M3SR Series 4100 Selecting the Notch Filter Speed
3.156 Operating Manual 6175.4760.02 – 01
3.7.2.19 Selecting the Notch Filter Speed
Softkey Softkey Type Description
Listbox 1. Press 'Notch' softkey.
2. Select desired value from list, slowest to 
fastest.
3. Press 'ENT' to confirm.
This radio uses a high-efficiency auto notch fil-
ter, automatically searching for disturbing car-
riers that can be notched to improve the 
readability of a voice reception signal.
Within this list, the speed of notch following the 
interferer can be selected. In the fastest set-
ting, some distortion of weak voice signals 
might occur.
Notch Filter is only available in modulation 
mode J3E.