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Format of the sysplex-1 time string – Meinberg PZF600 User Manual

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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 character and ending with the LF (line feed,
ASCII Code 0Ah) character. The format is:

ddd:hh:mm:ssq

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:

Start of Header (ASCII control character)

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)

Carriage-return (ASCII code 0Dh)

The start bit of carriage-return is transmitted synchronous with the
rising edge of the PPS pulse.

Line-feed (ASCII code 0Ah)