K3 RTTY bug

[Barry]

  OK, here's a weird one...

I'm calling some of the PJs in RTTY, using Data Mode FSK and Text
Decode, operating Split.
I have my callsign programmed in M1.  I have my callsign x2 followed by
IM in M2.
When I call with M1 or M2 only, all is OK.  If I call with M1 followed
by M2, chaining them together, when back in Rx, the background noise is
present, but there are no signals.  If I press A/B twice, signals return.

Barry W2UP

--

Barry Kutner, W2UP             Lakewood, CO

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[N6JW]

This is exactly the same bug I have reported here twice before.
Others have confirmed the same thing.  Wayne has indicated
that he is looking into it.

It is not a new bug.  I noticed it soon after getting my K3 #936,
but at the time I did not realize what was happening and put it
down to my own ineptitude.

While this is clearly not the same issue Wes reported in the "mode
change while in split" problem, I'm suspicious that they may be
somehow related, with the common link being use of RTTY at the
time.  Wes, where you using the FSK D mode by any chance?

The "FSK D mode chaining bug" is now well described,
reproducible, and hopefully solvable.

We await word on a possible firmware fix.

Regards to all, 73

John, N6JW

Barry wrote

I'm calling some of the PJs in RTTY, using Data Mode FSK and Text
Decode, operating Split.
I have my callsign programmed in M1.  I have my callsign x2 followed by
IM in M2.
When I call with M1 or M2 only, all is OK.  If I call with M1 followed
by M2, chaining them together, when back in Rx, the background noise is
present, but there are no signals.  If I press A/B twice, signals return.

Barry W2UP

[n7ws]

No, for the moment I'm using AFSK here.

--- On Thu, 10/14/10, N6JW <[hidden email]> wrote:

This is exactly the same bug I have reported here twice before.
Others have confirmed the same thing.  Wayne has indicated
that he is looking into it.

It is not a new bug.  I noticed it soon after getting my K3 #936,
but at the time I did not realize what was happening and put it
down to my own ineptitude.

While this is clearly not the same issue Wes reported in the "mode
change while in split" problem, I'm suspicious that they may be
somehow related, with the common link being use of RTTY at the
time.  Wes, where you using the FSK D mode by any chance?

The "FSK D mode chaining bug" is now well described,
reproducible, and hopefully solvable.

We await word on a possible firmware fix.

Regards to all, 73

John, N6JW



Barry wrote:

>
> I'm calling some of the PJs in RTTY, using Data Mode FSK and Text
> Decode, operating Split.
> I have my callsign programmed in M1.  I have my callsign x2 followed by
> IM in M2.
> When I call with M1 or M2 only, all is OK.  If I call with M1 followed
> by M2, chaining them together, when back in Rx, the background noise is
> present, but there are no signals.  If I press A/B twice, signals return.
>
> Barry W2UP
>
>

     
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[wayne burdick]

Hi all,

Finally found the problem with message chaining in FSK-D mode.  
Chaining was selecting the wrong RX-mode crystal filter in some cases  
on exit from transmit. This could result in a receive frequency offset.

If you'd like to test the new field-test firmware (rev 4.15), please  
email me directly (n6kr at elecraft dot com).

73,
Wayne
N6KR

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[N6JW]

Hi Wayne:

As one of the first to report this issue, I would be happy
to try out rev. 4.15.

Thanks so much for your efforts, 73

John, N6JW

wayne burdick wrote

Hi all,

Finally found the problem with message chaining in FSK-D mode.  
Chaining was selecting the wrong RX-mode crystal filter in some cases  
on exit from transmit. This could result in a receive frequency offset.

If you'd like to test the new field-test firmware (rev 4.15), please  
email me directly (n6kr at elecraft dot com).

73,
Wayne
N6KR