1. Amplitude

1.1. Purpose

Find the maximum single or double amplitude in a signal.

1.2. Description

The maximum single amplitude for a signal \(x=x(k)\) is defined as

\[x_A^s = \max \left(x\left(k\right)-\bar{x}\right),\]

where \(\bar{x}\) denotes the mean value of \(x\).

1.2.1. Double amplitude

If the option Down crossing is used, the maximum double amplitude for a signal \(x=x(k)\) is defined as the largest difference between a local maximum and the preceding local minimum.

If the option Up and down crossing is used, the maximum double amplitude for a signal \(x=x(k)\) is defined as the largest difference between a local maximum and the preceding local minimum or between a local minimum and the preceding local maximum. This option will always give a larger maximum double amplitude than the option above.

1.3. Input

Any equidistant signal (see Signal Types ).

1.4. Output

The computed single or double amplitude is output as a single value for each input signal.