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Allen Patterson

PX3

When is the PX3 going to be available for shipping?

You mentioned several software-firmware updates for the PX3 that are planned.
What is the general schedule for each of these updates after initial product shipment?
When is the manual for the PX3 going to be available?

73

Allen Patterson, KC7SYR
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Uwe Hermanns

Fwd: PX3

Hi,

is the frequency responce of the KX3-IQ really flat over 250 kHz?

73 de Uwe, DL4AC
---------- Weitergeleitete Nachricht ----------
Von: "Allen Patterson" <[hidden email]>
Datum: 05.04.2014 19:03
Betreff: [Elecraft] PX3
An: "[hidden email]" <[hidden email]>
Cc:

When is the PX3 going to be available for shipping?

You mentioned several software-firmware updates for the PX3 that are
planned.
What is the general schedule for each of these updates after initial
product shipment?
When is the manual for the PX3 going to be available?

73

Allen Patterson, KC7SYR
[hidden email]
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Barry K3NDM

Re: Fwd: PX3

Good question. I have run at 192 KHz. with the sound card I have, a
Steinberg UR22. The display I see using NaP3 shows a non-flat response.
In fact, there are some words about this in the KX3 manual.

73,
Barry
K3NDM

On 4/5/2014 1:07 PM, Uwe Hermanns wrote:

> Hi,
>
> is the frequency responce of the KX3-IQ really flat over 250 kHz?
>
> 73 de Uwe, DL4AC
> ---------- Weitergeleitete Nachricht ----------
> Von: "Allen Patterson" <[hidden email]>
> Datum: 05.04.2014 19:03
> Betreff: [Elecraft] PX3
> An: "[hidden email]" <[hidden email]>
> Cc:
>
> When is the PX3 going to be available for shipping?
>
> You mentioned several software-firmware updates for the PX3 that are
> planned.
> What is the general schedule for each of these updates after initial
> product shipment?
> When is the manual for the PX3 going to be available?
>
> 73
>
> Allen Patterson, KC7SYR
> [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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Nr4c

Re: Fwd: PX3

In reply to this post by Uwe Hermanns

I though I read 200 kHz (like P3). It may not matter about flat because this is a dedicated device so it can correct any deviations in the radio.

Sent from my iPhone
...nr4c. bill

> On Apr 5, 2014, at 1:07 PM, Uwe Hermanns <[hidden email]> wrote:
>
> Hi,
>
> is the frequency responce of the KX3-IQ really flat over 250 kHz?
>
> 73 de Uwe, DL4AC
> ---------- Weitergeleitete Nachricht ----------
> Von: "Allen Patterson" <[hidden email]>
> Datum: 05.04.2014 19:03
> Betreff: [Elecraft] PX3
> An: "[hidden email]" <[hidden email]>
> Cc:
>
> When is the PX3 going to be available for shipping?
>
> You mentioned several software-firmware updates for the PX3 that are
> planned.
> What is the general schedule for each of these updates after initial
> product shipment?
> When is the manual for the PX3 going to be available?
>
> 73
>
> Allen Patterson, KC7SYR
> [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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Barry K3NDM

Re: PX3

In reply to this post by Barry K3NDM

Yep. That what I was questioning. I, too, remembered those words. I also
know it will take more than just inserting an amplifier with inverse
gain characteristics. I know it can be done. However, that doesn't sate
my curiosity as to how they did it. I just hope the solution isn't
proprietary.

73,
Barry
K3NDM

On 4/5/2014 7:14 PM, Walter Underwood wrote:

