Signal generator |
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If you need to generate artificial signal by using some standard mathematical function, use *Signal
tools/Signal generator* option from the menu or toolbar button. You can choose the type of
the function (sine, step, white noise, ), signal length, frequency, sample rate, min & max values... *SIGVIEW *will allow only input of values which make sense for the chosen signal type (for
example there is no frequency for a white noise signal) and disable all other fields.

After you set all signal parameters, click OK and a window with defined signal will be created.
You can work with this signal as with any other signal or you can save it in a file for later use. If
you would like to use this signal for sound output, simply choose *Play&navigate /Play signal (with
sound)* option from the main menu. Choose *Repeat forever *menu option if you would like to play
the signal continuously.

Following signal types are supported by the signal generator:

· **Sine, Cosine**: "pure frequency" signals generated by using corresponding mathematical
functions

· **Step**: Also known as "square wave". Changes its amplitude from minimal to maximal value
according to frequency setting.

· **White noise**: Random signal with a flat distribution of random values

· **Pink noise**: Also known as 1/f noise. Random signal where each octave carriers an equal
amount of noise power, i.e. signal power falls as frequency raises.

· **Sawtooth**: This signal ramps linearly from minimal to maximal value and then sharply drops
to the minimal value again. Its waveform resembles the teeth on the blade of a saw.

· **Triangular**: Similar as sawtooth signals but also falls linearly from maximal to minimal value.
Each period forms a triangle form.

· **Constant:** All signal vales are the same

· **Gaussian noise**: Statistical noise that has a probability density function of the normal
distribution (also known as Gaussian distribution). In other words, the values that the noise
can take on are Gaussian-distributed.

· **Exponential noise**: Statistical noise that has a probability density function of the exponential
distribution. In other words, the values that the noise can take on are Exponential-distributed.

· **Sweep signal**: It is a periodic (sine-like) signal which changes (sweeps) its frequency from
defined start to end frequency during signal duration There are two types of sweep signals: **linear **sweeps** ** through frequency range at linear speed and **exponential **speeds up
exponentially during sweeping so that lower frequencies has longer duration than higher
frequencies.