[arm-allstar] Using Notch filter in rpt

[David McGough]

Hi Chris,

No, the rxnotch setting is for a notch filter. For this filter to be
effective, it must be relatively narrow in frequency range.

What you're describing is a high-pass filter: every frequency below a 
cut-off point is significantly attenuated. Simpleusb currently has two 
high-pass filters. The first is the plfilter setting (option H in 
simpleusb-tune-menu) and the second is simply the pre-emphasis setting 
(option F).

More filters selections are coming in the new chan_iopipe driver, 
including allowing user-defined filters.

What type of noise are you trying to reduce?

73, David KB4FXC



On Mon, 21 May 2018, "chris novara via arm-allstar" wrote:

> I would like to notch out 0-300hz 
> 
> Can I effectively do this using the rxnotch= ?
> 
> Trying to figure out how to program that in. 
> 
> Thank you,
> 
> Chris Novara, AB7BS
> Eugene Oregon
> 
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