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P3 Feature Request - Transmit sampling

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WB4SON

P3 Feature Request - Transmit sampling

So I've been loving my P3 for about 2 years now, and I keep looking at that
lonely sensor window in the back, dreaming and wishing....

Yesterday I received an email from a ham a few thousand miles away asking
me to clean up my signal -- I was running JT65 at the time, and he saw my
signal decode on his rig in a half-dozen spots across the waterfall. I
panicked, of course, and immediately checked everything -- Line Level was
four bars steady with an occasional fifth bar flickering, transmit power
was 5.0 watts, monitor was sounding perfectly fine, and my handheld
receiver was sounding OK too. Later that night a nearby ham was nice
enough to run a spectral analysis on my signal and found it looked clean as
well.

Imagine how easy it would be for me to verify my outbound signal quality if
my P3 had an outboard RF sampling tap that communicated via IR back to the
P3 and allows the outbound RF to be displayed.

One can dream and wish.

73, Bob, WB4SON
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73, Bob, WB4SON

Gary Gregory-2

Re: P3 Feature Request - Transmit sampling

Your not alone...:-(

On 25 September 2013 00:09, Bob <[hidden email]> wrote:

> So I've been loving my P3 for about 2 years now, and I keep looking at that
> lonely sensor window in the back, dreaming and wishing....
>
> Yesterday I received an email from a ham a few thousand miles away asking
> me to clean up my signal -- I was running JT65 at the time, and he saw my
> signal decode on his rig in a half-dozen spots across the waterfall. I
> panicked, of course, and immediately checked everything -- Line Level was
> four bars steady with an occasional fifth bar flickering, transmit power
> was 5.0 watts, monitor was sounding perfectly fine, and my handheld
> receiver was sounding OK too. Later that night a nearby ham was nice
> enough to run a spectral analysis on my signal and found it looked clean as
> well.
>
> Imagine how easy it would be for me to verify my outbound signal quality if
> my P3 had an outboard RF sampling tap that communicated via IR back to the
> P3 and allows the outbound RF to be displayed.
>
> One can dream and wish.
>
> 73, Bob, WB4SON
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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Stewart Bryant

Re: P3 Feature Request - Transmit sampling

On 24/09/2013 15:11, Gary Gregory wrote:
> Your not alone...:-(
>

+1

This is one of the nicer features of my Flex1500

Stewart/G3YSX

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k5oai

Re: P3 Feature Request - Transmit sampling

In reply to this post by Gary Gregory-2

I know we aren't suppose to do the 'me to' kind of posts here
and before hundreds of others add theirs and the topic gets canned
(again)...

as far as I am concerned this is the only remaining 'feature' that ruins
an otherwise perfect station combo.

perhaps the Flex is worth looking at again if this is never going to be
addressed??

On 9/24/2013 9:11 AM, Gary Gregory wrote:

> Your not alone...:-(
>
>
> On 25 September 2013 00:09, Bob <[hidden email]> wrote:
>
>> So I've been loving my P3 for about 2 years now, and I keep looking at that
>> lonely sensor window in the back, dreaming and wishing....
>>
>> Yesterday I received an email from a ham a few thousand miles away asking
>> me to clean up my signal -- I was running JT65 at the time, and he saw my
>> signal decode on his rig in a half-dozen spots across the waterfall. I
>> panicked, of course, and immediately checked everything -- Line Level was
>> four bars steady with an occasional fifth bar flickering, transmit power
>> was 5.0 watts, monitor was sounding perfectly fine, and my handheld
>> receiver was sounding OK too. Later that night a nearby ham was nice
>> enough to run a spectral analysis on my signal and found it looked clean as
>> well.
>>
>> Imagine how easy it would be for me to verify my outbound signal quality if
>> my P3 had an outboard RF sampling tap that communicated via IR back to the
>> P3 and allows the outbound RF to be displayed.
>>
>> One can dream and wish.
>>
>> 73, Bob, WB4SON

--

GB & 73
K5OAI
Sam Morgan
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Gary Gregory-2

Re: P3 Feature Request - Transmit sampling

Sam,

I still believe in the ol saying...the squeeky wheel get's the oil...so
it's good to keep our requests up.

