edited body; edited title

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edited Mar 5, 2022 at 21:20

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Is the meaning of a Decibeldecibel different when applied to Voltagevoltage vs Wattswatts?

If I have an amplifier that provides +3dB, or an attenuator that provides -20dB, then how do I know if that applies to Voltagevoltage or power?

In other words, if I have a 0dBV signal and I run it though a +3dB amplifier, do I get 3dBV?

Similarly, if I have a 0dBm signal and it runs through +3dB amplifier, do I get a 3dBm signal?

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occurred Mar 13, 2015 at 21:24

Restore the original intent of the question

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edited Mar 13, 2015 at 20:15

Cuadue

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Do decibels scale by voltage or power Is the meaning of a Decibel different when applied to Voltage vs Watts?

Made title less emotive and more specific. For example the comment on the question talks about references, so has clearly missed the point of what OP was asking.

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edit approved Mar 13, 2015 at 19:23

Level River St

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Are Decibels Inherently Ambiguous Do decibels scale by voltage or power?

added tag the character limit is dumb

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edit approved Mar 13, 2015 at 18:15

ACD

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asked Mar 13, 2015 at 17:44

Cuadue

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Is the meaning of a Decibeldecibel different when applied to Voltagevoltage vs Wattswatts?

Is the meaning of a Decibel different when applied to Voltage vs Watts?

Is the meaning of a decibel different when applied to voltage vs watts?

Do decibels scale by voltage or power Is the meaning of a Decibel different when applied to Voltage vs Watts?

Are Decibels Inherently Ambiguous Do decibels scale by voltage or power?