调频发射机，(1)　　在发射频率范围内，预置5个频率点，用手动方式选择其中一个发射

(2)　　进一步提高通信距离；

(3)　　调制失真不大于10

(4)　　10.(4)其他特色与创新。

-FM Transmitter, (1) in the firing frequency range, the preset frequency of 5 points manually select one of the launch (2) further enhance the communication distance　(3) modulation distortion is less than 10　 (4) 10 . (4) other characteristics and innovation.