we offer sine-square oscillator 1hz to 1mhz. specification frequency range : 1 hz to 1 mhz in six decade steps dial accuracy : ± 3% wave form : sine & square wave output voltage : (1) sine wave 0 - 10v in 3 decade steps of 10v , 1v & 0.1v with continuously variable control (2) square wave 0 - 15v pp continuously variable sine wave distortion : less than 0.5% from 100 hz to 100khz square wave rise time : less than 100 neno sec. at maximum output square wave symmetry : duty factor variable from 0% to 80% output impedance : 600 ohm ± 5% power : 230v ac ± 10