Final characterization of InLambda delay standards for supplementary time interval comparison

In this paper we present the final results of characterization of three time interval standards developed and produced by InLambda Company in cooperation with MIRS/SIQ within the EURAMET Project #1288, coordinated by MIRS/SIQ, as a part of preparation for a new Inter-Laboratory Comparison planned as a Supplementary Comparison in the KCDB. Our purpose was to assess the real accuracy of the generated time intervals, covering short- and long-term stability and possible influence of systematic factors/possible errors, in order to define required repeatability and reproducibility conditions giving reduction of systematic effects to a single picoseconds level. We finally obtained 10 ps accuracy and finished characterization.