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P3IQ

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wayne burdick

P3IQ

Administrator

Nice explanation, Don.

However, when we do an I/Q add-on for the P3, it will be fully digital (like a USB sound card), not analog (like the KX3’s RX I/Q outputs).

These digital signals already exist in the P3; we just need to repackage them for use with a computer.

Wayne
N6KR

Don Wilhelm wrote:

> The KX3 has I/Q signals (and I/Q outputs) because the I/Q signals are at baseband (audio frequency spectrum). ....

> The current fact is that the K3 I/Q signals exist, but they are only in the digital world. The P3 does extract them, but for purposes of the P3, they remain in the digital world.
> Getting those signals into the analog world will take some work and design effort. It is more complex than a digital to analog converter.

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DL4ZBG

Re: P3IQ

Hi Wayne,

as you stated, we only need it digital (e.g. USB)....
What bandwidth shall be available - 96 kHz

TNX

Volker

DL4ZBG

-----Original-Nachricht-----
Betreff: [Elecraft] P3IQ
Datum: 2018-07-28T15:31:42+0200
Von: "Wayne Burdick" <[hidden email]>
An: "[hidden email]" <[hidden email]>

Nice explanation, Don.

However, when we do an I/Q add-on for the P3, it will be fully digital (like a USB sound card), not analog (like the KX3’s RX I/Q outputs).

These digital signals already exist in the P3; we just need to repackage them for use with a computer.

Wayne
N6KR

Don Wilhelm wrote:

> The KX3 has I/Q signals (and I/Q outputs) because the I/Q signals are at baseband (audio frequency spectrum). ....

> The current fact is that the K3 I/Q signals exist, but they are only in the digital world. The P3 does extract them, but for purposes of the P3, they remain in the digital world.
> Getting those signals into the analog world will take some work and design effort. It is more complex than a digital to analog converter.

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Dave Fugleberg

Re: P3IQ

In reply to this post by wayne burdick

Aha, NOW the proposed add on module makes sense to me... assuming one
already has a P3 (as I do), adding this will make the P3 appear as a USB
device to SDR software on a PC (much like a SDRPlay or RTL SDR dongle.
Correct?

What will be the advantages of this versus connecting a SDRPlay, etc to the
P3 IF Out?
On Sat, Jul 28, 2018 at 8:31 AM Wayne Burdick <[hidden email]> wrote:

> Nice explanation, Don.
>
> However, when we do an I/Q add-on for the P3, it will be fully digital
> (like a USB sound card), not analog (like the KX3’s RX I/Q outputs).
>
> These digital signals already exist in the P3; we just need to repackage
> them for use with a computer.
>
> Wayne
> N6KR
>
> Don Wilhelm wrote:
>
> > The KX3 has I/Q signals (and I/Q outputs) because the I/Q signals are at
> baseband (audio frequency spectrum). ....
>
> > The current fact is that the K3 I/Q signals exist, but they are only in
> the digital world. The P3 does extract them, but for purposes of the P3,
> they remain in the digital world.
> > Getting those signals into the analog world will take some work and
> design effort. It is more complex than a digital to analog converter.
>
> ______________________________________________________________
> 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]

Don Wilhelm

Re: P3IQ

Dave,

My opinion is that there is no need for the SDRPlay, and you can have
better integration with the K3/P3.

73,
Don W3FPR

On 7/28/2018 10:11 AM, Dave Fugleberg wrote:

> Aha, NOW the proposed add on module makes sense to me... assuming one
> already has a P3 (as I do), adding this will make the P3 appear as a
> USB device to SDR software on a PC (much like a SDRPlay or RTL SDR
> dongle. Correct?
>
> What will be the advantages of this versus connecting a SDRPlay, etc
> to the P3 IF Out?
> On Sat, Jul 28, 2018 at 8:31 AM Wayne Burdick <[hidden email]
> <mailto:[hidden email]>> wrote:
>
> Nice explanation, Don.
>
> However, when we do an I/Q add-on for the P3, it will be fully
> digital (like a USB sound card), not analog (like the KX3’s RX I/Q
> outputs).
>
> These digital signals already exist in the P3; we just need to
> repackage them for use with a computer.
>
> Wayne
> N6KR
>
> Don Wilhelm wrote:
>
> > The KX3 has I/Q signals (and I/Q outputs) because the I/Q
> signals are at baseband (audio frequency spectrum). ....
>
> > The current fact is that the K3 I/Q signals exist, but they are
> only in the digital world. The P3 does extract them, but for
> purposes of the P3, they remain in the digital world.
> > Getting those signals into the analog world will take some work
> and design effort. It is more complex than a digital to analog
> converter.
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
> <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] <mailto:[hidden email]>
>

Clay Autery-2

Re: P3IQ

In reply to this post by DL4ZBG

96kHz? I get 200kHz in the P3 now.... most decent audio interfaces are
192kHz....

