Product Info

LTE Standard Module Series
EG91 Series Hardware Design
EG91_Series_Hardware_Design 58 / 106
Hot start
@open sky
Autonomous 1.8 s
XTRA enabled 3.4 s
Accuracy
(GNSS)
CEP-50
Autonomous
@open sky
<2.5 m
1. Tracking sensitivity: the minimum GNSS signal power at which the module can maintain lock (keep
positioning for at least 3 minutes continuously).
2. Reacquisition sensitivity: the minimum GNSS signal power required for the module to maintain lock
within 3 minutes after loss of lock.
3. Cold start sensitivity: the minimum GNSS signal power at which the module can fix position
successfully 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.
 Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar
isolation and protection.
 Keep the characteristic impedance for ANT_GNSS trace as 50Ω.
Please refer to Chapter 5 for GNSS antenna reference design and antenna installation information.
NOTES