using the GE864-GPS in stand alone configuration?
answer is yes, you need to send the configuration Tracker Message (MID178,2) to
configures the internal LNA amplifier in low gain mode and drives HIGH the
GPS_EXT_LNA_EN signal that can be used to enable an external LNA.
remember to wait for SiRF ACK of MID178,2, and also for have full effect this
command required a Hot Start .
Unfortunately, if your design does
not have any battery backup, and you removed the Vbatt, it will be necessary to
set these parameters on the startup again.So if the module was turn off and
turn it back on, without removing the Vbatt this settings will be saved, and it
will be available at next power up, but if the Vbatt will be removed the module
will start with default configuration.
the SiRF Star IV-GE864 GPS application note with configuration command.
Thank you for your answer,
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