digital and electronics signal
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Well... that's kind of a broad question, but here's the basics both signals. \n\nDigital Signal\n----------------------------\nA digital signal is like an electronic representation of bianary.  it has 2 states, high and low.  It depends on the logic being used (CMOS, TTL, or ECL), but the lows can run anywhere from -5.2 VDC in ECL Logic, and the highs up to +5.2VDC in TTL Logic.  in the o'scope, all you will see looks a little like:\n_-_--____--_--__--_--_____-__-----_       <==== where you can see definate highs and lows.\n\n__--__--__--__--__--__--__--__--__--__ <== A typical digital clocking signal, like in your computer\n\nAnalog Signal\n------------------------\nAn analog signal is like what you see in your windows media player when you turn on the o'scope visualisation (do it, it's a good example of an analog signal).  The pure definition of an analog signal is a variable signal that is continuous in both time and amplitude.  It could be a perfect Sine, triangle, square, or sawtooth Wave ( http://en.wikipedia.org/wiki/Image:Waveforms.png ), a straight DC level, or what you see in the Media Player Example.
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try an oscilliscope.  compare the input to output.\n\nif you have the right scope it will provide distortion values...\n\nyou will certainly see the signal degradation.\n\nof course th efirst question is - why would you run VGA for 100'?  Try an IP KVM - avocent.com works...
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Capacitive reactance.\n\nThere are other items which use this, such as elevator buttons, touchscreens etc.
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The Electronic Universe
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newark electronics\nwww.newark.com
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Here is a good article. To understand them, you need to get a multimeter, and electronics projects book, a breadboard (to mount circuits on), and a selection of electronic parts from Radio Shack. Use batteries initially, and then when you are more confident a power supply and rectifier to do experiments, and measure voltage, current, and resistance values around the circuit.\nhttp://en.wikipedia.org/wiki/Electronics\nHyperphysics. (Google)\nhttp://www.mathworld.wolfram.com\nhttp://www.refdesk.com\n"You can do it electronics," Needham Heights, MA\nEnjoy!
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none they work eccentrically in the down phase
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It depends on the application.\nDr. Boye's requirement for the VCO was that it produced 5 distinct types of audio signal waveforms: square, sawtooth, triangle, sine and a pulsed sine wave that had a duty cycle of 3 seconds on and 3 seconds off. \nhttp://www.phy.davidson.edu/instrumentation/VCO.htm
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visit \nwww.ciit.edu.pk \n\ngud info for BS electronics
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Try pa powerport. Lots of links ther regarding Pa
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digital design.\nor communications.\n\nprepare for alot of electrical.
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Go here for an automatic HJT analysis:\nhttp://hjt.networktechs.com/
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Buy a signal booster for your modem or router.
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Go for the Digitech.  They are quality products if they have the effects you want.
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.01uF / 1210/ 50v/ avx /digikey.com/\nMIKE
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http://news.bbc.co.uk/1/hi/technology/4639782.stm
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this might prove to be useful:\nhttp://islab.oregonstate.edu/koc/ece575/02Project/Mor/