Parallel and serial formatted time codes are used to efficiently interface the timing system to the user system. Parallel time codes are defined in IRIG standard 205-87. Standardization of time code is necessary to ensure system compatibility among the various ranges, ground networks, industrial projects and international cooperation.The IRIG standard 200-98, define IRIG serial time code formats. The characteristics of six serial time codes presently used are defined :A, B, D, E, G, H.
For a detailed presentation of these characteristics, download the pdf version of the IRIG standard :
IRIGB standard 200-04, pdf file (372 Ko)
For a first introduction to IRIGB characteristics, we provide the main information through the two following figures :
The figure below shows the IRIG format B: BCD time-of-the year in days, hours, minutes and seconds