CREATOR SPRO-CON9000 - Manual (Page 14)

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8 User’s Manual for SPRO Network Control Host Series
connection manner. Taking CON9000 as example,
the connection diagram is as follows:
2.3.4 Audio Port Instruction
Audio connection cable：
With regard to audio connection manner, there
are unbalanced and unbalanced connections.
The so-called balanced connection is a manner of
using two signal cables to transmit a pair of
balanced signal, as two cables are under the
same interference but opposite phase, as a result,
the interference is offset. As audio is in low
frequency range, it is easily to be interfered in
long-distance transmission. Therefore, as a
manner with strong anti-interference feature,
balanced connection is most common in audio
connection within profession devices. In the
wiring within household appliances, two-cord
shielded line is also used as audio cable, but it
transmits the left and right channels, which are
carrying two signals, so it doesn’t belong to the
category of balanced connection.
Unbalanced connection is a manner using one
signal cable to transmit signal. As easily to be
interfered, generally it is used in household
appliances
or some conditions with low
requirement.
Taking audio signal cable as example to illustrate
the specific connection:
1. Unbalanced connection: G pin to shield
(SLEEVE); + pin red line (TIP), - pin to G pin
2. Balanced connection: G pin to shield
(SLEEVE), - to black line (RING), + pin to red line
(TIP), illustrated as the following picture:
Above picture is the connection diagram of 5-pin
3.81 audio cable
Generally, the specific requirement of the port
determines what connection manner to use. Try
to use balanced connection as much as possible.
Please read the relevant instructions and
requirements in the Manual before connection. In
some cases, the device could be with one end in
balanced connection, but the other end is
unbalanced. If required not very strictly, balanced
connection is only required at the balanced end,
while unbalanced connection is only required at
the unbalanced end. Just make sure the pins are
corresponded. If required very strictly, switching
circuit is needed for switching the balanced to
unbalanced, or unbalanced to balanced.
USB
Computer
Con9000 Host