Avlink BAX-3088 - Manual (Page 11)

BAX Matrix Switching Systems—User Manual
10
Balanced connection is a connection method of using two signal wires to transmit a pair of
balanced signals. Since interference to two signal wires are similar and out of phase the
interfering signals are cancel out.The lower audio frequencies are susceptible to interference in
long distrance transmission. Therefore, balanced connection is a way to counter interference
commonly used in professional audio equipment. In household appliances, two-wire cable with
sleeve is sometimes used. However, they are used for the left and right audio signal channels and
do not belong to balanced connection.
Unbalanced connection uses only one signal cable for connection is susceptible to
interference. Most household appliances and not-so-demanding audio equipment uses
unbalanced connection.
A specific connection of the audio signal cable is given below:
1. Unbalanced connection: The “G” leg connects to the Sleeve, and the “+” leg connected to
the red wire (TIP) while the “-“ leg connects to the “G” leg.
2. Balanced connection: The “G” leg connects to the Sleeve, and the “-“ leg connects to the
black wire (RING) while the “+” leg connects to the red wire (TIP). Refer to Figure 5-3 below:
Figure 5-3 5-Phase 3.8mm Audio Connecting Socket Cable（Balanced/Unbalanced Connection）
To select balanced or unbablanced connection is often depended on the connectors of the
equipment. Use balanced connection as far as possible. Refer to the User Manual prior to
connection. Occasionally, you will have to connect balanced connectors of one piece of
equipment to unbalanced connectors of another equipment. In most cases, you can use
unbalanced connection at the balanced end if quality is not so demanding. If you are demanding
for audio quality, you must use a balun to convert a signal from balanced to unbalanced, or vice
versa.
5.0.2 BAX Matrix System and Control Computer Connection
Use the RS-232 connecting cable to connect the computer serial port (COM1 or COM2) to
the RS-232 communication port of the BAX matrix host. The computer can then be used to
control the BAX matrix after installation of application software.
Figure 5-4 BAX Matrix and Computer Connection