TTM 01-G Manual / October 2018
21
IRIG J-17 Time Code O/P
Table 8 details the IRIG-J17 serial string format and fields.
About
This code is compatible with IRIG Standard 212-00.
Timing
Transmitted once every second. The leading edge of the “start” bit of the first character
<SOH> is exactly on the second that the message describes.
Default Comms
9600 bps, 7-bit ASCII, odd parity
Definition
<SOH>ddd:hh:mm:ss<CR><LF>
Placeholder
Content
<SOH>
Start Of Header: HEX 01
ddd
Day of year: range “001” – “366”
:
HEX 3A
hh
hour: “00” – ”23”
:
HEX 3A
mm
minute: “00” – “2”
:
HEX 3A
ss
Seconds: “00” – “59”
<CR>
Carriage Return: HEX 0D
<LF>
Line Feed: HEX 0A
Table 8 - IRIG-J17 String Time Code Format Fields
Example:
Interpretation:
<SOH>112:12:34:36<CR><LF> day 112, time 12:34:36
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