> Yes. I posted the text from the manual two days ago in the KX3 list.
>
> "The RX I/Q outputs from a receiver are not “flat” over an infinite frequency range; the signal-conversion process results in some slope (decrease in gain) as you move farther from the center frequency. In the case of the KX3, the signal will be reduced by about 2.5 dB at +/- 24 kHz, 4 dB at +/- 48 kHz, and 7 dB at +/- 96 kHz. The spectrum amplitude on the display, including the apparent noise floor of the receiver, will “roll off” by these amounts." (page 26)
>
> I would not be surprised if they corrected for this in the PX3.
>
> wunder
> K6WRU
>
> On Apr 5, 2014, at 1:55 PM, Barry LaZar <[hidden email]> wrote:
>
>> Good question. I have run at 192 KHz. with the sound card I have, a Steinberg UR22. The display I see using NaP3 shows a non-flat response. In fact, there are some words about this in the KX3 manual.
>>
>> 73,
>> Barry
>> K3NDM
>>
>>
>>
>> On 4/5/2014 1:07 PM, Uwe Hermanns wrote:
>>> Hi,
>>>
>>> is the frequency responce of the KX3-IQ really flat over 250 kHz?
>>>
>>> 73 de Uwe, DL4AC
>>> ---------- Weitergeleitete Nachricht ----------
>>> Von: "Allen Patterson" <[hidden email]>
>>> Datum: 05.04.2014 19:03
>>> Betreff: [Elecraft] PX3
>>> An: "[hidden email]" <[hidden email]>
>>> Cc:
>>>
>>> When is the PX3 going to be available for shipping?
>>>
>>> You mentioned several software-firmware updates for the PX3 that are
>>> planned.
>>> What is the general schedule for each of these updates after initial
>>> product shipment?
>>> When is the manual for the PX3 going to be available?
>>>
>>> 73
>>>
>>> Allen Patterson, KC7SYR
>>> [hidden email]
>>> ______________________________________________________________
>>> 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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>>>
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>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>>>
>> ______________________________________________________________
>> Elecraft mailing list
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>> Help: http://mailman.qth.net/mmfaq.htm
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>>
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> --
> Walter Underwood
> [hidden email]
>
>
>
> ______________________________________________________________
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Barry K3NDM

Re: PX3

I was hoping to get a hint from the manual as well as answer a few other
questions, But it isn't on line yet.

The I&Q data coming out of the KX3 is analog. It could be that they are,
in fact, feeding an A/D converter directly. The rest would be just some
software and a look up table. I guess I agree with you that would be the
way to go. It's straight forward.

73,
Barry
K3NDM

On 4/5/2014 7:35 PM, Walter Underwood wrote:

> I bet they digitize it as early as possible, then use an FIR filter to reshape it. Or scale the values after they FFT, since that is already in the frequency domain. The scale values would be a vector of constants, so it would be really fast and wouldn't even add delay (the bane of FIR filters).
>
> wunder
> K6WRU
>
> On Apr 5, 2014, at 6:26 PM, Barry LaZar <[hidden email]> wrote:
>
>> Yep. That what I was questioning. I, too, remembered those words. I also know it will take more than just inserting an amplifier with inverse gain characteristics. I know it can be done. However, that doesn't sate my curiosity as to how they did it. I just hope the solution isn't proprietary.
>>
>> 73,
>> Barry
>> K3NDM
>>
>> On 4/5/2014 7:14 PM, Walter Underwood wrote:
>>> Yes. I posted the text from the manual two days ago in the KX3 list.
>>>
>>> "The RX I/Q outputs from a receiver are not “flat” over an infinite frequency range; the signal-conversion process results in some slope (decrease in gain) as you move farther from the center frequency. In the case of the KX3, the signal will be reduced by about 2.5 dB at +/- 24 kHz, 4 dB at +/- 48 kHz, and 7 dB at +/- 96 kHz. The spectrum amplitude on the display, including the apparent noise floor of the receiver, will “roll off” by these amounts." (page 26)
>>>
>>> I would not be surprised if they corrected for this in the PX3.
>>>
>>> wunder
>>> K6WRU
>>>
>>> On Apr 5, 2014, at 1:55 PM, Barry LaZar <[hidden email]> wrote:
>>>
>>>> Good question. I have run at 192 KHz. with the sound card I have, a Steinberg UR22. The display I see using NaP3 shows a non-flat response. In fact, there are some words about this in the KX3 manual.
>>>>
>>>> 73,
>>>> Barry
>>>> K3NDM
>>>>
>>>>
>>>>
>>>> On 4/5/2014 1:07 PM, Uwe Hermanns wrote:
>>>>> Hi,
>>>>>
>>>>> is the frequency responce of the KX3-IQ really flat over 250 kHz?
>>>>>
>>>>> 73 de Uwe, DL4AC
>>>>> ---------- Weitergeleitete Nachricht ----------
>>>>> Von: "Allen Patterson" <[hidden email]>
>>>>> Datum: 05.04.2014 19:03
>>>>> Betreff: [Elecraft] PX3
>>>>> An: "[hidden email]" <[hidden email]>
>>>>> Cc:
>>>>>
>>>>> When is the PX3 going to be available for shipping?
>>>>>
>>>>> You mentioned several software-firmware updates for the PX3 that are
>>>>> planned.
>>>>> What is the general schedule for each of these updates after initial
>>>>> product shipment?
>>>>> When is the manual for the PX3 going to be available?
>>>>>
>>>>> 73
>>>>>
>>>>> Allen Patterson, KC7SYR
>>>>> [hidden email]
>>>>> ______________________________________________________________
>>>>> 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]
>>>>> ______________________________________________________________
>>>>> 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]
>>>>>
>>>> ______________________________________________________________
>>>> Elecraft mailing list
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>>>> 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]
>>> --
>>> Walter Underwood
>>> [hidden email]
>>>
>>>
>>>
>>> ______________________________________________________________
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>>>
>> ______________________________________________________________
>> Elecraft mailing list
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>> 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]
> --
> Walter Underwood
> [hidden email]
>
>
>
> ______________________________________________________________
> Elecraft mailing list
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>

