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
· 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