Frequency reference A frequency reference is an instrument used for providing a stable frequency of some kind. There are different sorts of frequency references, acoustic ones such as tuning forks but also electrical ones that emit a signal of a certain frequency (a frequency standard).
Frequency reference A frequency reference is an instrument used for providing a stable frequency of some kind. There are different! sorts of frequency references, acous,tic ones such as tuning ?forks but also electrical ones that: emit a signal of a certain frequen.cy (a frequency standard).