News tagged with analog signals

TV channel squeeze proposed to pay for tax cuts

(AP) -- Call it the Great Channel Squeeze.

Technology / Telecom

created Dec 16, 2011 | popularity not rated yet | comments 0

Wireless 'breadcrumbs' that won’t become toast when baked... or soggy when hosed

When Hansel and Gretel ventured into the forest, they left a trail of breadcrumbs to find their way home. In today's world, cellular phones, Global Positioning System (GPS), WiFi, and Bluetooth are the digital ...

Technology / Engineering

created Jun 16, 2011 | popularity not rated yet | comments 0

Toshiba's new technology cuts phase noise in oscillation ICs for wireless communication

Toshiba Corporation today announced that it has developed noise reduction technology that reduces jitter in radio-frequency signals, cutting phase noise by up to 90 percent. This breakthrough opens the way for a further migration ...

Technology / Semiconductors

created Jun 16, 2011 | popularity 5 / 5 (2) | comments 0

Don't change that channel: DTV woes still abound

(AP) -- Think the digital TV transition is over? Not quite. Many viewers have found that they can't pick up certain stations after the switch, even with the right TVs or converter boxes. The stations are still trying to ...

Technology / Telecom

created Sep 18, 2009 | popularity not rated yet | comments 2

Reception problems linger after DTV transition

(AP) -- The shutdown of U.S. analog TV service on Friday appears to have gone relatively smoothly, but as expected, a lot of viewers are having problems getting the stations they want.

Technology / Telecom

created Jun 17, 2009 | popularity not rated yet | comments 0

700,000 callers phone digital TV hot line

(AP) -- Nearly 700,000 calls were received by a federal hot line this week from people confused about the nationwide switch from analog to digital TV broadcasts that occurred Friday.

Technology / Telecom

created Jun 13, 2009 | popularity 2.7 / 5 (3) | comments 2

Friday is final curtain for analog TV signals

(AP) -- The last major TV stations that are still broadcasting in analog will turn those signals off Friday and go all digital. And this time, they really mean it.

Technology / Telecom

created Jun 10, 2009 | popularity 4 / 5 (4) | comments 5

U-verse offers TV alternative and more

OK, I admit it. When I am asked to test questionable software, I usually install it first on my wife's computer. And my kids are crash-test dummies ramming head-first into all sorts of dubious products. But they don't care ...

Technology / Telecom

created May 27, 2009 | popularity 3 / 5 (1) | comments 2

Analog TV signals to be interrupted in 'soft test'

(AP) -- TV stations around the country will replace their analog broadcasts for a few minutes Thursday with reminders that those broadcasts will disappear completely in three weeks.

Technology / Telecom

created May 20, 2009 | popularity not rated yet | comments 0

Another 158 TV stations to kill analog early

(AP) -- Regulators have cleared 158 TV stations around the country to shut down their analog broadcast signals before June 12, when the remaining full-power stations will end theirs.

Technology / Telecom

created Mar 18, 2009 | popularity 3 / 5 (1) | comments 0

Digital TV likes clear signal path

Question: If I buy a new digital TV, can I just plug it in and use it, as I do the old TV now? My son insists that it has to be hooked to an antenna, but the old televisions worked fine without one.

Technology / Telecom

created Dec 31, 2008 | popularity 1.3 / 5 (3) | comments 1

Analog signal

An Analog or analogue signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other time varying quantity, i.e analogous to another time varying signal. It differs from a digital signal in that small fluctuations in the signal are meaningful. Analog is usually thought of in an electrical context; however, mechanical, pneumatic, hydraulic, and other systems may also convey analog signals.

An analog signal uses some property of the medium to convey the signal's information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. Electrically, the property most commonly used is voltage followed closely by frequency, current, and charge.

Any information may be conveyed by an analog signal; often such a signal is a measured response to changes in physical phenomena, such as sound, light, temperature, position, or pressure, and is achieved using a transducer.

For example, in sound recording, fluctuations in air pressure (that is to say, sound) strike the diaphragm of a microphone which causes corresponding fluctuations in a voltage or the current in an electric circuit. The voltage or the current is said to be an "analog" of the sound.

Any measured analog signal must theoretically have noise and a finite slew rate. Therefore, both analog and digital systems are subject to limitations in resolution and bandwidth. In practice, as analog systems become more complex, effects such as non-linearity and noise ultimately degrade analog resolution to such extent that the performance of digital systems may surpass it. In analog systems, it is difficult to detect when such degradation occurs. However, in digital systems, degradation can not only be detected but corrected as well.

For more information about Analog signal, read the full article at Wikipedia.
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