10 Technical Appendix
10.7.12 Format of the SYSPLEX-1 Time String
The SYSPLEX1 time string is a sequence of 16 ASCII characters starting with the SOH (Start of Header) ASCII
controll character and ending with the LF (line feed, ASCII Code 0Ah) character.
Please note:
To receive the Timestring on a selected terminal correctly you have to send a "
C
" (once, without quotation marks).
The format is:
<SOH>ddd:hh:mm:ssq<CR><LF>
The letters printed in italics are replaced by ASCII numbers whereas the other
characters are part of the time string. The groups of characters as defined below:
<SOH>
Start of Header (ASCII control character)
sending with one bit accuracy at change of second
ddd
day of year
(001..366)
hh:mm:ss
the current time:
hh
hours
(00..23)
mm
minutes
(00..59)
ss
seconds
(00..59, or 60 while leap second)
q
Quality
indicator
(space) Time Sync (GPS lock)
(?) no Time Sync (GPS fail)
<CR>
Carriage-return (ASCII code 0Dh)
<LF>
Line-Feed (ASCII code 0Ah)
microSync
Date: 22nd June 2020
87
