Quectel Wireless Solutions Company Limited 201807EG95NA Manuale Utente
LTE Module Series
EG95 Hardware Design
EG95_Hardware_Design 49 / 81
@open sky
XTRA enabled
TBD
s
Accuracy
(GNSS)
CEP-50
Autonomous
@open sky
TBD
m
1.
Tracking sensitivity: the lowest GNSS signal value at the antenna port on which the module can keep
on positioning for 3 minutes.
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.
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.
position within 3 minutes after executing cold start command.
4.3.
Layout Guidelines
The following layout guidelines should be taken into account in customers’ design.
Maximize the distance among GNSS antenna, main antenna and Rx-diversity antenna.
Digital circuits such as (U)SIM card, USB interface, camera module and display connector should be
kept away from the antennas.
kept away from the antennas.
Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar
isolation and protection.
isolation and protection.
Keep the characteristic impedance for ANT_GNSS trace as 50Ω.
Please refer to Chapter 5 for GNSS reference design and antenna installation information.
NOTES