WebLong coax cable: Loss 3 dB attenuation (reduction to half the level) High power 10 watt amplifier: Gain=30 dB (increase in signal level by a factor of 1000 times. Note the 3 zeros = 30 dB) Calculation: Output = -30 + 16 -10 - 3 + 30 = 3 dBW = 2 watts. Comment: This should work, but note that if the adjustable attenuator were to be turned to its ... The decibel is useful for representing large ratios and for simplifying representation of multiplicative effects, such as attenuation from multiple sources along a signal chain. Its application in systems with additive effects is less intuitive, such as in the combined sound pressure level of two machines operating together. Care is also necessary with decibels directly in fractions and with the units of multiplicative operations.
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