Easy to use and reliable function generator for applications in the nf range up to 250khz the fg250d is excellently suitable for testing control circuits analogue and digital circuits or for measuring the frequency response of lf amplifiers filters and speakers the amplitude of sine and triangular signals can be modified in the range from 100mv to 5vpp the amplitude of the rectangular signal corresponds to the ttl level 5v a dc voltage coupled output dc opens up many usage possibilit