In reality, it is relatively easy (i.e. low cost) to make a clock crystal with high precision (<0.5ppm). However making a clock crystal with low phase noise (jitter) is much more difficult (i.e. expensive). Perhaps this why the aftermarket so call"super-clocks" often quote the former and omit this latter, more relevant specification.

Just as importantly, the use of more than one clock (even a "super clock") if it is not synchronised to generate a master clock signal, will mean that the issue of all clocks being out-of-synch with one another has still not been addressed. Again, this leaves the other major source of jitter unresolved.

The OptiClockLock®system means that all the clocks in the CD-77 are purposely synchronized to one temperature-compensated, low-jitter master clock module. This clock module with its dedicated power supply, boasts noise performance at the limits of what is physically possible.

Further, this master clock unlike other clocks, does not uncharacteristically change frequency as the temperature changes because it was constructed to strict military rather than lax commercial standards. With a class-leading level of low phase-noise, it comprehensively
outperforms all other clocks.