73

On 25 September 2013 01:03, Sam Morgan <[hidden email]> wrote:

> I know we aren't suppose to do the 'me to' kind of posts here
> and before hundreds of others add theirs and the topic gets canned
> (again)...
>
> as far as I am concerned this is the only remaining 'feature' that ruins
> an otherwise perfect station combo.
>
> perhaps the Flex is worth looking at again if this is never going to be
> addressed??
>
>
> On 9/24/2013 9:11 AM, Gary Gregory wrote:
>
>> Your not alone...:-(
>>
>>
>> On 25 September 2013 00:09, Bob <[hidden email]> wrote:
>>
>> So I've been loving my P3 for about 2 years now, and I keep looking at
>>> that
>>> lonely sensor window in the back, dreaming and wishing....
>>>
>>> Yesterday I received an email from a ham a few thousand miles away asking
>>> me to clean up my signal -- I was running JT65 at the time, and he saw my
>>> signal decode on his rig in a half-dozen spots across the waterfall. I
>>> panicked, of course, and immediately checked everything -- Line Level was
>>> four bars steady with an occasional fifth bar flickering, transmit power
>>> was 5.0 watts, monitor was sounding perfectly fine, and my handheld
>>> receiver was sounding OK too. Later that night a nearby ham was nice
>>> enough to run a spectral analysis on my signal and found it looked clean
>>> as
>>> well.
>>>
>>> Imagine how easy it would be for me to verify my outbound signal quality
>>> if
>>> my P3 had an outboard RF sampling tap that communicated via IR back to
>>> the
>>> P3 and allows the outbound RF to be displayed.
>>>
>>> One can dream and wish.
>>>
>>> 73, Bob, WB4SON
>>>
>>
>
> --
>
> GB & 73
> K5OAI
> Sam Morgan
>
> ______________________________**______________________________**__
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>
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>

WB4SON

Re: P3 Feature Request - Transmit sampling

Just to add that three others have replied to me (as opposed to the entire
group) saying they would like to see this too.

I suspect this would be a wildly popular item. I've sort of bought
everything Elecraft has to offer. I need a new accessory to continue
transferring my money to Eric and Wayne (;>

Now I love my KX3, and appreciate all the fine improvements, but my
K3/P3/KAT500/KPA500 is not feeling the love nearly as much.

73, Bob, WB4SON
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73, Bob, WB4SON

N5GE

Re: P3 Feature Request - Transmit sampling

In reply to this post by k5oai

Even if they never add the feature, wouldn't it be better to use a
device like the Kenwood SM-230 monitor, rather than giving up an
excellent XCVR for the sake of monitoring youe signal?

Tom
N5GE

On Tue, 24 Sep 2013 10:03:50 -0500, you wrote:

>I know we aren't suppose to do the 'me to' kind of posts here
>and before hundreds of others add theirs and the topic gets canned
>(again)...
>
>as far as I am concerned this is the only remaining 'feature' that ruins
>an otherwise perfect station combo.
>
>perhaps the Flex is worth looking at again if this is never going to be
>addressed??
>
>On 9/24/2013 9:11 AM, Gary Gregory wrote:
>> Your not alone...:-(
>>
>>
>> On 25 September 2013 00:09, Bob <[hidden email]> wrote:
>>
>>> So I've been loving my P3 for about 2 years now, and I keep looking at that
>>> lonely sensor window in the back, dreaming and wishing....
>>>
>>> Yesterday I received an email from a ham a few thousand miles away asking
>>> me to clean up my signal -- I was running JT65 at the time, and he saw my
>>> signal decode on his rig in a half-dozen spots across the waterfall. I
>>> panicked, of course, and immediately checked everything -- Line Level was
>>> four bars steady with an occasional fifth bar flickering, transmit power
>>> was 5.0 watts, monitor was sounding perfectly fine, and my handheld
>>> receiver was sounding OK too. Later that night a nearby ham was nice
>>> enough to run a spectral analysis on my signal and found it looked clean as
>>> well.
>>>
>>> Imagine how easy it would be for me to verify my outbound signal quality if
>>> my P3 had an outboard RF sampling tap that communicated via IR back to the
>>> P3 and allows the outbound RF to be displayed.
>>>
>>> One can dream and wish.
>>>
>>> 73, Bob, WB4SON

Amateur Radio Operator N5GE

Edward R Cole

Re: P3 Feature Request - Transmit sampling

In reply to this post by WB4SON

I don't have a P3, so my curiosity is only academic.

