[time-nuts] Upgrading possibilities for more accurate, precise stable mark ii

[Ronald Held]

Greetings:
  I do not know how to properly add to a thread, so I am resubmitting
this I do not have the necessary circuit skills, so i would have to
buy preassembled components. I have a
Endrun Precis Cf OCXO discipline via CDMA signals, which go into a display
unit driven by a STAMP microprocessor(AFAIK, since Bob build and
programmed it.
  Given that I cannot receive GPS signals in my apartment, what are my options?
Is it to go to a Rb/Cs standard and counter? if that is so how do I
periodically sync up with a more accurate time source?
                                   Ronald