[Elecraft] hi cut/low cut not work in CW?

[Joe Subich, W4TV]

 > First, why is does high cut not go to 2.7 KHz?

That is the way the DSP is designed.  High and Low Cut are limited to 
pitch +/- half the filter width.  Based on your data, it looks like
your pitch is 500 Hz.

 > BW for this set of data is 2.7 in the BW/SHIFT mode.

Can't be ... you may have started at 2.7 KHz but BW is defined as
2 x (FH-FC) so as soon as you moved either FL or FH BW changed.

73,

    ... Joe, W4TV


On 3/20/2013 9:51 AM, Brian Alsop wrote:
> Shift =.05 does do something but the result still is not as expected.us.
>
> Here's the results with a 2.7 KHz filter
> First high cut maxs out a 2.0 KHz, low cut can go to zero.
>
> High cut      low cut
> 2.0        no effect
> 1.8        0-0.2
> 1.6        0-0.4
> 1.4        0-0.6
> 1.2        0-0.8
> 1.1        0-0.9
> 1.0        0-0.9
>
> First, why is does high cut not go to 2.7 KHz?  BW for this set of data
> is 2.7 in the BW/SHIFT mode.
> Second it does not appear that the high cut and low cut controls are
> independent.
>
> I'm curious about the reason for these observations.
>
> 73 de Brian/K3KO
>
>
> On 3/20/2013 13:23, Joe Subich, W4TV wrote:
>>
>>  > Turn CONFIG:CW QRQ to OFF.
>>
>> and/or reset CONFIG:SHIFT=0.01 to SHIFT=0.05
>>
>> 73,
>>
>>     ... Joe, W4TV
>>
>>
>> On 3/20/2013 8:46 AM, Mike K2MK wrote:
>>> Hi Brian,
>>>
>>> Turn CONFIG:CW QRQ to OFF.
>>>
>>> 73,
>>> Mike K2MK
>>>
>>>
>>> alsopb wrote
>>>> I was doing something odd.  Stock 2.7KHz filter, CW mode, V4.61.
>>>> Removed all equalization.
>>>>
>>>> Wanted to adjust high cut or low cut.  Tapped shift control.  Did not
>>>> revert to high cut/low cut mode.  Ditto for tapping width control.
>>>>
>>>> Can't simulate this with shift because of it's limited range.
>>>>
>>>> High cut/low cut works fine in SSB mode.
>>>>
>>>> 73 de Brian/K3KO
>>>
>>
>
>
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