频率校正信道/频率校准信道
Frequency Correction Channel FCCH
石英晶体频率校准仪
quartz crystal calibration equipment
校准频率和时间讯号
standard frequency and time signal
自动频率校准
auto frequency calibration
保证率频率
guaranteed rate frequency
保证率频率法
guaranteed rate-frequency method
Guarantee rate-Frequency method
保证率-频率法
Guarantee rate-Frequency method
本地振荡器频率
local oscillator frequency
LOF
标﹝准﹞频﹝率﹞电台
standard frequency station
标﹝准﹞频﹝率﹞业务
Standard frequency service