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P3TXMON Bug?

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Ron Durie

P3TXMON Bug?

My P3TXMON scope display is not performing as it should, while I am talking
in SSB mode.

Frequently the display will go to a straight line with vertical signals that
are very narrow.
It looks almost like it is switching to a very wide span or the time base is
changing frequency.
This will continue until I stop transmitting, then it will be ok for a
while, then does it again.

A friend is also experiencing this same bug on his P3TXMON.

Anyone experiencing this same thing?

Ron Durie
WB4OOA Elecraft K-Line

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Alan Bloom

Re: P3TXMON Bug?

It will do that if the K3 is in transmit mode but with no power coming
out. The P3 auto-scales the modulation display amplitude, so if there
is no signal it jacks the gain way up and you see quantized noise.

The next version of P3 firmware will limit the maximum gain so you don't
see so much noise in that situation.

Alan N1AL

On 08/11/2015 04:00 PM, Ron Durie wrote:

> My P3TXMON scope display is not performing as it should, while I am talking
> in SSB mode.
>
> Frequently the display will go to a straight line with vertical signals that
> are very narrow.
> It looks almost like it is switching to a very wide span or the time base is
> changing frequency.
> This will continue until I stop transmitting, then it will be ok for a
> while, then does it again.
>
> A friend is also experiencing this same bug on his P3TXMON.
>
> Anyone experiencing this same thing?
>
> Ron Durie
> WB4OOA Elecraft K-Line
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Please help support this email list: http://www.qsl.net/donate.html
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>

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Warren Merkel

Re: P3TXMON Bug?

Alan,

Has there been any interest in making the Power and SWR displays hide
when in RX mode and pop-in like the Modulation Envelope does during
TX? I do a lot more RX than TX and would like to configure it to go
back to spit screen signal/waterfall mode when not TX'ing.

Warren, KD4Z

On 8/11/2015 7:25 PM, Alan wrote:
> It will do that if the K3 is in transmit mode but with no power coming
> out. The P3 auto-scales the modulation display amplitude, so if there
> is no signal it jacks the gain way up and you see quantized noise.
>
> The next version of P3 firmware will limit the maximum gain so you
> don't see so much noise in that situation.
>
> Alan N1AL
>

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Alan Bloom

Re: P3TXMON Bug?

It actually does go back to split screen spectrum/waterfall in receive
mode. In transmit mode the spectrum display is replaced by the
modulation waveform, but the waterfall remains on the screen.

There are two reasons why the "meters" remain on the screen in receive
mode. One is that it would be pretty annoying when sending CW QSK for
example to have the window jumping up and down every time you key. The
other is that it would require re-drawing the waterfall every time you
go to transmit mode, which would lose all the waterfall data. I think
many people like to be able to look at the waterfall while transmitting
to see where the signals were the last time they were receiving.

Alan N1AL

On 08/12/2015 11:06 AM, Warren Merkel wrote:

> Alan,
>
> Has there been any interest in making the Power and SWR displays hide
> when in RX mode and pop-in like the Modulation Envelope does during
> TX? I do a lot more RX than TX and would like to configure it to go
> back to spit screen signal/waterfall mode when not TX'ing.
>
> Warren, KD4Z
>
>
> On 8/11/2015 7:25 PM, Alan wrote:
>> It will do that if the K3 is in transmit mode but with no power coming
>> out. The P3 auto-scales the modulation display amplitude, so if there
>> is no signal it jacks the gain way up and you see quantized noise.
>>
>> The next version of P3 firmware will limit the maximum gain so you
>> don't see so much noise in that situation.
>>
>> Alan N1AL
>>
>
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Warren Merkel

Re: P3TXMON Bug?

Alan,

Since "optional" would be the idea, and that the P3 must know (or could
know) what mode the K3 is in, why not make it selectable if not in CW
mode? It sure seems like us folks that want it to swap in and out, are
comfortable waiting a few seconds for the waterfall to update.
It seems half baked to me the way it is. You already swap the
modulation waveform in and out, why not the rest?

Otherwise, is there a way to fire macros from the K3 to the P3 when
going from TX to RX and back? Or maybe fire them from within the P3
itself? Then I guess we could do it ourselves.

Warren, KD4Z

On 8/12/2015 4:53 PM, Alan wrote:

> It actually does go back to split screen spectrum/waterfall in receive
> mode. In transmit mode the spectrum display is replaced by the
> modulation waveform, but the waterfall remains on the screen.
>
> There are two reasons why the "meters" remain on the screen in receive
> mode. One is that it would be pretty annoying when sending CW QSK for
> example to have the window jumping up and down every time you key.
> The other is that it would require re-drawing the waterfall every time
> you go to transmit mode, which would lose all the waterfall data. I
> think many people like to be able to look at the waterfall while
> transmitting to see where the signals were the last time they were
> receiving.
>
> Alan N1AL
>
>
> On 08/12/2015 11:06 AM, Warren Merkel wrote:
>> Alan,
>>
>> Has there been any interest in making the Power and SWR displays hide
>> when in RX mode and pop-in like the Modulation Envelope does during
>> TX? I do a lot more RX than TX and would like to configure it to go
>> back to spit screen signal/waterfall mode when not TX'ing.
>>
>> Warren, KD4Z
>>
>>
>> On 8/11/2015 7:25 PM, Alan wrote:
>>> It will do that if the K3 is in transmit mode but with no power coming
>>> out. The P3 auto-scales the modulation display amplitude, so if there
>>> is no signal it jacks the gain way up and you see quantized noise.
>>>
>>> The next version of P3 firmware will limit the maximum gain so you
>>> don't see so much noise in that situation.
>>>
>>> Alan N1AL
>>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>>
> ______________________________________________________________
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