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 > 1
μ
s and “4” when time is valid and <
1
μ
s.
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 < 1
μ
s, “?” when time is unknown or > 1
μ
s, 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)
Содержание TRAK 9100
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