[Elecraft] DSP Maximum Width

pd0psb p.s.bijpost at gmail.com
Sat May 9 06:42:09 EDT 2009


Hi Thomas,

AM wide limit is about 4,2kHz but this equals roughly 8,4kHz BW in a
conventional receiver (measuring carrier and 2 flanks within the filter)
I personally think even for pleasant BC receiving (without 5kHz
next-channel-heterodynes), future AM-sync or ESSB this should be wide
enough.
Widening even more may have consequences for internal aliasing-suppression
and me not make things better. It may also put a lot of extra strain on DSP
horsepower, which could also be used for other things.

73'
Paul
PD0PSB




Thomas Bingenheimer wrote:
> 
> 
> One of the open questions regarding the continued development of the K3
> that has come up, has been the maximum width of the DSP. The K3 appears to
> be effectively limited to about 4.3 khz, as opposed to +6khz in some of
> the other radios that many of us have access to. Some have express concern
> that this is a limiting factor, at least to some extent, in some modes of
> use.  Is the current limit strictly a matter of the firmware configuration
> for the DSP, or is the hardware itself the limiting factor? If the former,
> are there any plans to extend the width out, to say, 6khz?
> 
> KI4UEJ
> 
> 
>       
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