The "sampling function" being referred to, would bring a low power
sample of transmit power to the P3? This does not seem very
difficult to "roll your own" sampler. I gather the P3 has the needed
RF ckts to receive RF and demod it, or is that also needed?

I use LP-Pan with my K3. The LP-Pan only works in Rx so not really
usable for analyzing the K3's own transmissions. It will work to
look at the KX3, of course. AFAIK the K3 will not work in duplex mode.

I also have a SDR-IQ, which makes a superb spectrum analyzer for
freq. up to 30-MHz. The SDR-IQ only needs a small antenna to "sniff"
enough RF to display the spectrum as wide as 190-KHz or down to <KHz
if looking for IMD. The SDR-IQ can be used as IF Rx for transverters
to extend usable frequency higher. I recently used it to analyze Sun
noise performance of my dish on 1296-MHz and to measure insertion
loss for some coax relays.

Not usual for most ham stations, I also have a surplus HP141T with
plug-ins for 0-1250 MHz and up to 26 GHz.

73, Ed - KL7UW
http://www.kl7uw.com
[hidden email]
"Kits made by KL7UW"

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Steven Kline

Re: P3 Feature Request - Transmit sampling

In reply to this post by N5GE

Hi Tom,

It's become very difficult to locate an SM-230 monitor in the used market and even when you do, they are asking an arm and a leg. I've got a pretty clean one, but I can't find anyone who seems to be able to service the unit. As you state It does do a pretty good job though for monitoring one's transmitted signal and could be an alternative if supply were not the issue. Maybe someone will come up with a simple adjunct 3rd party coupler that can sample the output as well as provide a visual via software, cheaply.

Steve - W5JK

On Sep 24, 2013, at 10:16 AM, Tom wrote:

>
> Even if they never add the feature, wouldn't it be better to use a
> device like the Kenwood SM-230 monitor, rather than giving up an
> excellent XCVR for the sake of monitoring youe signal?
>
> Tom
> N5GE
>
>>>>
>
> ______________________________________________________________
> Elecraft mailing list
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alsopb

Re: P3 Feature Request - Transmit sampling

In reply to this post by Edward R Cole

What if one defined the IF of the P3 to be at some PSK frequency and
connect a loop of wire to it's RF input? Put the loop on the desk.

There might not be enough resolution to clearly see anything but gross
PSK signal infidelities.

73 de Brian/K3KO

On 9/24/2013 16:40, Edward R Cole wrote:

>
> I don't have a P3, so my curiosity is only academic.
>
> The "sampling function" being referred to, would bring a low power
> sample of transmit power to the P3? This does not seem very difficult
> to "roll your own" sampler. I gather the P3 has the needed RF ckts to
> receive RF and demod it, or is that also needed?
>
> I use LP-Pan with my K3. The LP-Pan only works in Rx so not really
> usable for analyzing the K3's own transmissions. It will work to look
> at the KX3, of course. AFAIK the K3 will not work in duplex mode.
>
> I also have a SDR-IQ, which makes a superb spectrum analyzer for freq.
> up to 30-MHz. The SDR-IQ only needs a small antenna to "sniff" enough RF
> to display the spectrum as wide as 190-KHz or down to <KHz if looking
> for IMD. The SDR-IQ can be used as IF Rx for transverters to extend
> usable frequency higher. I recently used it to analyze Sun noise
> performance of my dish on 1296-MHz and to measure insertion loss for
> some coax relays.
>
> Not usual for most ham stations, I also have a surplus HP141T with
> plug-ins for 0-1250 MHz and up to 26 GHz.
>
>
>
> 73, Ed - KL7UW
> http://www.kl7uw.com
> [hidden email]
> "Kits made by KL7UW"
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
>
>
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>
>

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Joe Subich, W4TV-4

Re: P3 Feature Request - Transmit sampling

In reply to this post by Steven Kline

> It's become very difficult to locate an SM-230 monitor in the used
> market and even when you do, they are asking an arm and a leg. I've
> got a pretty clean one, but I can't find anyone who seems to be able
> to service the unit.

