6
AES-3981 Installation and Operation Manual
Preliminary—Contents are proprietary and confidential. Do not photocopy or distribute.
Chapter 1: Introduction
Back Connector Module
The back modules provide the interface between the main module and
the signal cables. The coaxial back module contains one looping BNC
input and 8 BNC outputs. The balanced back module provides an input,
which is either terminated or looping, selectable via a back module
jumper. The one input and the eight outputs are transformer coupled,
with connectors being removable terminal strips.
In the NEO frame, the AES-3981 back connector module is placed
directly behind the front module, facing the rear. The AES-3981
supports either a coaxial interface or a balanced interface back module.
The balanced back module features 110
Ω
output impedance with a
jumper-selectable looping or 110
Ω
-terminated input.
The input on the
AES-3981-B is bridging and may be used as such; however, we
recommend that the input be terminated with the back module
jumper for proper input return loss specification.
Figure 1-2
illustrates balanced back module connections.
The coaxial back module features 75
Ω
output impedance and a looping
input.
The input on the AES-3981-C is high impedance (looping)
and may be used as such; however, we recommend that the input be
terminated with a 75
Ω
termination for proper input return loss
specification.
Figure 1-3
illustrates coaxial back module connections.
Figure 1-2.
AES-3981-B (Balanced) Back Module
Figure 1-3.
AES-3981-C (Coaxial) Back Module
Summary of Contents for AES-3981
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