Content of the usb stick, Introduction – Meinberg TCR170PEX User Manual
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Content of the USB stick
The included USB stick contains a driver program that keeps the computer´s system
time synchronous to the received IRIG-time. If the delivered stick doesn’t include a
driver program for the operating system used, it can be downloaded from:
On the USB stick there is a file called „readme.txt“, which helps installing the driver
correctly.
Introduction
The transmission of coded timing signals began to take on widespread importance
in the early 1950´s. Especially the US missile and space programs were the forces
behind the development of these time codes, which were used for the correlation of
data. The definition of time code formats was completely arbitrary and left to the
individual ideas of each design engineer. Hundreds of different time codes were
formed, some of which were standardized by the „Inter Range Instrumantation
Group“ (IRIG) in the early 60´s.
Except these „IRIG Time Codes“ other formats, like NASA36, XR3 or 2137, are
still in use. The board TCR170PEX however only decodes IRIG-A, IRIG-B or
AFNOR NFS 87-500 formats. The AFNOR code is a variant of the IRIG-B format.
Within this code the complete date is transmitted instead of the ‘Control Functions’
of the IRIG-telegram.