A basic transmit monitor (amplitude domain) is extremely easy to make
given an audio scope, "gimmick" capacitor (a couple turns of wire
around the coax), and a small signal diode. I suspect such a device
could be done for a buck using a sound card and off the shelf (free)
audio scope software.

If you're looking for a spectrum analyzer (frequency domain) that's
another issue entirely as that requires some form of frequency
tracking (local oscillator/mixer) and SDR software. However, since
the "receiver" does not need to be particularly sensitive, one could
probably use one of the very inexpensive SDR devices on the market
these days as the core of any spectrum monitor.

I *hope* that whatever solution Elecraft choose for a potential P3
"sensor" option it *does not require the SVGA option*. To me the
SVGA is redundant (I don't need another display, text decode or
another "dedicated" keyboard) and I would be very disappointed to
see that cost be a requirement for either an amplitude or spectrum
scope.

73,

... Joe, W4TV

On 9/24/2013 1:00 PM, Steven Kline wrote:

> Hi Tom,
>
> It's become very difficult to locate an SM-230 monitor in the used market and even when you do, they are asking an arm and a leg. I've got a pretty clean one, but I can't find anyone who seems to be able to service the unit. As you state It does do a pretty good job though for monitoring one's transmitted signal and could be an alternative if supply were not the issue. Maybe someone will come up with a simple adjunct 3rd party coupler that can sample the output as well as provide a visual via software, cheaply.
>
> Steve - W5JK
>
>
> On Sep 24, 2013, at 10:16 AM, Tom wrote:
>
>>
>> Even if they never add the feature, wouldn't it be better to use a
>> device like the Kenwood SM-230 monitor, rather than giving up an
>> excellent XCVR for the sake of monitoring youe signal?
>>
>> Tom
>> N5GE
>>
>>>>>
>>
>> ______________________________________________________________
>> 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
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

KU4AF

Re: P3 Feature Request - Transmit sampling

In reply to this post by alsopb

Resolution would be the same as on received signals - frequency resolution of span/450 and amplitude range 10 - 80 dB. One gotcha is that the P3 only handles IF's up to 21.7 MHz so presumably there would need to be some hardware to allow up to 54 MHz.

I'm also looking forward to a transmit monitoring feature. I hope it will allow viewing the transmitted signal in the time domain, like the traditional "old tech" monitors, as well as frequency domain.

John, KU4AF

Pittsboro, NC<quote author="alsopb">
What if one defined the IF of the P3 to be at some PSK frequency and
connect a loop of wire to it's RF input? Put the loop on the desk.

There might not be enough resolution to clearly see anything but gross
PSK signal infidelities.

73 de Brian/K3KO

Mel

Re: P3 Feature Request - Transmit sampling

In reply to this post by Gary Gregory-2

I would like to state a glitch that happens once in a great while on my P3. It will stay on while transmitting and I see my transmitted signal. If it is a glitch, it must be a SW one because the display hardware is doing its job. Then one would suggest it could be toggled on and off???? What a wonderful thought.... hint hint.....

Mel, K6KBE

________________________________
From: Gary Gregory <[hidden email]>
To: Sam Morgan <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Tuesday, September 24, 2013 8:06 AM
Subject: Re: [Elecraft] P3 Feature Request - Transmit sampling

Sam,

I still believe in the ol saying...the squeeky wheel get's the oil...so
it's good to keep our requests up.

