Aphex 141 - Manual (Page 3)

All the models have internal power supplies that are preset to a specific operating voltage. Make sure
that the unit is set to the proper voltage for your area before connecting to AC power.
Audio connections
Analog audio connections in the Models 141 and 142 are through TASCAM analog standard 25 pin
D-Sub. Both input on the Model 142 and output on the Model 141 are female D-Sub connectors on
the chassis. D-Sub connections are as follows:
Balanced inputs
The analog audio input stages in the Model 142 are balanced. They can be driven by either a
balanced or an unbalanced input. If unbalanced, connect the “Hot” to the “+” pin on the input
connector. Connect ground to the “G” pin and “ - “ pin. Maximum input level, balanced or unbalanced
is +24dBu.
Balanced outputs
The analog audio outputs of the Model 141 are impedance balanced. This is a true balanced circuit,
however audio signals appear only on the “+” connector pins. If driving a balanced input connect the
output pins “+” and “-” to the appropriate input connections. It is recommended that the ground be
connected only at the receiving end. If driving an unbalanced input connect “+” to the “hot” input and
connect “G” to the ground connection at the receiving end. You can leave the “-” unconnected or it
can be tied to ground. Maximum output level is +24dBu.
2.0 Installation and Interfacing
Rack Installation
All three models are 1.75” high (1RU), 8.25” wide and 7.25” deep. They can be rack mounted by
using the Aphex accessory # 44-008SA rack kit. One kit can be used to mount a pair of units or a
single unit in 1RU. Follow the instructions included with the rack kit for assembly.
Make sure that there is sufficient airflow around the units. Do not mount them directly on top of
equipment that generates excessive heat or near equipment that generates large magnetic hum
fields.
AC connections
Model 141 ADAT to Analog Converter
Model 142 Analog to ADAT Converter
Model 144 AES/ADAT Bi-directional Converter
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