>and each one of those 1U units costs how much It depends on what capabilities you want. A good oscillator with GPS discipline capabilities would cost between

>and each one of those 1U units costs how much It depends on what capabilities you want. A good oscillator with GPS discipline capabilities would cost between $100-$10000 depending on specifications. In particular, if you want it to have high stability with time and temperature when GPS fails you must spend much more money. >and can feed reference signals to how many individual end-point servers? In theory one of these units could feed a whole datacenter (thousands of endpoints), if you also purchased enough cabling and distribution amplifiers.