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Spectracom Format 1

Format 1 converts the received day of year data (001-366) to a date consisting of day of week, month, and day of the month. Format 1 also contains a time synchronization status character, year, and time reflecting time zone offset and DST correction when enabled.

Available Formats 1 and 1S are very similar to each other. Most external systems utilizing Data Format 1 will look for a single-digit day of the month for day 1 through day 9, with a space in front of each digit ( ^1, ^2, ^3 … 10, 11… ), whereas other systems need to see a two digit day of the month for all days 1 through 9 with a leading 0 instead of a space (01, 02, 03… 10, 11…).

  • If your device requires the two digit day of the month for days 1 through 9 (i.e. 01, 02 etc.), select Format 1.
  • If your device requires the single digit day of the month for days 1 through 9 (i.e. ^1, ^2, etc.), select Format 1S instead. Refer to Spectracom Format 1S for information on Format 1S.

Format 1 data structure:

CR LF I ^ WWW ^ DDMMMYY ^ HH:MM:SS CR LF

Where:

CR Carriage Return
LF Line Feed
I Time Sync Status (space, ?, *)
^ Space separator
WWW Day of Week (SUN, MON, TUE, WED, THU, FRI, SAT)
DD Numerical Day of Month (01-31)
MMM Month (JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC)
YY Year without century (99, 00, 01, etc.)
HH Hours (00-23)
: Colon separator
MM Minutes (00-59)
SS Seconds (00-60)

The leading edge of the first character (CR) marks the on-time point of the data stream.

The time synchronization status character (I) is defined as described below:

? When the receiver is unable to track any satellites and the time synchronization lamp is red.
* When the receiver time is derived from the battery backed clock or set manually through the Setup Port Interface.

Example:

FRI 20APR01 12:45:36

The example data stream provides the following information:

Sync Status The clock is not time synchronized to GNSS. Time is derived from the battery backed clock or set manually
Date Friday, April 23, 2015
Time 12:45:36