[Skimmertalk] Flex and Skimmer : Decoded bandwidth ?

[Andrew O'Brien]

It is interesting because I received private emails today from several Flex
owners asking the same question, they claim that previously they received
no answer on Flex mail lists.  If, as some suggest, Alex has set the limit,
this does not explain the Youtube video I  saw today where someone was
using Skimmer with another SDR and they seemed to be getting about 40 Khz.
  Also, the information I have found implies this is related to roofing
filters.  This should not be an issue with a Flex .

Andy K3UK


On Wed, Aug 21, 2013 at 6:47 AM, Pete Smith N4ZR <n4zr at contesting.com>wrote:

>  Hi Andy - my understanding is that the 24-KHz bandwidth is set in
> software by CW Skimmer.  I do not understand the technical rationale for
> this, but Alex apparently feels it is necessary.  That puzzles me because I
> just saw a Youtube video showing 192-KHz bandwidth running a Funcube Dongle
> Pro+ from the IF output of a TS-830, and EA6VQ is using one alone to
> cover 192 KHz of 6 meters for the RBN.
>
> I know that VE2WU is (or was, I'm not sure) running a Skimmer/Flex
> combination on the RBN, and he reports coverage of 14000-14090.  You might
> get in touch with him.
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network at http://reversebeacon.net,
> blog at reversebeacon.blogspot.com.
> For spots, please go to your favorite
> ARC V6 or VE7CC DX cluster node.
>
> On 8/20/2013 11:19 PM, Andrew O'Brien wrote:
>
> I previously had Skimmer working with an SDR-IQ but lately have been using
> a Flex 3000.  I don't think I have been paying enough attention to the
> settings until today .  The Flex 3000 gives about 96 Khz of bandwidth in
> theory, more like 80 kHz in reality. Plenty for most of my needs, I can
> switch to the SDR-IQ if I need 190 Khz. However, I  notice today that if my
> Flex is set for 14043.00 on 20M, the lowest frequency CW Skimmer decoded a
> CQ call is 14031. , the highest so far is 14055. There may not be a lot of
> CQing above 14055 but I would have thought there would be a fair amount of
> CQs below 14031. I have my sampling rate set to 96 Khz.  The bandscope in
> Cw Skimmer starts at 14031 .  I must be doing something stupid.  To get a
> Flex to work with CW Skimmer, the instructions are to use the Sofrock-IF
> settings.  I wonder is this is part of the issue.  I would like to decode
> CQ over a range wider than 24 Khz.
>
> Andy K3UK
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