SE868Kx-Ax Family Product User Guide
1VV0301201 Rev. 5
Page 22 of 83
2021-07-15
Not Subject to NDA
Set this threshold to zero to disable static navigation.
This feature is useful for applications in which very low dynamics are not expected, the
classic example being an automotive application.
Static Navigation is disabled by default, but can be enabled by the $PMTK386 command.
Jamming Rejection
–
Active Interference Cancellation (AIC)
The receiver module detects and removes narrow-band interfering signals (jamming
signals) without the need for external components or tuning. It rejects up to 12 CW
(Continuous Wave) type signals of up to
–
80 dBm (total power signal levels). This feature
is useful both in the design stage and during the production stage for uncovering issues
related to unexpected jamming. When enabled, Jamming Rejection will increase current
drain by about 1 mA, and impact on GNSS performance is low at modest jamming levels.
However, at high jamming levels (e. g.
–
90 to
–
80 dBm), the RF signal sampling ADC starts
to become saturated after which the GNSS signal levels start to diminish.
Jamming rejection is enabled by default, but can be disabled with the $PMTK286
command.
Figure 10: Jamming Rejection