Alan Bloom-2

Re: PX3

Yes, the I/Q signal from the KX3 goes through an analog buffer directly
into a two-channel analog to digital converter. All processing is then
done digitally by the DSP. Correcting the frequency response is a
simple matter of multiplying the frequency points by the correct number
before they are displayed. It's a good example of something that would
be complicated using analog circuitry but is trivial with a DSP.

Alan N1AL

On 04/05/2014 04:13 PM, Barry LaZar wrote:

> I was hoping to get a hint from the manual as well as answer a few other
> questions, But it isn't on line yet.
>
> The I&Q data coming out of the KX3 is analog. It could be that they are,
> in fact, feeding an A/D converter directly. The rest would be just some
> software and a look up table. I guess I agree with you that would be the
> way to go. It's straight forward.
>
> 73,
> Barry
> K3NDM
>
>
>
> On 4/5/2014 7:35 PM, Walter Underwood wrote:
>> I bet they digitize it as early as possible, then use an FIR filter to
>> reshape it. Or scale the values after they FFT, since that is already
>> in the frequency domain. The scale values would be a vector of
>> constants, so it would be really fast and wouldn't even add delay (the
>> bane of FIR filters).
>>
>> wunder
>> K6WRU
>> On Apr 5, 2014, at 6:26 PM, Barry LaZar <[hidden email]> wrote:
>>
>>> Yep. That what I was questioning. I, too, remembered those words. I
>>> also know it will take more than just inserting an amplifier with
>>> inverse gain characteristics. I know it can be done. However, that
>>> doesn't sate my curiosity as to how they did it. I just hope the
>>> solution isn't proprietary.
>>>
>>> 73,
>>> Barry
>>> K3NDM
>>>
>>> On 4/5/2014 7:14 PM, Walter Underwood wrote:
>>>> Yes. I posted the text from the manual two days ago in the KX3 list.
>>>>
>>>> "The RX I/Q outputs from a receiver are not “flat” over an infinite
>>>> frequency range; the signal-conversion process results in some slope
>>>> (decrease in gain) as you move farther from the center frequency. In
>>>> the case of the KX3, the signal will be reduced by about 2.5 dB at
>>>> +/- 24 kHz, 4 dB at +/- 48 kHz, and 7 dB at +/- 96 kHz. The spectrum
>>>> amplitude on the display, including the apparent noise floor of the
>>>> receiver, will “roll off” by these amounts." (page 26)
>>>>
>>>> I would not be surprised if they corrected for this in the PX3.
>>>>
>>>> wunder
>>>> K6WRU
>>>>
>>>> On Apr 5, 2014, at 1:55 PM, Barry LaZar <[hidden email]> wrote:
>>>>
>>>>> Good question. I have run at 192 KHz. with the sound card I have, a
>>>>> Steinberg UR22. The display I see using NaP3 shows a non-flat
>>>>> response. In fact, there are some words about this in the KX3 manual.
>>>>>
>>>>> 73,
>>>>> Barry
>>>>> K3NDM
>>>>>
>>>>>
>>>>>
>>>>> On 4/5/2014 1:07 PM, Uwe Hermanns wrote:
>>>>>> Hi,
>>>>>>
>>>>>> is the frequency responce of the KX3-IQ really flat over 250 kHz?
>>>>>>
>>>>>> 73 de Uwe, DL4AC
>>>>>> ---------- Weitergeleitete Nachricht ----------
>>>>>> Von: "Allen Patterson" <[hidden email]>
>>>>>> Datum: 05.04.2014 19:03
>>>>>> Betreff: [Elecraft] PX3
>>>>>> An: "[hidden email]" <[hidden email]>
>>>>>> Cc:
>>>>>>
>>>>>> When is the PX3 going to be available for shipping?
>>>>>>
>>>>>> You mentioned several software-firmware updates for the PX3 that are
>>>>>> planned.
>>>>>> What is the general schedule for each of these updates after initial
>>>>>> product shipment?
>>>>>> When is the manual for the PX3 going to be available?
>>>>>>
>>>>>> 73
>>>>>>
>>>>>> Allen Patterson, KC7SYR
>>>>>> [hidden email]
>>>>>> ______________________________________________________________
>>>>>> 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]
>>>>>> ______________________________________________________________
>>>>>> 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]
>>>>>>
>>>>> ______________________________________________________________
>>>>> 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]
>>>> --
>>>> Walter Underwood
>>>> [hidden email]
>>>>
>>>>
>>>>
>>>> ______________________________________________________________
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>>>> This list hosted by: http://www.qsl.net
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>>>>
>>> ______________________________________________________________
>>> Elecraft mailing list
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>>> This list hosted by: http://www.qsl.net
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>>> Message delivered to [hidden email]
>> --
>> Walter Underwood
>> [hidden email]
>>
>>
>>
>> ______________________________________________________________
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>
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>

