Don,
thanks for the reply.
1. when I try using the Lo-Cut, it seems to be confined to 100 Hz
increments, so, 150, 250, 350, but no 200, 300, or 100 available; is
there a way to set that differently?
2. I can accomplish the same thing either way if I understand what is
going on, but is there a way to preserve the setting?
Thanks again.
--Dave W5SV
On 2/29/12 7:18 PM, Don Wilhelm wrote:
> Dave,
>
> Yes, the default is 1500 Hz. with a 2.8 kHz filter, that puts the low
> end at 200 Hz and the high end at 2900 Hz.
>
> AND that is why you should be using the Hi-Cut, Lo-Cut on SSB instead
> of Shift and Width.
>
> For good intelligibility, you need to have some content in the 300 Hz
> range, so set the Lo-Cut to 200, 250, or 300 depending on your desires
> and the QRM conditions. Then change only the Hi-Cut to reduce the
> filter width - the width will change, cutting the highs and the filter
> center frequency will be automatically changed leaving the low
> frequency end unchanged.
>
> You will find that you can use a filter as narrow as 1500 Hz and still
> maintain SSB intelligibility (for a male voice, a female voice may
> need a few more highs). Using Width and Shift to accomplish the same
> thing is possible, but requires a lot more "knob fiddling".
>
> 73,
> Don W3FPR
>
> On 2/29/2012 6:38 PM, David F. Reed wrote:
>> I note that as expected, the center frequency of the bandpass of any
>> given filter on SSB seems to be 1.5 KHz, whether its the 6 KHz filter,
>> the 2.7 KHz filter or the 2.1 KHz filter.
>>
>> This seems to work out to be passing from 150 Hz to 2.85 KHz, right?
>> So the 2.1 KHz filter (without using the shift control) passes 450 Hz to
>> 2.55 KHz, right?
>>
>> I note that if I shift the center of the filter down to 1.35 KHz, the
>> voices are more intelligible...
>>
>> When I switch filters and get back to the 2.1 KHz filter, the shift is
>> lost; is there a setting I can use to save that shift setting?
>>
>> Thanks& 73 de W5SV, Dave
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