Lower the pressure and largen the current of common electric current through transformer.

是利用普通电流经过变压器作用，使电压降低而电流变大。

Fine resolution is used to largen the capability of channels as well as to improve the system agility.

小步进跳频有利于增大信道容量，提高系统灵活性，也是一项重要指标。