[Elecraft] Data mode and filters

[Joe Subich, W4TV]

On 2015-05-05 11:30 PM, KV6O wrote:
 > Huh.  Is there anyway around this?

No, the DSP is used for demodulation (15 KHz final IF to audio).

The 6 KHz bandwidth is generally used for AM where 6 KHz at RF
represents 3 KHz at audio (AM RF bandwidth = 2 x AF bandwidth).

The 4.2 KHz maximum "HI" frequency is based on the design of
the digital to analog converter and a decision that 4000 to
4500 Hz is the highest frequency required for communications
quality audio.  The K3 is not and was never deigned to be a high
fidelity receiver.

73,

   ... Joe, W4TV


On 2015-05-05 11:30 PM, KV6O wrote:
> Huh.  Is there anyway around this?  I use data modes way more than AM, sure
> would be nice to be able to get the 6k filter to work!  Don't need DSP for
> these modes....
>
> Thanks,
>
> Steve
> KV6O
>
>
>
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