>@9
Multitone Audio Test System
User Manual
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V
3.32
Mains Cable
The enclosed mains power cable has an unconnected end with three colored leads, which
correspond to
Brown
=
Live
(AC)
Blue
=
Ground
Yellow/Green
=
Earth
Attach a mains plug to the cable that fits the receptacles of your country.
IEEE Connection
The
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system provides an IEEE-488 interface (standard design interface for
programmable instrumentation) which is connected to the IEEE bus using a standard IEEE-
488 interface cable from the rear panel illustrated in
Fig. 2
.
With the IEEE interface bus, up to 31 instruments can
be interconnected. The cables have identical piggy-
back connectors on each end so that several cables
can be connected in virtually any configuration. There
must be, of course, a path from the computer to every
device operating on the bus.
As a practical matter, avoid stacking of more than
three or four cables to a single connector. If the stack
gets too long, any force on the stack can damage the
connector mounting. Be sure that each connector is
firmly screwed in place.
IEEE Address Selection
Each IEEE device has at least one talk and listen address (unless totally transparent or a
talk or listen only device). The address of the
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can be adjusted with the DIP switch at
the rear panel of the instrument (see
Fig. 2
). Each switch position has a number printed
underneath. The resulting IEEE address is the sum of all numbers, where the switch is in
position “1“. The above illustrated example has an address selection of 3, since switch 1 and
switch 2 are in position "1". The five switches allow the selection of any address in the range
from "1" to "31" inclusively.
Audio Connection
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features balanced and unbalanced BNC and 4mm banana connectors for both inputs
and outputs. Balanced connections enhance the noise and hum immunity and are always
recommended for measurement purposes.
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can also handle unbalanced signals.
Unbalanced signals normally have one hot signal
against chassis ground. For this reason unbalanced
connections are recommended for short connections
only (less than 1m / 3 feet) or in a relatively noise-free
environment.
You may use either the set of front connectors with two
inputs & outputs or the equivalent set of connectors at
the rear panel of the instrument.
Caution:
Do not connect both front and rear panel connectors at the same time
since this may result in signal mismatching.
Fig. 2 IEEE Connector
Fig. 3 Front Connectors
