Gnss; Gnss Technical Specification; Gnss Application Guide - Sunsea AIoT SIMCom SIM7600NA User Manual

Table 30: Recommended TVS
Package Part Number
0201 LXES03AAA1-154
0402 LXES15AAA1-153
Note ： SIMCom suggests the LTE auxiliary antenna to be kept on, since there are many high
bands in the designing of LTE-TDD, such as band38, band40 and band41. Because of the high
insert loss of the RF cable and layout lines, the receiver sensitivity of these bands above will have
risk to meet the authentication without the diversity antenna. For more details about auxiliary
antenna design notice, please refer to document [25].
4.3

GNSS

MODULE merges GNSS (GPS/GLONASS/BD) satellite and network information to provide a
high-availability solution that offers industry-leading accuracy and performance. This solution
performs well, even in very challenging environmental conditions where conventional GNSS
receivers fail, and provides a platform to enable wireless operators to address both location-based
services and emergency mandates.
4.3.1

GNSS Technical specification

 Tracking sensitivity: -159 dBm（GPS）/-158 dBm（GLONASS）/-159 dBm（BD）
 Cold-start sensitivity: -148 dBm
 Accuracy (Open Sky): 2.5m (CEP50)
 TTFF (Open Sky) : Hot start <1s, Cold start<35s
 Receiver Type: 16-channel, C/A Code
 GPS L1 Frequency: 1575.42±1.023MHz
 GLONASS: 1597.5~1605.8 MHz
 BD: 1559.05~1563.14 MHz
 Update rate: Default 1 Hz
 GNSS data format: NMEA-0183
 GNSS Current consumption : 100mA (GSM/UMTS/LTE Sleep ,in total on VBAT pins)
 GNSS antenna: Passive/Active antenna
Note: If the antenna is active type, the power should be given by main board because there is no
power supply on the GPS antenna pad. If the antenna is passive, it is suggested that the external
LNA should be used.
4.3.2

GNSS Application Guide

Users can adopt an active antenna or a passive antenna to MODULE. If using a passive antenna, an
external LNA is a must to get better performance.
The following figures are the reference circuits.
SIM7600NA_user manual _V1.00
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