73

On 25 September 2013 01:03, Sam Morgan <[hidden email]> wrote:

--
*Gary - VK1ZZ
Skype: Gary.VK1ZZ
http://www.qsl.net/vk1zz
Motorhome Portable*
*"Grumpy's House"*
*Elecraft K3
KPA500FT
KAT500FT**

*
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Geoffrey Downs-3

Re: P3 Feature Request - Transmit sampling

If you disconnect the RS232 cable between the P3 and the K3, the P3 display
stays on during tx and shows the tx signal. I haven't tried it in digital
modes but it certainly works for CW and SSB. It's a good workaround that has
been mentioned on this reflector in the past.

73 to all

Geoff
G3UCK

-----Original Message-----
From: Mel Farrer
Sent: Tuesday, September 24, 2013 8:49 PM
To: Gary Gregory ; Sam Morgan
Cc: [hidden email]
Subject: Re: [Elecraft] P3 Feature Request - Transmit sampling

I would like to state a glitch that happens once in a great while on my P3.
It will stay on while transmitting and I see my transmitted signal. If it
is a glitch, it must be a SW one because the display hardware is doing its
job. Then one would suggest it could be toggled on and off???? What a
wonderful thought.... hint hint.....

Mel, K6KBE

________________________________
From: Gary Gregory <[hidden email]>
To: Sam Morgan <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Sent: Tuesday, September 24, 2013 8:06 AM
Subject: Re: [Elecraft] P3 Feature Request - Transmit sampling

Sam,

I still believe in the ol saying...the squeeky wheel get's the oil...so
it's good to keep our requests up.

73

On 25 September 2013 01:03, Sam Morgan <[hidden email]> wrote:

> I know we aren't suppose to do the 'me to' kind of posts here
> and before hundreds of others add theirs and the topic gets canned
> (again)...
>
> as far as I am concerned this is the only remaining 'feature' that ruins
> an otherwise perfect station combo.
>
> perhaps the Flex is worth looking at again if this is never going to be
> addressed??
>
>
> On 9/24/2013 9:11 AM, Gary Gregory wrote:
>
>> Your not alone...:-(
>>
>>
>> On 25 September 2013 00:09, Bob <[hidden email]> wrote:
>>
>> So I've been loving my P3 for about 2 years now, and I keep looking at
>>> that
>>> lonely sensor window in the back, dreaming and wishing....
>>>
>>> Yesterday I received an email from a ham a few thousand miles away
>>> asking
>>> me to clean up my signal -- I was running JT65 at the time, and he saw
>>> my
>>> signal decode on his rig in a half-dozen spots across the waterfall. I
>>> panicked, of course, and immediately checked everything -- Line Level
>>> was
>>> four bars steady with an occasional fifth bar flickering, transmit power
>>> was 5.0 watts, monitor was sounding perfectly fine, and my handheld
>>> receiver was sounding OK too. Later that night a nearby ham was nice
>>> enough to run a spectral analysis on my signal and found it looked clean
>>> as
>>> well.
>>>
>>> Imagine how easy it would be for me to verify my outbound signal quality
>>> if
>>> my P3 had an outboard RF sampling tap that communicated via IR back to
>>> the
>>> P3 and allows the outbound RF to be displayed.
>>>
>>> One can dream and wish.
>>>
>>> 73, Bob, WB4SON
>>>
>>
>
> --
>
> GB & 73
> K5OAI
> Sam Morgan
>
> ______________________________**______________________________**__
> Elecraft mailing list
> Home:
> http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft>
> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm>
> Post: mailto:[hidden email].**net <[hidden email]>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Joe Subich, W4TV-4

Re: P3 Feature Request - Transmit sampling

On 9/24/2013 4:44 PM, Geoffrey Downs wrote:
> If you disconnect the RS232 cable between the P3 and the K3, the P3
> display stays on during tx and shows the tx signal.

However, when you do this you are seeing the 8 MHz *IF* signal. You
are not seeing the effect of the final mixer, low power amplifier or
100W amplifier if installed. This "kludge" shows only the effect of
the DSP modulation process - compression and EQ - and does not always
represent the "goodness" of the final transmitted signal.

