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dBm power measurement with reference assumption
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Q. The value of dBm in power measurement is estimated by assuming the reference ,which is equal to ________
- Published on 23 Sep 15
a.
1mW
b.
10mW
c.
1/10 mW
d.
1/100 mW
ANSWER: 1mW
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Discussion
Satyawati
-Posted on 29 Sep 15
Basically,the Decibel (dB) is a logarithmic unit which is used to express the gain of audio frequency amplifiers. This is so because the response of a human ear to the sound intensity exhibits logarithmic nature.
Apart from this, dBm is a unit which is frequently used in power measurement. dBm refers to the dB value which is estimated by assumption of a reference whose value is equal to 1mW.
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