Chapter 3 OEM7 Receiver Operation
OEM7 Installation and Operation User Manual v4
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Spectral Analysis Detection takes precedent over Statistical Analysis Detection. If the
same interference is detected by both detectors, only Spectral Analysis Detection is
used to report the interference status.
3.11.2 Disable/Enable Detection
The interference detection feature can be enabled/disabled from any command line or the com-
mand line within NovAtel Connect using the
ITDETECTCONFIG
command.
To disable interference detection, enter:
ITDETECTCONFIG none
To enable interference on all RF paths, enter :
ITDETECTCONFIG all
Interference detection can also be enabled on individual RF paths. See the
ITDETECTCONFIG
command for details.
3.11.3 Monitoring Signals Using a Command Line
The
ITDETECTSTATUS
log lists all detected interference signals. For interference detected by
spectral analysis, the log also provides the center frequency and bandwidth of the interference
signal. With this information, a filter can be configured to mitigate the interference.
Due to the high volume of data, a higher bandwidth medium, such as USB or Ethernet, is
recommended when monitoring signals using the Interference Toolkit.
Example
:
LOG ITDETECTSTATUS onchanged
#ITDETECTSTATUSA,USB2,0,74.0,FINESTEERING,1982,430605.267,0200c000,
7fdb,32768;3,
L1,STATISTICANALYSIS,-0.718,29.167,0.126,12.797,00000000,00000000,
00000000,
L2,SPECTRUMANALYSIS,1249.961,71.191,-56.769,-132.907,00000000,
00000000,00000000,
L2,SPECTRUMANALYSIS,1289.512,1.978,-75.967,-138.493,00000000,
00000000,00000000*5e83b175
In the above example, there are three interference signals detected:
l
Out of band interference near L1 (STATISTICANALYSIS)
l
Interference in the L2 band at 1249.961 MHz
l
Interference in the L2 band at 1289.512 MHz
To view details about the signals that are being received by the OEM7 receiver and determine if
there is an interference signal within the GNSS signals, use the
ITSPECTRALANALYSIS
com-
mand to enable and configure the spectral analysis. The spectrum can then be viewed by plot-
ting the PSD samples in the
ITPSDFINAL
log. NovAtel Connect can also be used to view the
spectrum. See
Monitoring Signals Using NovAtel Connect
Example:
