Formula 1

natural frequency of a materiel component such as a circuit board) and, for laboratory testing purposes, define the lowest frequency of interest as $f_{\min }<f_{1} / 2$ ( i.

$$f_{\min }<f_{1} / 2$$

Formula 2

The maximax SRS is to be computed over the long time duration and over the frequency range from $f_{\min }$ to $f_{\mathrm{SRS} \max .}>1.1 f_{\max }$.

$$f_{\mathrm{SRS} \max .}>1.1 f_{\max }$$