73,

... Joe, W4TV

On 9/24/2013 4:44 PM, Geoffrey Downs wrote:

> If you disconnect the RS232 cable between the P3 and the K3, the P3
> display stays on during tx and shows the tx signal. I haven't tried it
> in digital modes but it certainly works for CW and SSB. It's a good
> workaround that has been mentioned on this reflector in the past.
>
> 73 to all
>
> Geoff
> G3UCK
>
> -----Original Message----- From: Mel Farrer
> Sent: Tuesday, September 24, 2013 8:49 PM
> To: Gary Gregory ; Sam Morgan
> Cc: [hidden email]
> Subject: Re: [Elecraft] P3 Feature Request - Transmit sampling
>
> I would like to state a glitch that happens once in a great while on my
> P3. It will stay on while transmitting and I see my transmitted signal.
> If it is a glitch, it must be a SW one because the display hardware is
> doing its job. Then one would suggest it could be toggled on and
> off???? What a wonderful thought.... hint hint.....
>
> Mel, K6KBE
>
>
>
>
> ________________________________
> From: Gary Gregory <[hidden email]>
> To: Sam Morgan <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Sent: Tuesday, September 24, 2013 8:06 AM
> Subject: Re: [Elecraft] P3 Feature Request - Transmit sampling
>
>
> Sam,
>
> I still believe in the ol saying...the squeeky wheel get's the oil...so
> it's good to keep our requests up.
>
> 73
>
>
> On 25 September 2013 01:03, Sam Morgan <[hidden email]> wrote:
>
>> I know we aren't suppose to do the 'me to' kind of posts here
>> and before hundreds of others add theirs and the topic gets canned
>> (again)...
>>
>> as far as I am concerned this is the only remaining 'feature' that ruins
>> an otherwise perfect station combo.
>>
>> perhaps the Flex is worth looking at again if this is never going to be
>> addressed??
>>
>>
>> On 9/24/2013 9:11 AM, Gary Gregory wrote:
>>
>>> Your not alone...:-(
>>>
>>>
>>> On 25 September 2013 00:09, Bob <[hidden email]> wrote:
>>>
>>> So I've been loving my P3 for about 2 years now, and I keep looking at
>>>> that
>>>> lonely sensor window in the back, dreaming and wishing....
>>>>
>>>> Yesterday I received an email from a ham a few thousand miles away
>>>> asking
>>>> me to clean up my signal -- I was running JT65 at the time, and he
>>>> saw my
>>>> signal decode on his rig in a half-dozen spots across the waterfall. I
>>>> panicked, of course, and immediately checked everything -- Line
>>>> Level was
>>>> four bars steady with an occasional fifth bar flickering, transmit
>>>> power
>>>> was 5.0 watts, monitor was sounding perfectly fine, and my handheld
>>>> receiver was sounding OK too. Later that night a nearby ham was nice
>>>> enough to run a spectral analysis on my signal and found it looked
>>>> clean
>>>> as
>>>> well.
>>>>
>>>> Imagine how easy it would be for me to verify my outbound signal
>>>> quality
>>>> if
>>>> my P3 had an outboard RF sampling tap that communicated via IR back to
>>>> the
>>>> P3 and allows the outbound RF to be displayed.
>>>>
>>>> One can dream and wish.
>>>>
>>>> 73, Bob, WB4SON
>>>>
>>>
>>
>> --
>>
>> GB & 73
>> K5OAI
>> Sam Morgan
>>
>> ______________________________**______________________________**__
>> Elecraft mailing list
>> Home:
>> http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft>
>>
>> Help:
>> http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm>
>> Post: mailto:[hidden email].**net <[hidden email]>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
>
>

Don Wilhelm-4

Re: P3 Feature Request - Transmit sampling

In reply to this post by Mel

Mel,

Not a 'glitch'.

That is a hardware "artifact". The transmit signal you see is going
through the 8 MHz IF which is being sampled by the P3.

So yes, you see your transmitted signal, but before it gets to the mixer
and on-frequency RF stages.

It should still be useful for seeing that your audio levels and the
modulation is OK, but it will not show you if the final RF output is
still OK. If all is working OK in the K3 (RF wise), then that is a good
indication, but should the RF stages go non-linear (or other condition)
because of some fault, that will not be seen on the P3.

