User's Guide

LE920A4 HW User Guide Miscellaneous Functions
Doc#: 1VV0301261 GNSS Characteristics
Rev. 4.7.1 Page 96 of 124 2019-11-21
GNSS Characteristics
9.7.1. Reciever performance
Table 44 specifies the typical GNSS characteristics and expected performance. The
values reflect typical environment and conditions.
Table 44: GNSS Characteristics
Parameters
Typical
Measurement
Notes
Sensitivity
Standalone or MS-based
tracking sensitivity
-162.3 dBm
Acquisition -157.5 dBm
Cold start sensitivity -157.5 dBm
TTFF
Hot 1.1s GPS+GLONASS Simulator test
Warm 22.1s GPS+GLONASS Simulator test
Cold 29.94s GPS+GLONASS Simulator test
Accuracy 0.8m GPS+GLONASS Simulator test
Navigation update rate 1 Hz
Dynamics 2g
Operation limits 515 m/sec
A-GPS Supported
9.7.2. GPS Sync Characteristics
The GPS_SYNC signal I/O specification followes the regual 1.8V GPIO as described in
4.3.2
The below figure described the timing of SPG_SYNC signal
GPS_SYNC / PPS 1ms
1ms
1s
1ms
1s
1.8V
0V