For general exploringobjects requirement, narrow pulse signal with tens millimicro second to millimicrosecond has the frequency spectrum from DC to thousands MHz.
Adopting Intel Dynamic Processor only designed for Ultraportable Mobile Computing Device by Intel, their basic frequency is 1.6G Hz with average power 2.5W.
The best clocks now scan a one-hertz-wide sweet spot to find its exact center, plus or minus one millihertz, in every single measurement—despite the Heisenberg limits.