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TEK-TCG 01-G-Manual-v6-052021
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information in this document is provided for informational use only and is subject to change. For further information or support,
go to www.tekron.com.
IRIG-B Specification
Figure 13 – Image sourced from IRIG Standard 200-04
Only the IRIG ‘B’ format is supported by Tekron products, but all three modulations are
supported. With DCLS/no modulation (pulse width code) no carrier is used, and with
Manchester modified and amplitude modulation (AM) only the 1khz carrier is supported.
Therefore Tekron products support IRIG-B00x, IRIG-B12x, and IRIG-B22x where ‘x’ is the coded
expression.
For the coded expression, BCDtoy and BCDyear are always included in the signal, but straight
binary seconds (SBS) are only included if ‘binary seconds in code’ is enabled, and the control
field (CF) is only included if either AFNOR or C37.118.1 extensions are used. Therefore, coded
expressions 4-7 are supported by Tekron products. Tekron recommends using coded expression
4 with C37.118.1 extensions, as this provides the most information possible to end devices.