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In telecommunications, a balanced line or balanced signal pair is a transmission line consisting of two conductors in the presence of ground, which relies on balanced impedances to minimize interference. The signals on each line are typically the inverse of one another. BlackBerry 7100t Telecommunication refers to the communication of information at a distance. ...
A transmission line is the material medium or structure that forms all or part of a path from one place to another for directing the transmission of energy, such as electromagnetic waves or acoustic waves, as well as electric power transmission. ...
Ground symbols The term ground or earth usually means a common return path in electrical circuits. ...
In electrical engineering, Impedance is a measure of opposition to a sinusoidal electric current. ...
The conductors are sometimes carefully twisted together to ensure that each conductor is equally exposed to any external magnetic fields that would induce unwanted noise.
The line is capable of being operated in such a way that when the impedances of the two conductors at all transverse planes are equal in magnitude and opposite in polarity with respect to ground, the currents in the two conductors are equal in magnitude and opposite in direction.
Balanced lines can carry electrical signals farther than unbalanced lines because any noise on the line will not be balanced and thus gets filtered out. Unbalanced line has two common, unrelated meanings in different fields: In American football, an unbalanced line is an offensive line in which more linemen are one side of the ball than the other; see also Glossary of American football. ...
For this reason, balanced lines sometimes do not have electrical shielding on the wires. Electromagnetic shielding is the process of limiting the coupling of an electromagnetic field between two locations. ...
A "balanced" cable can be used in an unbalanced system (the cable itself is not balanced, the complete system is). The opposite is not true.
Operation As an example: a microphone connected to a mixer. A microphone, sometimes called a mic (pronounced mike), is a transducer that converts sound into an electrical signal. ...
A typical professional microphone has 3 pins on the XLR connector: "hot", "cold", and shield. The hot wire has the signal from the microphone (let's call it S). The cold wire has the opposite (inverted) signal (let's call it −S). (This is usually achieved with a transformer inside the microphone). The 2 wires are twisted together very closely, so any noise (let's call it N) induced on the cable affects each of the 2 wires equally. So we would have S+N on the hot wire, and −S+N on the cold wire. On the receiving end (often a mixing console) there is an operational amplifier which subtracts cold from hot: (S+N) − (−S+N) = 2S. So at the end, you have 2S gain (twice the signal, or 6 dB), and the noise has been canceled out. The XLR connector is a rugged electrical connector design. ...
Three-phase pole-mounted step-down transformer. ...
BBC Local Radio Mark III radio mixing desk In professional audio, a mixing console, mixing desk (Brit. ...
A 741 operational amplifier in a TO-5 metal can package An operational amplifier, often referred to as an op-amp, is a DC-coupled electronic differential voltage amplifier, usually of very high gain, with one inverting and one non-inverting input. ...
The decibel (dB) is a measure of the ratio between two quantities, and is used in a wide variety of measurements in acoustics, physics and electronics. ...
Examples Unshielded Twisted Pair Unshielded twisted pair (UTP) cabling is the most common cable used in computer networking. ...
Category 5 cable, commonly known as Cat 5, is an unshielded twisted pair cable type designed for high signal integrity. ...
Low voltage differential signaling, or LVDS, is an electrical signalling system that can run at very high speeds over cheap, twisted-pair copper cables. ...
Left: 20-way grey ribbon cable with wire no. ...
A microphone, sometimes called a mic (pronounced mike), is a transducer that converts sound into an electrical signal. ...
Baluns To convert a signal from balanced to unbalanced requires a balun. For example, baluns can be used to send line level audio (which is unbalanced) over 300 feet of CAT5 cable by using a pair of baluns at each end of the CAT5 run. The balun takes the unbalanced signal, and creates a negated copy of that signal, and sends these 2 signals across the CAT5 cable as a balanced signal. A balun is a device designed to convert between balanced and unbalanced electrical signals, such as between coaxial cable and ladder line. ...
A balun is a device designed to convert between balanced and unbalanced electrical signals, such as between coaxial cable and ladder line. ...
See also Balanced audio connections are extremely important in sound recording and production because they allow for the use of very long cables with reduced introduction of outside noise. ...
In effects processing and sound reinforcement, an insert is a tip-ring-sleeve connector on the back of a sound board, used for creating a loop through an effects processor. ...
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