Test function generator

Test function generator .
This module shall consist in a generator of functions such as: Dirac pulse, square wave and triangular wave selectable through selection switch.
At some terminals the output signal shall have a fixed amplitude; at other terminals the amplitude shall be continuously adjusted, from 0 V to 10 V, through a potentiometer. The frequency shall  be continuously adjusted, from 0.02 Hz to 10 Hz, through a potentiometer. For what concerns the square wave, it shall be possible to set the ratio between high signal and period, by choosing between 1/2 and 9/10.
Technical features:
•Power supply: +15 V ; 0 V ; -15 V
•Output wave forms:
•Dirac pulse function: 0 .... +10 VP
•Triangular wave function: 0 .... 20 VPP  balanced with respect to ground
•Square wave function: 0 .... 20 VPP  with "high signal/period" ratio = 1/2
•Square wave function: 0 .... +10 VP  with "high signal/period" ratio = 9/10
•Frequency of the output signal: 0.02 .... 10 Hz
•Signal  Ioff  for resetting the integral controllers
It must be mounted on an insulated didactic module, it must  show a schematic diagram and 2 mm safety terminals for the electrical connection;  one potentiometer and  one switch,  two potentiometers, one selector and one switch.  This panel must include also a bus for the supply that allows the connection between the panels.