73,
Don W3FPR

On 9/24/2013 3:49 PM, Mel Farrer wrote:

> I would like to state a glitch that happens once in a great while on my P3. It will stay on while transmitting and I see my transmitted signal. If it is a glitch, it must be a SW one because the display hardware is doing its job. Then one would suggest it could be toggled on and off???? What a wonderful thought.... hint hint.....
>
> Mel, K6KBE
>
>
>
>
> ________________________________
> From: Gary Gregory <[hidden email]>
> To: Sam Morgan <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Sent: Tuesday, September 24, 2013 8:06 AM
> Subject: Re: [Elecraft] P3 Feature Request - Transmit sampling
>
>
> Sam,
>
> I still believe in the ol saying...the squeeky wheel get's the oil...so
> it's good to keep our requests up.
>
> 73
>
>
> On 25 September 2013 01:03, Sam Morgan <[hidden email]> wrote:
>
>> I know we aren't suppose to do the 'me to' kind of posts here
>> and before hundreds of others add theirs and the topic gets canned
>> (again)...
>>
>> as far as I am concerned this is the only remaining 'feature' that ruins
>> an otherwise perfect station combo.
>>
>> perhaps the Flex is worth looking at again if this is never going to be
>> addressed??
>>
>>
>> On 9/24/2013 9:11 AM, Gary Gregory wrote:
>>
>>> Your not alone...:-(
>>>
>>>
>>> On 25 September 2013 00:09, Bob <[hidden email]> wrote:
>>>
>>> So I've been loving my P3 for about 2 years now, and I keep looking at
>>>> that
>>>> lonely sensor window in the back, dreaming and wishing....
>>>>
>>>> Yesterday I received an email from a ham a few thousand miles away asking
>>>> me to clean up my signal -- I was running JT65 at the time, and he saw my
>>>> signal decode on his rig in a half-dozen spots across the waterfall. I
>>>> panicked, of course, and immediately checked everything -- Line Level was
>>>> four bars steady with an occasional fifth bar flickering, transmit power
>>>> was 5.0 watts, monitor was sounding perfectly fine, and my handheld
>>>> receiver was sounding OK too. Later that night a nearby ham was nice
>>>> enough to run a spectral analysis on my signal and found it looked clean
>>>> as
>>>> well.
>>>>
>>>> Imagine how easy it would be for me to verify my outbound signal quality
>>>> if
>>>> my P3 had an outboard RF sampling tap that communicated via IR back to
>>>> the
>>>> P3 and allows the outbound RF to be displayed.
>>>>
>>>> One can dream and wish.
>>>>
>>>> 73, Bob, WB4SON
>>>>
>> --
>>
>> GB & 73
>> K5OAI
>> Sam Morgan
>>
>> ______________________________**______________________________**__
>> Elecraft mailing list
>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft>
>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm>
>> Post: mailto:[hidden email].**net <[hidden email]>
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>
>

kc2vmp

Re: P3 Feature Request - Transmit sampling

In reply to this post by WB4SON

I am really hoping the "Sensor" port will be used for this! (Soon?)

kc2vmp

On Sep 24, 2013, at 10:09 AM, Bob <[hidden email]> wrote:

Sverre Holm (LA3ZA)

Re: P3 Feature Request - Transmit sampling

In reply to this post by WB4SON

As your post indicates, the splattering of JT65 signals has most likely nothing to do with your transmitter and setup. It is more likely to be due to the specifics of the JT65 display/decoding algorithm than anything else. I have done spectral estimation for some 30+ years and it reminds me very much of the phenomenon called sidelobe leakage. I have commented on that in my blog:
Overmodulated JT65 on HF?

WB4SON wrote

Yesterday I received an email from a ham a few thousand miles away asking
me to clean up my signal -- I was running JT65 at the time, and he saw my
signal decode on his rig in a half-dozen spots across the waterfall.
....
Later that night a nearby ham was nice
enough to run a spectral analysis on my signal and found it looked clean as
well.

