When a decibel value is computed by comparing a power value to 1 mW it is called as?(a) dBm(b) dBc(c) dB(d) DBThe question was asked in examination.This key question is from Gain, Attenuation & Decibels topic in chapter Fundamentals of Electronics of Avionics

When a decibel value is computed by comparing a power value to 1 mW it

1.	When a decibel value is computed by comparing a power value to 1 mW it is called as?(a) dBm(b) dBc(c) dB(d) DBThe question was asked in examination.This key question is from Gain, Attenuation & Decibels topic in chapter Fundamentals of Electronics of Avionics
Answer» Correct answer is (a) dBm Explanation: When the gain or attenuation of a circuit is expressed in DECIBELS, implicit is a comparison between two values, the output and the input. An often USED reference level in communication is 1 MW. When a decibel value is COMPUTED by comparing a power value to 1 mW, the result is a value called the dBm. It is computed with the STANDARD power decibel formula with 1 mW as the denominator of the ratio.

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When a decibel value is computed by comparing a power value to 1 mW it is called as?(a) dBm(b) dBc(c) dB(d) DBThe question was asked in examination.This key question is from Gain, Attenuation & Decibels topic in chapter Fundamentals of Electronics of Avionics

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