GSM/GPRS/GNSS Module Series
MC60 Series Hardware Design
MC60_Series_Hardware_Design Confidential / Released 78 / 114
A reference circuit is shown as below.
Module
NETLIGHT
4.7K
47K
300R
VBAT
Figure 47: Reference Design for NETLIGHT
3.17. EASY Autonomous AGPS Technology
Supplying aiding information like ephemeris, almanac, rough last position, time and satellite status, can
help improve the acquisition sensitivity and the TTFF for a module. This is called as EASY technology and
MC60’s GNSS part supports it.
EASY technology works as embedded software which can accelerate TTFF by predicting satellite
navigation messages from received ephemeris. The GNSS part will calculate and predict orbit information
automatically up to 3 days after first receiving the broadcast ephemeris, and save the predicted
information into the internal memory. GNSS part of MC60 will use the information for positioning if no
enough information from satellites, so the function is helpful for positioning and TTFF improvement.
The EASY function can reduce TTFF to 5s in warm start. In this case, GNSS’s backup domain should be
valid. In order to gain enough broadcast ephemeris information from GNSS satellites; the GNSS part
should receive the information for at least 5 minutes in good signal conditions after it fixes the position.
EASY function is enabled by default. Command ―$PMTK869,1,0*34‖ can be used to disable EASY
function. For more details, please refer to document [2].
In All-in-one solution, make sure the GNSS part is powered on before sending the PMTK command.
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