what is an attenuator?
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From Wikipedia:\n"An attenuator is an electronic device that reduces the amplitude or power of a signal without appreciably distorting its waveform. Attenuators are usually passive devices made from resistors. The degree of attenuation may be fixed, continuously adjustable, or incrementally adjustable.\n\nFixed electrical attenuators are often called pads, especially in telephony. The input and output impedances of an electrical attenuator are usually matched to the impedances of the signal source and load, respectively."
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Short for modulator/demodulator. A communications device that converts one form of a signal to another that is suitable for transmission over communication circuits, typically from digital to analog and then from analog to digital.
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Background -- The Spectronic 20 is a spectrophotometer. A spectrophotometer measures the intensity of a light beam before and after it passes through a sample and compares these two intensities. The Spec 20 reports two types of measurements: percent transmittance and absorbance. Percent transmittance is the ratio of the intensity of the light passing through the sample to the intensity of the light shining on the sample multiplied by 100%. Absorbance is the log of the transmittance. The Spec 20 can measure absorbance and transmittance over a range of wavelengths. You must select a wavelength and calibrate the instrument at that wavelength before making any measurements.
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An isolation transformer is a one to one ratio transformer which is used to isolate equipment from the main power supply.  An isolation transformer provides a physical barrier between the primary winding and the secondary winding.  In single phase applications, this is often used for safety reasons (limiting available fault current, etc).  In three phase applications, this can also be used for power quality reasons (triplen harmonic mitigation), or to change winding configuration from delta to wye, wye to delta, etc.
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The radiation length for Al is 24 cm, for Pb 0.56 cm. To reduce the beam to 10% we need 2.3 radiation lengths, 55 cm of Al or 1.3 cm of Pb. \n\nNo idea how your  attenuation coefficients relate to my radiation lengths. A radiation length is the length of material needed to attenuate the beam by 1/e, that is to 0.368 of the original intensity.\n\nGood luck!
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http://www.netlimiter.com/\n\nThere you go.
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The repeater is just a box that has a built in bias tee to enable DC to pass up the RF cable to the active antenna. This gain overcomes long runs in Rf cable loss from the active antenna to the gps receiver, or the coupling loss of the distributed antenna
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You can download a download acclerator, a web acclerator or the Xlr8 technology program. These are free. I'm not sure where to get these but try searching for it.
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A damper restricts the flow, and can be adjusted to let more through or less through.\n\nA valve will be opened or closed.\n\nThink of it in the same fashion as in an air conditioning system
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There are dampers that are designed to dampen the vibrations in a mechanical system. A shock absorber on a car in a good example of this.\n\nThere are dampers that remove or lessen pressure surges in piping systems. Water hammer is an example of a pressure surge.\n\nFinally some types of valves are referred to as dampers. They are common in heating and air conditioning duct work.
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It also may be known as strain Gage.\n\nYou can use this device in place of pressure strips.
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The Receiver Factor is defined as a receiver's third order IMD intercept point, minus its noise figure. Thus, it neatly deals with the sensitivity/IMD tradeoff. Furthermore, both parts of the equation are "bandwidth invariant," so we don't have the bandwidth problems that plague so many other measurements. The shorter the bar, the better the tradeoff has been managed.
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An attenuator is used to reduce the level of a signal.  A single attenuator will not work the same with any load, because the input and output impedances of the attenuator should be matched to the characteristic impedances of the system in which it is used.\n\nOne of the simplest forms of attenuator is a resistive T or pi network, which is basically just an electronic "divider" circuit. If you know the attenuator resistor and output impedance values, you just apply Ohm's Law to calculate the input/output ratio.  There's a good example, with calculations required, at http://www.radio-electronics.com/info/circuits/resistor_attenuator/resistor_attenuator.php
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A link budget is the accounting of all of the gains and losses from the transmitter, through the medium (free space, cable, waveguide, fiber, etc.) to the receiver in a telecommunication system. It takes into account the attenuation of the transmitted signal due to propagation, as well as the loss, or gain, due to the antenna. Random attenuations such as fading are not taken into account in link budget calculations with the assumption that fading will be handled with diversity techniques.\n\nA simple link budget equation looks like this:\n\nReceived Power (dB) = Transmitted Power (dBm) - Losses (dB)
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rf modulator.\nhttp://www.radioshack.com/search/index.jsp?kwCatId=&kw=rf%20modulator
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A resonator is a device or system that exhibits resonance or resonant behavior. Many objects that use resonant effects are referred to simply as resonators. \nA distributed parameter resonator of the distributed network type has capacitance, inductance, and resistance which cannot be isolated into separate lumped capacitors, inductors, or resistors. The time factor of propagation of wave energy in the network is appreciable. Resonators can be of the dielectric type or magnetic type.\n\nA hollow conductor that uses resonance to amplify an electromagnetic wave is called a cavity resonator.\n\nIf you vibrate something at just the right frequency, you can get a big reaction.\nFor more please visit/click on the following link:\nhttp://www.exploratorium.edu/snacks/resonator.html
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From a data transmission standpoint, fiber optic performance is limited by attenuation and dispersion.  Attenuation is the loss of signal strength over distance; dispersion is the loss bandwidth due to the degradation of signal waveforms.