标准信号发生器 meaning in English

reference generator
reference signal generator
ssg
standard signal generator

Fm - am standard signal generator
Fm - am标准信号发生器立体声信号发生器
Am - fm signal generator
Fm - am标准信号发生器立体声信号发生器
The common frequency synthesizers may not meet the demand on frequency stability and accuracy . and some of them are just desirable at a single frequency , which only can be varied in narrower spectrum
于是出现了高稳定的晶体振荡器作为标准信号发生器,但他们的频率往往是单一的,只能在很小的范围微调。