多功能函数信号发生器，频率计，可产生三角波，方波，正炫波，锯此波，且波形幅度和频率可步进调节，最高频率可达40MHz-Multi-function signal generator, frequency counter, can generate the triangular wave, square wave, is hyun waves, saw this wave, and wave amplitude and frequency adjustment can be stepper, th

This the sorce code in Visual Basic 6 for the Frequency counter.-This is the sorce code in Visual Basic 6 for the Frequency counter.