CHAPTER 7. RECE
I
VER MON
I
TOR
I
NG
7.1.1 Narrowband interference mitigation
Configuring the notch filters
I
n the default auto mode of the notch
fi
lters, the receiver performs automatic interference
mitigation of the region of the spectrum a
ff
ected by interference.
I
n manual mode as shown
con
fi
gured for Notch1 in Figure 7-2, the region of the a
ff
ected spectrum is speci
fi
ed by a
center frequency and a bandwidth which is e
ff
ectively blanked by the notch
fi
lter.
Figure 7-2:
Con
fi
guring the
fi
rst notch
fi
lter Notch1 at 1235 MHz
With the Notch1 settings as shown in Figure 7-2, the L2-band after the notch
fi
lter (After
I
M)
is shown in Figure 7-3 with the blanked section clearly visible.
Figure 7-3:
The RF spectrum of the L2 Band after applying the notch
fi
lter at
1235 MHz
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