Brandywine NTA-100, Руководство пользователя

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MANUAL P/N 900000012 REV F
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4.4.1 Reference
The Reference consists of two fields, the Select reference and Reference Stable. The Select
reference allows the user to select one of the three references to acquire time from. The three
references used by the system are NTP Time Server, Serial Port Input, and GPS (model NTA-
100GM only).
The NTP Time Server reference uses the Network Time Protocol to synchronize the internal clocks of
a computer to the reference’s time. The stratum level may vary depending on the current reference
setting. To use this reference the NTP Server Address Pool must be setup.
The Serial Port Input reference continuously receives an update every second. The stratum level for
this reference is 2.
The serial time format is
[STS][DOW][%x20][DAY]/[MONTH]/[YEAR][%x20%x20][HOUR]:[MINUTE]:[SECOND][0x0D]
.
The
table below lists the data and descriptions used.
DATA DESCRIPTION
STX
Start of the message %x02 and this character acts as the 1PPS timing
mark
%W
Day of the week written as three letters: Sun, Mon, Tue, Wed, Thu,
Fri, and Sat
%x20 Space character
%D Two digit number of the day (01 - 31)
%x2F Slash character '/'
%m Two digit number of the month (01 - 12)
%x2F Slash character '/'
%Y Two digit number of the year (00 - 99)
%X20 Space character
%x20 Space character
%H Two digit number of the hour (00 - 23)
%x3A Colon character ':'
%M Two digit number of the minute (00 - 59)
%x3A Colon character ':'
%S Two digit number of the second (00 – 59)
%x0D End of message – carriage return