public void ConfigFrequency(double freq, FreqUnit freqUnit) { string str = string.Empty; str = ":FREQ:CW " + freq.ToString() + " "; switch (freqUnit) { case FreqUnit.MHZ: str = str + "MHZ"; break; case FreqUnit.KHZ: str = str + "KHZ"; break; case FreqUnit.HZ: str = str + "HZ"; break; default: str = str + "MHZ"; break; } this.Mgr_8648.GPIBWrite(str); }