Sverre, LA3ZA

K2 #2198, K3 #3391,
LA3ZA Blog: http://la3za.blogspot.com,
LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html

Rick WA6NHC

Re: P3 Feature Request - Transmit sampling

If your neighbor tells you it's clean (and s/he knows how to look) then it's likely the other station at fault. Noise blanking, noise reduction, poor RX audio (over)driving are huge issues that can make any reception look bad.

Bottom line: don't sweat it if your local stations tell you you're clean.

whiners >> /dev/null

73,
Rick wa6nhc

Tiny iPhone 5 keypad, typos are inevitable

> On Sep 25, 2013, at 9:13 AM, "Sverre Holm (LA3ZA)" <[hidden email]> wrote:
>
> As your post indicates, the splattering of JT65 signals has most likely
> nothing to do with your transmitter and setup. It is more likely to be due
> to the specifics of the JT65 display/decoding algorithm than anything else.
> I have done spectral estimation for some 30+ years and it reminds me very
> much of the phenomenon called sidelobe leakage. I have commented on that in
> my blog:
> Overmodulated JT65 on HF?
> <http://la3za.blogspot.no/2013/04/overmodulated-jt65-on-hf.html>
>
>
> WB4SON wrote
>> Yesterday I received an email from a ham a few thousand miles away asking
>> me to clean up my signal -- I was running JT65 at the time, and he saw my
>> signal decode on his rig in a half-dozen spots across the waterfall.
>> ....
>> Later that night a nearby ham was nice
>> enough to run a spectral analysis on my signal and found it looked clean
>> as
>> well.
>
>
>
>
>
> -----
> Sverre, LA3ZA
>
> K2 #2198, K3 #3391,
> LA3ZA Blog: http://la3za.blogspot.com,
> LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/P3-Feature-Request-Transmit-sampling-tp7579177p7579228.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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

Richard Fjeld

Re: P3 Feature Request - Transmit sampling

In reply to this post by WB4SON

This is good to know. I had this same experience on PSK31, and it was trouble at the receiving end because it was happening on other signals as well, while other stations gave me a clean bill of health. I didn't know if it was his soundcard, software, or interface.

Dick, n0ce

----- Original Message -----
From: "Ron D'Eau Claire" <[hidden email]>
To: "Bob" <[hidden email]>
Cc: "Elecraft" <[hidden email]>
Sent: Wednesday, September 25, 2013 11:31:25 AM
Subject: Re: [Elecraft] P3 Feature Request - Transmit sampling

FWIW, overload from a strong local signal can cause much weaker signals to
behave this way. Once amplifier stages in a receiver are driven into
overload, they produce all sorts of mixing products with any signal coming
through. The overloading signal may have been far off frequency, even on
another Ham band, so it was not obvious to the operator.

73, Ron AC7AC

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of kc2vmp
Sent: Wednesday, September 25, 2013 8:34 AM
To: Bob
Cc: Elecraft
Subject: Re: [Elecraft] P3 Feature Request - Transmit sampling

I am really hoping the "Sensor" port will be used for this! (Soon?)

kc2vmp

On Sep 24, 2013, at 10:09 AM, Bob <[hidden email]> wrote:

> So I've been loving my P3 for about 2 years now, and I keep looking at
> that lonely sensor window in the back, dreaming and wishing....
>
> Yesterday I received an email from a ham a few thousand miles away
> asking me to clean up my signal -- I was running JT65 at the time, and
> he saw my signal decode on his rig in a half-dozen spots across the
> waterfall. I panicked, of course, and immediately checked everything
> -- Line Level was four bars steady with an occasional fifth bar
> flickering, transmit power was 5.0 watts, monitor was sounding
> perfectly fine, and my handheld receiver was sounding OK too. Later
> that night a nearby ham was nice enough to run a spectral analysis on
> my signal and found it looked clean as well.
>
> Imagine how easy it would be for me to verify my outbound signal
> quality if my P3 had an outboard RF sampling tap that communicated via
> IR back to the
> P3 and allows the outbound RF to be displayed.
>
> One can dream and wish.
>
> 73, Bob, WB4SON
> ______________________________________________________________
> 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

______________________________________________________________
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Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
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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