NMEA Manual based on MediaTek chipset - Manual
FTX-HW-13002-A
Preliminary
Page 18 of 39
‘0’: Disable
>= ‘1000’: Enable
[Range: 1000~518400000]
Sleep time
: Interval [msec] to come out of a minimum power sleep mode and start running in order to get a
new position fix. With AlwaysLocate
TM
you cannot set sleep time, since sleep and wakeup are controlled
automatically.
[Range: 1000~518400000]
Second run time
: Duration [msec] to fix for (or attempt to fix for) before switching from running mode back to
a minimum power sleep mode. With AlwaysLocate
TM
you cannot set second run time, since sleep and wakeup
are controlled automatically.
‘0’: Disable
>= ‘1000’: Enable
[Range: Second set both 0 or 1000~518400000]
Second sleep time: Interval [msec] to come out of a minimum power sleep mode and start running in order to
get a new position fix.
[Range: Second set both 0 or 1000~518400000]
Note the second run time should be larger than the first run time when non-zero value.
Example: How to enter Periodic modes
Periodic Backup mode
$PMTK225,0*2B
$PMTK223,1,25,180000,60000*38
$PMTK225,1,3000,12000,18000,72000*16
Periodic Standby mode
$PMTK225,0*2B
$PMTK223,1,25,180000,60000*38
$PMTK225,2,3000,12000,18000,72000*15
Example: How to enter AlwaysLocate modes
AlwaysLocate
TM
Standby
$PMTK225,0*2B
$PMTK225,8*23
AlwaysLocate
TM
Backup
$PMTK225,0*2B
$PMTK225,9*22
This message applies only for MT333X based receivers IT530, IT530M, UC530 and UC530M.
2.21
PMTK251 SET NMEA BAUD RATE
Command purpose:
Set NMEA port baud rate.
Command number:
251
DataField:
PMTK251,Baud rate
Baud rate: Baud rate setting
0 – default setting
4800