Edward R Cole

Re: PX3

In reply to this post by Allen Patterson

Don,

I mistook the statement: > Will it support both 0 ans 8 kHz
"IF"?< to be 8-MHz and knowing the K3 IF to be 8.215 MHz jumped to a
wrong conclusion. I would have known had I first read the
announcement. You are the fifth person to notify me of my error.

Since the PX3 takes audio baseband IQ input, I would guess any SDR*
outputting enough bandwidth would work. For example the LP-Pan which
I believe has 400-kHz bw available. The usual bw restriction is with
the soundcard if one is using a computer to connect to the KX3 IQ
output. *The SDR-IQ would not work since it does not output audio
baseband, so using a SDR depends? Ordinary monaural audio will not
work...has to be IQ. (Wayne correct any errors with my guessing)

So, since I do use two separate LP-Pan with my K3 and KRX3, the PX3
might work with their output. Audio level requirements might be a
consideration, but I suspect that is OK since the KX3 is designed
with that in mind.

My thought was how there might be an incentive to get the PX3 if one
had both radios.

73, Ed - KL7UW
------------------
From: Don Wilhelm <[hidden email]>
To: [hidden email]
Subject: Re: [Elecraft] PX3
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Ed,

In my current ignorance, I don't know if the PX3 has an RF input. The
literature says it uses the RX I/Q as input - which means it will not
handle the 8 MHz IF output of the K3.
It may be possible if one feeds the K3 IF output to an SDR device
(Softrock RX, LP-Pan, SDR-IQ, etc) which does have I/Q outputs, but who
knows at this time.

At this point, it is only speculation on my part.

73,
Don W3FPR

On 4/5/2014 2:56 PM, Edward R Cole wrote:
> So that sounds like it can be used with the 1st IF of the K3. Having
> both radios that makes the PX3 even more attractive. Size is really
> nice for portable operating with KX3. And feed thru of computer
> control of KX3, nice!

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

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