Users manual
Appendix A
Revision #:
A
Date:
07-14-15
Page
33
of
58
TIMEALIGN
– setting of time alignment
△
4 Format:
1
2
Num
Contents
Range
Default
Remark
1
TIMEALIGN
-
-
Command Name
2
mode
1 to 3
2
1
: GPS alignment
2
: UTC(USNO) alignment
3 : UTC(SU) alignment
Example:
$PERDAPI,TIMEALIGN,2*31
UTC (USNO) alignment
Notes:
-
Please note that mode 0 is invalid value.
-
User can store current TIMEALIGN command setting on Flash by FLASHBACKUP command.
-
This command is used to set output time alignment and 1PPS alignment.
[1: GPS alignment]
・
Leap second is not applied to output time even if GT-87 already has leap second.
・
PPS is output in synchronization with GPS even if GT-87 already has UTC parameter.
・
In Glonass only mode, correct default leap second is needed to output correct time.
[2: UTC (USNO) alignment]
・
Leap second is applied to output time.
・
PPS is output in synchronization with GPS before taking UTC (USNO) parameter from GPS.
・
PPS is output in synchronization with UTC(USNO) after taking UTC (USNO) parameter from GPS.
・
In Glonass only fix, because GT-87 can’t take UTC (USNO) parameter from GLONASS, PPS is kept
to output in synchronization with GPS.
[3: UTC (SU) alignment]
・
Leap second is applied to output time. And, GMT offset is set as +3:00.
・
PPS is output in synchronization with GPS before taking UTC (SU) parameter from GLONASS.
・
PPS is output in synchronization with UTC(SU) after taking UTC (SU) parameter from GLONASS.
・
In GPS only fix, because GT-87 can’t take UTC (SU) parameter from GPS, PPS is kept to output in
synchronization with GPS.
$PERDAPI , TIMEALIGN , mode *hh <CR> <LF>
