ZED-F9R-Integration manual
Features Parameter Value
Jamming Feature Jamming Detection Enabled
Jamming State Jamming Indicated
Jamming Detectors:
1575420 kHz: Jammed/Not Jammed
1561098 kHz: Jammed/Not Jammed
1602000 kHz: Jammed/Not Jammed
1227500 kHz: Jammed/Not Jammed
1207140 kHz: Jammed/Not Jammed
1246000 kHz: Jammed/Not Jammed
Spoofing Feature Spoofing Detection Enabled
Spoofing State Indicated/Not Indicated
Spoofing Detectors:
Simulated Signal Not spoofed/Spoofed
Abnormal Signal Not spoofed/Spoofed
Sensor/GNSS mismatch Not spoofed/Spoofed
Abrupt Changes Not spoofed/Spoofed
Table 27: Jamming/interference monitor reported states
3.11.4 UBX-SEC-SIGLOG message description
The UBX-SEC-SIGLOG message provides a log of past signal security related events, that is, events
related to jamming and spoofing.
Each event is a combination of a detection type and a event type, where the event type 'indication
started' and 'indication stopped' and also the event type 'indication triggered' and 'indication timed-
out' form a pair.
A maximum of 16 events are logged; after the log is filled, recent events take precedence over past
events in the log. Power cycles and restarts of the receiver reset the log, deleting its content.
An example of the detection in the following table:
Time Elapsed Detector Type Event Type
7s Jamming Indication stopped
7s Abrupt change Indication stopped
10s Abrupt change Indication stated
Table 28: Example of UBX-SEC-SIGLOG Events detected
3.11.5 GNSS receiver integrity
3.11.5.1 Secure boot
The ZED-F9R boots only with firmware images that are signed by u-blox. This prevents the execution
of non-genuine firmware images run on the receiver.
3.11.5.2 Secure firmware update
The firmware image itself is encrypted and signed by u-blox. The ZED-F9R verifies the signature at
each start.
UBX-20039643 - R06
3 Receiver functionality Page 76 of 119
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