TRAK MODEL 9100 MODULAR FREQUENCY/TIME SYSTEM
3-18
TM4400013 Rev D
Set/Request DST dates
This command enters the day light savings time (DST) Spring and Fall change dates. Refer to Table 3-2 for
factory default dates. Local standard time may be selected when DST is not used.
Request mode:
Host sends: X.SDD<CR>
9100 replies: X.SDD mm,dd,mm,dd,M<CR><LF>
Where: 1st mm,dd - is Spring's date and
2nd mm,dd - is Fall's date
M is a "D" if daylight or an "S" if standard
X is described on command summary page.
Set mode:
Host sends: X.SDD mm,dd,mm,dd,M<CR>
9100 replies: X.SDD DONE<CR><LF>
Where: Same as for SDD request mode.
Set/Request local position
The position entered with this command may be used in two ways. If the position source is “N” or “NA”, the GPS
receiver will accept and use the entered position, but will update it as navigation solutions are computed; if the
position source is “U”, the entered position will be used and no position solutions will be performed. If the
position source is “A”, the entered position will not be used, but will be stored for later retrieval should the user
decide to change the position source. Refer to SPS command for further clarification of when this command is
used.
Warning: Entering an incorrect position will degrade the GPS REF module timing accuracy and in some
cases, the GPS will cease satellite tracking.
Request mode:
Host sends: X.SLP<CR>
9100 replies: X.SLP dd:mm.fffN,ddd:mm.fffW,Shhhhh.f<CR><LF>
Where: dd:mm.fff is Latitude (N is North or S is South)
ddd:mm.fff is Longitude (W is West or E is East)
Shhhhh.f is signed Height in meters
X is described on command summary page
Set mode:
Host sends: X.SLP dd:mm.fffN,ddd:mm.fffW,Shhhhh.f<CR>
9100 replies: X.SLP DONE<CR><LF>
Where: Same as for SLP request mode.
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