LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 51 / 76
1. Tracking sensitivity: the lowest GNSS signal value at the antenna port on which the module can keep
on positioning for 3 minutes.
2. Reacquisition
sensitivity: the lowest GNSS signal value at the antenna port on which the module can
fix position again within 3 minutes after loss of lock.
3. Cold start sensitivity: the lowest GNSS signal value at the antenna port on which the module fixes
position within 3 minutes after executing cold start command.
4.3. Layout Guidelines
The following layout guidelines should be taken into account in customers designs.
Maximize the distance between GNSS antenna and main antenna.
Digital circuits such as (U)SIM card, USB interface, camera module, display connector and SD card
should be kept away from the antennas.
Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar
isolation and protection.
Keep
50
Ω
characteristic impedance for the ANT_GNSS trace.
Please refer to
Chapter 5
for GNSS antenna reference design and antenna installation information.
Hot start
@open sky
Autonomous TBD
s
XTRA enabled
TBD
s
Accuracy
(GNSS)
CEP-50
Autonomous
@open sky
TBD m
NOTES
