Sigma Electronics, Inc. If this
module is purchased as a component of a system, please refer to the SERIES 2100 FRAMES Instruction Manual. If the
module was purchased separately, a preexisting frame must be present for proper operation. Sigma would like to
emphasize the fact that any of the Series 2100 modules can be installed with any other Series 2100 module within the
Series 2100 frames.
The SS-2100-2 frame is also designed for desk-top applications. This frame provides two (2) positions for two
single slot modules or a single two slot module. An optional tray (RMT-2100-2A) is available for rack installations.
The SS-2100-6 frame is designed for 19 inch EIA rack installations. It provides six (6) slots for modules in 1 RU.
The SS-2100-12 frame provides a redundant power supply in a 3 RU frame for 19 inch EIA rack installations. This
frame has twelve (12) slot positions for modules.
The SS-2100-16 frame is also available for installations in a 19 inch EIA rack. This frame provides sixteen (16)
slots for module within 3 RU.
Additional information on the various frames is available. Please refer to the special section on frames if this was
purchased as a complete system. If this information is not provided with this shipment, contact Sigma Electronics for
assistance.
The UDA-2102 can be purchased in a stand-alone unit as UDA-26.
CONNECTIONS:
Wiring to the module is performed via the connectors located on the rear panel. Detachable 3 pin screw terminals
are used for the input and six outputs. This allows each output connector to be detached for wiring without interruption
to the destination equipment of the other outputs. The unused outputs do not require a load.
REAR PANEL CONNECTIONS
Figure 1
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