Hello Fellow Time Nuts, we placed the latest firmware version 1.16 onto the _www.jackson-labs.com_ (http://www.jackson-labs.com) website under the support tab. This version fixes the issue that the Lock LED does not go on if the OCXO (which is missing from the PCB of course) is < 35 Degrees C. It also adds the external 1PPS input FailSafe feature (please see the quick-start guide online), and fixes various other minor issues. We hope this helps, and please do let us know if you find any issues, bugs, errata etc! Thanks again, especially to CH for reporting the LED problem, bye, Said **************************************See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)