Strongly steady electro-circuit. Digital display about frequency &operate conveniently.
6-phases from 0.2Hz-2MHz
Output for empty carry arrive at 5V,600? carried will be higher than 2V(sine wave).
Output voltage balance may be adjusted by 2 groups of attenuator every 20dB and 40dB, total 60dB or potentiometer in continuity.
Sine wave of square wave may be chosen to output.