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7.14

Insertion loss

The insertion loss is a criterium for the effectivity of interference suppression components, as

measured by using a standardized measurement circuit (fig. 12).

Fig. 12

Definition of insertion loss

The input terminals of the equipment under test are connected to an RF generator with impedance

Z (usually 50

Ω) . At the output end of the component, the voltage is measured using a selective

voltmeter having the same impedance

Z. The insertion loss is then calculated from the quotient of

the no-load generator voltage

Insertion loss measurement

Reference measurement

General Technical Information