... · External FM VCF Input · TTL/CMOS Output · Sine, Square,Triangle, Ramp, Pulse · 2 LED display Volt. & Freq. · Full metal box,well ... ~15MHz /YB1620 0.2Hz~20MHz·Output Wave: Sin,Triangle,Puls,Ramp·Signal Type: single,FM,AM,Sweep·Sweep Type: Linear,Log ...