... tracer Shanghai Total Co., Ltd. is producing oscilloscope, signal generator, function generator, frequency counter, bench top meter, spectrum analyzer, curve ... Digital Frequency counter · Linear/Log Sweep Frequency Function · External FM VCF Input · TTL/CMOS Output · Sine, Square,Triangle, Ramp ... ~20MHz·Output Wave: Sin,Triangle,Puls,Ramp·Signal Type: single,FM,AM,Sweep·Sweep Type: Linear,Log·Sweep ...