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signal
(redirected from Signal system)

   Also found in: Medical, Legal, Financial, Wikipedia, Hutchinson 0.04 sec.

signal

Any electrical or light pulse or frequency whether in a wire or fiber or wireless. The term is somewhat generic and may refer to virtually anything that is generated and transmitted (power, data, control signals). Although the term may be used by itself later on in a description or article, it is often used at least initially with another word, such as "carrier signal," "data signal" or "control signal." See signal-to-noise ratio and control signal.

Signal Vs. Signaling
A "signal" can refer to a data signal or a control signal, but "signaling" refers to transmitting only control signals. It is very common to hear the term in the telecom industry, where "signaling" means setting up and breaking down a call, but does not refer to the actual pulses or frequencies of the data (voice, text, etc.) itself (see SS7 and signaling).


signal [′sig·nəl]
(communications)
A visual, aural, or other indication used to convey information.
The intelligence, message, or effect to be conveyed over a communication system.

1.(language)SIGNAL - A synchronous language by Le Guernic et al of INRIA.

["SIGNAL - A Data Flow-Oriented Language for Signal Processing," P. le Guernic, IEEE Trans Acoustics Speech & Signal Proc, ASSP-34(2):362-1986-04-374].
2.(operating system)signal - A predefined message sent between two Unix processes or from the kernel to a process. Signals communicate the occurrence of unexpected external events such as the forced termination of a process by the user. Each signal has a unique number associated with it and each process has a signal handler set for each signal. Signals can be sent using the kill system call.


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Ponziani claims his Intelliturn system provides higher quality at a lower cost, and with greater design flexibility than a conventional turn signal system.
RoofGuard is a motion-sensing alert system that is installed at the highest point of a rooftop stairwell, detecting unauthorized passage and immediately relaying a location-specific alarm using the Quick Signal system.
The Bi-Trans Signal system, similar to variations of highly technical traffic control systems that now are becoming commonplace in urban areas, automatically resets the timing of stoplights and left-turn signals according to the traffic volume, officials said.
 
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