IRIG timecode
The IRIG time code (abbreviation for Inter Range Instrumentation Group Time Code ) is a especially in the military sector of the video recording, telemetry and other data records common group of timecode .
The Inter Range Instrumentation Group (IRIG) is an organization of the United States Air Force at the White Sands Missile Range site and defines various standards, including for testing missiles.
Development and structure of the standard
The definition of the IRIG timecode standards started in 1956 and was completed in 1960. The first standard was IRIG 104-60, followed by IRIG 104-70, 200-70, 200-95, 200-98 and 200-04. The current version is IRIG 200-04 (as of September 2004).
Within these standards, different and mutually incompatible time codes are defined as subgroups, which are distinguished by an additional letter such as A, B, D, E, G, and H. The most common time code is IRIG B, followed by IRIG G. The time code IRIG H is used by the National Institute of Standards and Technology (NIST) to provide an accurate time signal for American time signal transmitters such as the WWV , WWVH and WWVB stations to radiate civil use. Functionally, this service is comparable to the German time signal transmitter DCF77 .
The IRIG time code is divided into the following subgroups, which differ from each other in the number of synchronization pulses transmitted per second, the data formats and the modulation techniques used :
- IRIG A: 1000 pulses per second
- IRIG B: 100 pulses per second
- IRIG D: 1 pulse per minute
- IRIG E: 10 pulses per second
- IRIG G: 10,000 pulses per second
- IRIG H: 1 pulse per second
Web links
- Manufacturers of various IRIG devices and information on IRIG
- Website of the US Army White Sands Missile Range (Engl.)
- In-depth technical information
Individual evidence
- ↑ IRIG Standard 200-04 (Engl.)