18信息移频自动闭塞
18information frequency shift automatic block
UM2000移频信号
Frequency Shift Signal UM2000
ZPW-2000A无绝缘移频自动闭塞
ZPW-2000A jointless track circuit frequency-shift
ZPW-2000A Jointless Track Circuit Frequency-shift Automatic Block System
ZPW-2000A移频信号
ZPW-2000A frequency-shift signal
电光移频
electro-optic frequency translation
二进制代码移频键控
BCFSK Binary Code Frequency Shift Keying
高斯最小移频键控
GMSK
Amos
Guassian Minimum Shift Keying GMSK
键控移频
Keyboard controlled shifting frequency signal
快速移频键控
FFSK Fast Frequency – Shift Keying
声光移频
acousto-optic frequency translation
acousto-optic frequency shifter
声光移频器
acoustooptic frequency shifter
sonic-photo frequency shiftor
无绝缘移频自动闭塞
free insulation frequency shift automatic block
Non-insulation automatic block modulated by frequency shi ft