ashtech HDS800, Справочное руководство

Страница: 346 / 678

330
Set Command Library
GPS: GPS Tracking
Function
This command is used to enable or disable GPS tracking.
Enabling GPS tracking will power on the corresponding part
in the RF section, if not powered on yet.
Conversely, disabling GPS tracking will power off the
corresponding part in the RF section, unless Galileo and
SBAS reception requires that this part be kept in use.
Important! Combined with $PASHS,CFG, this command
makes command $PASHS,GNS,CFG obsolete.
Command Format
Syntax
$PASHS,GPS,ON[,s1[,s2[,s3]]][*cc]
$PASHS,GPS,OFF[*52]
Parameters
Remember the settings you make with $PASHS,CFG have
priority over those made with $PASHS,GPS.
The table below summarizes the interaction between these
two commands. Its content should be interpreted as follows:
– If you run one of the $PASHS,GPS,... commands
mentioned in the left-hand column,
– and you earlier chose to enable the single, dual- or triple-
signal tracking using $PASHS,CFG (headers of 2nd, 3rd,
4th columns),
Parameter Description Range
s1
First Signal:
• 1C: Tracking GPS L1 C/A signal
1C
s2
Second Signal:
• 2L: Tracking L2CS signal for all GPS SVs
• 2W: Tracking L2P signal for all GPS SVs
• 2LW: Tracking L2CS signal for L2CS-capable
GPS SVs and L2P for others
• 5Q: Tracking L5 signal for all GPS SVs
• “Blank”: No second signal to be tracked
2L, 2W,
2LW, 5Q or
“blank”
s3
Third Signal:
• 2L: Tracking L2CS signal for all GPS SVs
• 5Q: Tracking L5 signal for all GPS SVs
• “Blank”: No third signal to be tracked
2L, 5Q or
“blank”
*cc Optional checksum *00-*FF