[K3] AFSK and roofing filters

[k6dgw]

OK, this happens every time I set up my K3 for RTTY [CQ WW RTTY], even
though I've got two pages of stuff written in my station journal, it
still takes me a couple of hours to get it all right.

I'm in DATA AFSK A.  Everything seems to finally be working.  However,
it is "stuck" in FL1 which is the SSB filter.  If I tap XFIL, the DSP BW
opens up to SSB width.  When I reduce the DSP BW to 400 Hz, that
happens, but strong stations just out of my passband still activate the
AGC.  If I tap XFIL again, everything goes back to SSB BW.

I confess, I really don't understand the K3's data modes very well ...
OK, at all.  Any help would be appreciated.  I will be very much part
time in the contest so I'm not tearing out what little hair I have left
to get it fixed before 0000Z, I'd just like to select the 500 Hz roofer.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2010 Cal QSO Party 2-3 Oct 2010
- www.cqp.org
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[k6dgw]

On 9/24/2010 4:59 PM, JAMES ROGERS wrote:

> Here is what I think might be going on Fred. You have to set the roofing
>   filters ON for each mode in which they may be used. It sounds like you
> have them setup for SSB but not for the modes you are using for RTTY.
> The easiest way to do that is with the K3 Utility and the Crystal Filter
> Configuration or you can do it via the menus.
>
> For instance: In CW I have my 2.8, 1.0 and, 0.400 configured.
> In USB and LSB I have only my 2.8 configured.
> In DATA I have my 2.8, 1.0 and, 0.400 configured.
> The rest of the modes, only the 2.8 is configured.
>
> I hope this helps. After setting them up, turn the radio off and back on
> for the changes to take place.

Thank you Jim, that was the problem.  I turned FL2 on for DATA and now
it stays on as long as my DSP BW is less than .5 KHz.  Thanks

JEFF:  If you see this, post a quick note to me.  I'll check in a bit,
and if I don't see it, I'll answer you direct.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2010 Cal QSO Party 2-3 Oct 2010
- www.cqp.org
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