B
Balanced line
Bathtub Curve
Bel
Beltpack
Binaural
Biscuit
Bit
Block Diagram /
Single Line
Diagram
Blocking
A balanced two conductor line carries audio that is differentially driven and balanced to ground. Neither conductor is tied to circuit common. Circuit common is either tied to a transformer center tap, or is an electrical center point, or not tied at all. The signal (with respect to ground) on one conductor is equal and 180° out of phase with the other conductor. Balance Adjustment or Control In stereo audio, an adjustment to balance the left channel versus right channel. At RTS™ Systems a name given to the null adjustment control. The null adjustment or balance control is used in two lines of products: user stations and interfaces — two to
A curve showing failure rate versus elapsed time. Typically this curve is bathtub shaped. Initially a high failure rate occurs when active and passive parts fail (“infant mortality”). The parts fail under initial
Originally a unit of measurement that meant that a sound was twice as loud. A more convenient unit for other reasons is a decibel, which is a tenth of a bel. Therefore an increase of 10 decibels is twice as loud (and a decrease of 10 decibels is half as loud). Mathematically a unit that represents the logarithm of the ratio of two powers. See also decibel.
Portable headset user station. This station is designed to be worn on a user’s belt, but is also fastened to the underside of consoles, taped to a structure near the user, or mounted on a piece of equipment.
1.A special process of using an artificial head and two microphones to closely emulate the spatial and frequency hearing of a human. 2. Two earphones, two signals, may be stereo or may be two different signals.
A portable speaker station.
Binary Digit. One eighth of a byte. One eighth of a dollar.
A diagram to show the basic concepts of a device or system. Often the block diagram has system parameters such as transfer functions, gain, loss, level, DC voltage, inputs, outputs, and so on. I.) Block Diagrams are used on the Product Data Sheet to clarify the functions, show performance capabilities, and to show the input, output, control, and interconnection points. This diagram also defines and clarifies the specifications called out on the data sheet. II.) The diagrams called Block Diagrams are often, in fact, “Single Line Diagrams”. Single Line Diagrams are similar to the Block Diagrams but show more detail such as number of conductors in a cable, connector designations, connector details such as male/female, Equipment Model Numbers, and Equipment Designation Names/Numbers. At RTS™ Systems, these single line diagrams are called “System Block Diagrams” and are used for several purposes: 1. Act as a check list against the customer requirements. 2. Demonstrate to the customer the meeting of the customer’s requirements. 3. Are used to develop the equipment list (Lists the Quantities and Models numbers of equipment required to make the system). 4. Provide the information necessary to perform a system test. 5. Provide information to estimate wire and cable requirements. 6. Provide information to aid installation at the customer site. (Wiring Diagrams and Wire List can be generated from this information). 7. Graphically give a measure of the size and complexity of a given communications system. 8. Provide a means of troubleshooting system problems during commissioning, during operation, and during maintenance. 9. Provide a documentation basis to expand the system in the future. 10. Provide documentation for telephone support of the customer from the factory.
A communication system blocks a requested call or access usually by a busy signal.
