Smiths TRAK 9100 - Time of Day (TOD) Output

TRAK MODEL 9100 MODULAR FREQUENCY/TIME SYSTEM
3-9
TM4400013 Rev D
3-4 TOD OUTPUT
The Model 9100 provides an ASCII time of day (TOD) output message that is output once per second. Two
formats are available and are selected through the RS-232 I/O or 10 BASE T using the SCM command. Refer to
section 3-5 for description of this command.
3-4.1 Time Format 1
Time is output once per second from the TOD output port in the following format:
TYYYY,MM,DD,HH:mm:SS,F<CR/LF>
Where:
T = Start of string (RS-232 positive going edge of the start bit that comprises the ASCII “T” is the “on-
time mark”).
YYYY = Year
MM = Month of year
DD = Day of month
HH = Hours of day
mm = Minutes of hour
SS = seconds of minute
F = Time Figure of Merit (TFOM), “0” when time is unknown or > 1μs and “4” when time is valid and <
1μs.
CR/LF = Carriage return/Line feed
3-4.2 Time Format 2
Time is output once per second from the TOD output port in the following format:
<CR/LF>FspspDDDspHH:MM:SSspDsTZ=xx<CR/LF>
Where:
First CR/LF = Start of string (RS-232 positive going edge of the start bit that comprises the first ASCII
“CR” is the “on-time mark”).
F = TFOM, “Space” when time is valid and < 1μs, “?” when time is unknown or > 1μs, or “*” when in
holdover mode
spsp = space space
DDD = Day of year
sp = space
HH = Hours of day
MM = Minutes of hour
SS = seconds of minute
sp = space
Ds = Daylight savings, “S” during periods of standard time for selected DST schedule, “I” for 24 hour
preceding DST, “D” DST, and “O” for 24 hour period after DST
TZ = Time zone
xx = time zone number (Example: Eastern time zone is 05. Pacific is 08)