(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|
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.