# 3.3.4. Frequencies File¶

The format of the frequencies file is as follows:

$$k_1 \;\;\;\;\; f_1$$
$$k_2 \;\;\;\;\; f_2$$
$$k_3 \;\;\;\;\; f_3$$
$$k_4 \;\;\;\;\; f_4$$
$$k_4 \;\;\;\;\; f_5$$
$$k_5 \;\;\;\;\; f_6$$
$$\;\;\;\;\;\;\vdots$$
$$k_{N-1} \; f_{N-1}$$
$$k_N \;\;\;\; f_N$$

where

• $$N$$ is the number of unique frequencies within the file

• $$k_i$$ defines the index value (1,2,….,N) for a particular frequency. Should be ordered 1 to N.

• $$f_i$$ is the frequency in Hz.

Below we see an example of a frequencies file which defines 7 unique frequencies.