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Line 1: '''Inter-range instrumentation group time codes''', commonly known as '''IRIG timecodes''', were created by the TeleCommunications Working Group of the [[IRIG\|Inter-Range Instrumentation Group]], the standards body of the [[Range Commanders Council]]. Work on these standards started in October [[1956]], and the original standards were accepted in [[1960]]. The original formats were described in IRIG Document 104-60, later revised and reissued in August [[1970]] as IRIG Document 104-70, upgraded later that year as the IRIG Document to the status of a Standard, IRIG Standard 200-70. The latest version of the Standard is IRIG Standard 200-04. The different timecodes defined in the Standard have alphabetic designations. A, B, D, E, G, and H are the standards currently defined by 200-04. C was in the original specification, but was replaced by H. The main difference between codes is their rate, which varies between one pulse per minute and 10,000 pulses per second. * A: 1000 PPS

IRIG timecode: Difference between revisions