3 Command Line Reference
snf
gnf
setNotchFiltering
getNotchFiltering
Notch
Notch
Mode
CenterFreq
Bandwidth
+ Notch1
+ Notch2
+ Notch3
all
auto
off
manual
1100.000
. . . 2550.000
MHz
30 . . . 1600 kHz
RxControl: Navigation > Advanced User Settings > Frontend and Interference Mitigation > Frontend Settings
Use these commands to set the position of the notch filter(s) in the receiver’s frontend. Notch
filters are used to cancel narrowband interferences.
The
Mode
argument is used to enable or disable the notch filter specified in the first argu-
ment. When set to
auto
, the receiver performs automatic detection of the region of the
spectrum affected by interference if any. In
manual
mode, the user forces a certain region
of the spectrum to be blanked by the notch filter. That region must be specified by the ar-
guments
CenterFreq
and
Bandwidth
.
Bandwidth
is the double-sided bandwidth centered at
CenterFreq
. Specifying a region outside of a GNSS band has no effect.
In some cases, changing the operating mode of the notch filters (i.e. modifying the
Mode
argument) can cause the tracking loops to reset.
Example
COM1>
snf, Notch1, manual, 1227.0, 30<CR>
$R: snf, Notch1, manual, 1227.0, 30
NotchFiltering, Notch1, manual, 1227.000, 30
COM1>
121
Содержание PolaRx5TR
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