CW Decode

[w2eck]

Sorry I know this just came up but here goes again. New K3 rig operator and I can't get CW Decode to work. I have text decode set to CW 5-40 and THR set to Auto. I am in CW mode and have the T showing under and to the right of CW. I am using auto spot to get the signal zero beat. Getting nice loud clear signal but no decode. A few days back the advice was to TAP the DISP button to clear VFO b area and see the decode. When I tap display, it just alternates between vfo b freq readout or the time. So what am I missing here?
73 Paul
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[k6dgw]

On 8/14/2012 6:28 PM, paul ecker wrote:
> Sorry I know this just came up but here goes again. New K3 rig
> operator and I can't get CW Decode to work.

Firmware revision?  The latest FW [4.51?] has a problem with CW Decode,
fixes are coming.  Try the earlier FW if CW decode is important to you.
  The new version does have some major improvements to the AGC and NR
functions.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2012 Cal QSO Party 6-7 Oct 2012
- www.cqp.org

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[Brian Hunt]

With FW 4.51 installed the CW decode has become problematic.  I think
Wayne mentioned that it was primarily an AGC issue.  With this in mind
I've been able to get it to do almost perfect copy of the W1AW slow
speed code practice tonight. My technique is to set the Threshold to
Auto (HOLD CWT}, carefully tune in the signal to be copied using the CWT
marker and then back down on the RF gain until the characters begin to
appear.  You might have to ride the RF gain control to get consistent copy.

I don't know of any way to lock the VFO-B display into "text" mode.

Hope this helps ...

Brian, K0DTJ

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[Joe Subich, W4TV-4]

> The latest FW [4.51?] has a problem with CW Decode, fixes are coming.

As Wayne posted some time ago, there is no problem with CW decode *IF*
you set the AGC threshold and slope to values that match the pre 4.51
defaults.  I don't remember what the "compatible" values are since I
prefer the improved receiver performance with the new firmware but I
would start with AGC THR between 2 and 5 and AGC SLP between 12 and 15
for best decoder performance (but not best receiver performance).

For grins, I set AGC THR=3 and AGC SLP=13, enabled the CW decoder and
was easily able decode about any CW signal I heard on 30 meters as
long as the sending station was not running his letters together (a
very typical problem - the human brain is better at separating CW
with "short" letter spaces than most decoders.

The issue is that most users tend to operate with 4.51 well below the
AGC threshold and with significant 'non-flat' slope above threshold.
That makes decoding much harder.  The changes will introduce AGC into
the decoding path to restore the more constant audio level into the
decoder.

73,

    ... Joe, W4TV


On 8/14/2012 10:15 PM, Fred Jensen wrote:

> On 8/14/2012 6:28 PM, paul ecker wrote:
>> Sorry I know this just came up but here goes again. New K3 rig
>> operator and I can't get CW Decode to work.
>
> Firmware revision?  The latest FW [4.51?] has a problem with CW Decode,
> fixes are coming.  Try the earlier FW if CW decode is important to you.
>    The new version does have some major improvements to the AGC and NR
> functions.
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2012 Cal QSO Party 6-7 Oct 2012
> - www.cqp.org
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
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> Please help support this email list: http://www.qsl.net/donate.html
>

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[wayne burdick]

I actually recommend something slightly higher for AGC THR, say 5 to  
7. Then adjust the CW decode threshold so that the CWT icon flashes  
along with the incoming CW.

Lyle and I are planning further improvements, in particular making the  
CW decode threshold a lot less finicky.

73,
Wayne
N6KR

On Aug 14, 2012, at 8:21 PM, Joe Subich, W4TV wrote:

>
>> The latest FW [4.51?] has a problem with CW Decode, fixes are coming.
>
> As Wayne posted some time ago, there is no problem with CW decode *IF*
> you set the AGC threshold and slope to values that match the pre 4.51
> defaults.  I don't remember what the "compatible" values are since I
> prefer the improved receiver performance with the new firmware but I
> would start with AGC THR between 2 and 5 and AGC SLP between 12 and 15
> for best decoder performance (but not best receiver performance).
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[Pierfrancesco Caci]

Wayne Burdick <[hidden email]> wrote:

>Lyle and I are planning further improvements, in particular making the
>
>CW decode threshold a lot less finicky.
>



It would be lovely if you could squeeze in a persistent text decode mode for vfo B display, while you are at it. Maybe an additional choice when using DISP?

Pf


--
Pierfrancesco Caci

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[Nr4c]

I for one hope they will offer an option to blank the vfo B freq display  
except when tuning.

...bill nr4c

Sent from my Verizon Wireless Droid

-----Original message-----
From: Brian Hunt <[hidden email]>
To: [hidden email]
Sent: Wed, Aug 15, 2012 02:40:42 GMT+00:00
Subject: Re: [Elecraft] CW Decode

With FW 4.51 installed the CW decode has become problematic.  I think
Wayne mentioned that it was primarily an AGC issue.  With this in mind
I've been able to get it to do almost perfect copy of the W1AW slow
speed code practice tonight. My technique is to set the Threshold to
Auto (HOLD CWT}, carefully tune in the signal to be copied using the CWT
marker and then back down on the RF gain until the characters begin to
appear.  You might have to ride the RF gain control to get consistent copy.

I don't know of any way to lock the VFO-B display into "text" mode.

Hope this helps ...

Brian, K0DTJ

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[wayne burdick]

Pierfrancesco Caci wrote:

> Wayne Burdick <[hidden email]> wrote:
>
>> Lyle and I are planning further improvements, in particular making  
>> the
>>
>> CW decode threshold a lot less finicky.
>>
>
> It would be lovely if you could squeeze in a persistent text decode  
> mode for vfo B display, while you are at it. Maybe an additional  
> choice when using DISP?

You can get "persistent" text display easily if you have a computer  
connected to your KX3 or K3. There are two methods: (1) use the  
Utility program's "terminal" function. (2) Using any type of terminal  
application, send the command "TT1;" to the K3 or KX3.

In both cases, all decoded text will then be sent to the computer  
screen.

73,
Wayne
N6KR

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[Pierfrancesco Caci]

>>>>> "Wayne" == Wayne Burdick <[hidden email]> writes:


    Wayne> You can get "persistent" text display easily if you have a computer
    Wayne> connected to your KX3 or K3. There are two methods: (1) use the
    Wayne> Utility program's "terminal" function. (2) Using any type of terminal
    Wayne> application, send the command "TT1;" to the K3 or KX3.



    Wayne> In both cases, all decoded text will then be sent to the computer
    Wayne> screen.

Well, I can get persistent text display with fldigi too, but that was
not quite the point. The text decode goes away from vfo B area too
quickly, so it's difficult to use. At least it is for me, both for CW (I
have no problem admitting I suck at it and I need a decoder) and for the
built in digimodes. I'd love to be able to get on the air with just the
radio and a piece of paper and pencil, for a change.

Pf

--
Pierfrancesco Caci, ik5pvx
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