In terms of CW, Q switch is used for turning on or off. The speed to turn on or off the switch is set by frequency. As the frequency is indicated as "f" and the time is displayed by "T", "f" is calculated by dividing 1 by "T". In other word, as the number of "f" gets larger, the number of "T" becomes smaller. Accordingly, the dot is printed precisely as well as finely. In contrast, the peak power is smaller following this.