zaterdag 22 november 2014

Measurement of attenuattion

At the top of the Blog, I have changed my Page List by adding a page on
(Click) measuring the attenuation of an attenuator.

After building an attenuator, the attenuation can be easily and accurately measured with a DC voltage.  Voltages can meausred accurately with a digital voltmeter.

Measure the attenuation with a DC voltage








Example calculation
V1 is adusted to to 3.2 V.
V2 is measured as 0.99 V
A (dB) = 20 * log (V2 / V1) = 20 * log ( 0.99 / 3.2)
A (dB) = 20 * log (0.309) = 20 * 0.5095 = -10.19 dB
These values were measured for a 10 dB attenuator.

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