JP14-R-LP & JP14-Q-LP F
ALCOM
GPS R
ECEIVERS
V
ERSION
1.0.0
will stay on full power until the good navigation solution is computed. The so-called
hibernate state will follow for the remainder of the period. For example, if the
receiver took 15 seconds to fix position and refresh ephemeris on the default period
of 30 minutes, the receiver will sleep for the 29 minutes and 45 seconds. Whenever
the receiver wakes up, it collects almanac and ephemeris data and then goes back
to the previous sleep phase again.
Remark
: The environment temperature may also affect the power consumption in the Hibernate state.
Figure 5:
Three system states in the PTF mode.
5.4.4 NMEA input message for ATP & PTF Mode
Power saving mode is disabled by default. In order to enable it, input the NMEA
message in table below. The description of each parameter used for Adaptive
TricklePower or Push-to-Fix ™ is listed below. How to send these messages to the
target unit, refer to chapter
Appendix
section
11.1
page
33.
Syntax
$PSRF107,<
Mode
>,<
OnTimeMs*
>,<
LPInterval*
>,<
MaxAcqTimeMs
>,<
MaxOffTimeMs
>,<
TPAdaptive
><*
CS
><
CR><LF
>
Examples
$PSRF107,1,400,2000,60000,60000,1
*17
<CR><LF>
$PSRF107,2,400,60000,60000,60000,0
*21
<CR><LF>
$PSRF107,0,0,0,0,0,0
*21
<CR><LF>
Parameter Description
<Mode>
It defines the mode to be performed. It can be set to:
0
Sets the target receiver back to the Continuous mode
(full power).
1
Sets the target receiver into the Adaptive TricklePower
(TP) mode.
2
Sets the target receiver into the Push-To-Fix (PTF) mode.
<OnTimeMs
*
>
It defines the OnTime period in milliseconds the receiver will stay in full
power state until a position solution is made and estimated to be
reliable. Please note that, in harsh tracking environments the receiver
automatically switches to full power state to improve navigation
performance even if the defined OnTime has been expired. When the
satellites are sorted according their signal strength, the fourth satellite
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