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How to specify filter in lower sideband using Filt API?

Dave AA6YQ
Dave AA6YQ amateur radio software developer (DXLab)Member ✭✭
edited June 2020 in SmartSDR API
The ethernet API command

filt <slice index> <low_cut_hz> <high_cut_hz>

always places the filter in the upper-sideband.  Reversing <low_cut_hz> and <high_cut_hz> causes the command to be ignored.

How does one place a filter in the lower sideband using the ethernet API?


  • Ken - NM9P
    Ken - NM9P Member ✭✭
    edited June 2020
    Try using negative numbers?
  • Carl Moreschi
    Carl Moreschi Member
    edited July 2015
    Yes, that is the way to do it.  Just multiply the lo cut and hi cut by -1 for LSB.
  • Dave AA6YQ
    Dave AA6YQ amateur radio software developer (DXLab) Member ✭✭
    edited July 2018
    Thanks guys, that works. I've updated the wiki page with this information.

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