I would set 192kHz as the MINIMUM spec.

______________________
Clay Autery, KY5G
(318) 518-1389

On 28-Jul-18 09:06, [hidden email] wrote:

> Hi Wayne,
>
> as you stated, we only need it digital (e.g. USB)....
> What bandwidth shall be available - 96 kHz
>
> TNX
>
> Volker
>
> DL4ZBG
>
>
>
> -----Original-Nachricht-----
> Betreff: [Elecraft] P3IQ
> Datum: 2018-07-28T15:31:42+0200
> Von: "Wayne Burdick" <[hidden email]>
> An: "[hidden email]" <[hidden email]>
>
> Nice explanation, Don.
>
> However, when we do an I/Q add-on for the P3, it will be fully digital (like a USB sound card), not analog (like the KX3’s RX I/Q outputs).
>
> These digital signals already exist in the P3; we just need to repackage them for use with a computer.
>
> Wayne
> N6KR
>
> Don Wilhelm wrote:
>
>> The KX3 has I/Q signals (and I/Q outputs) because the I/Q signals are at baseband (audio frequency spectrum). ....
>
>> The current fact is that the K3 I/Q signals exist, but they are only in the digital world. The P3 does extract them, but for purposes of the P3, they remain in the digital world.
>> Getting those signals into the analog world will take some work and design effort. It is more complex than a digital to analog converter.
> ______________________________________________________________
> 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]

Clay Autery-2

Re: P3IQ

In reply to this post by Don Wilhelm

The ability to manipulate the signals via software is a plus, and if it
is done in software, one could also integrate the software via Win4K3 /
com0com for CAT integration.... multiple ways to skin the "cat". <smile>

73,

______________________
Clay Autery, KY5G
(318) 518-1389

On 28-Jul-18 10:01, Don Wilhelm wrote:

> Dave,
>
> My opinion is that there is no need for the SDRPlay, and you can have
> better integration with the K3/P3.
>
> 73,
> Don W3FPR
>
> On 7/28/2018 10:11 AM, Dave Fugleberg wrote:
>> Aha, NOW the proposed add on module makes sense to me... assuming one
>> already has a P3 (as I do), adding this will make the P3 appear as a
>> USB device to SDR software on a PC (much like a SDRPlay or RTL SDR
>> dongle. Correct?
>>
>> What will be the advantages of this versus connecting a SDRPlay, etc
>> to the P3 IF Out?
>> On Sat, Jul 28, 2018 at 8:31 AM Wayne Burdick <[hidden email]
>> <mailto:[hidden email]>> wrote:
>>
>>     Nice explanation, Don.
>>
>>     However, when we do an I/Q add-on for the P3, it will be fully
>>     digital (like a USB sound card), not analog (like the KX3’s RX I/Q
>>     outputs).
>>
>>     These digital signals already exist in the P3; we just need to
>>     repackage them for use with a computer.
>>
>>     Wayne
>>     N6KR
>>
>>     Don Wilhelm wrote:
>>
>>     > The KX3 has I/Q signals (and I/Q outputs) because the I/Q
>>     signals are at baseband (audio frequency spectrum). ....
>>
>>     > The current fact is that the K3 I/Q signals exist, but they are
>>     only in the digital world. The P3 does extract them, but for
>>     purposes of the P3, they remain in the digital world.
>>     > Getting those signals into the analog world will take some work
>>     and design effort. It is more complex than a digital to analog
>>     converter.

David Gilbert

Re: P3IQ

In reply to this post by wayne burdick

I never understood why the P3 didn't have I/Q outputs in the first
place, and I remember pleading for them well before the P3 was
finalized. It never made sense to me to have to have to add additional
hardware to make use of other software that used I/Q outputs when the P3
clearly generated them internally.

Dave AB7E

On 7/28/2018 6:30 AM, Wayne Burdick wrote:

>> The KX3 has I/Q signals (and I/Q outputs) because the I/Q signals are at baseband (audio frequency spectrum). ....
>
>> The current fact iNice explanation, Don.
>>
>> However, when we do an I/Q add-on for the P3, it will be fully digital (like a USB sound card), not analog (like the KX3’s RX I/Q outputs).
>>
>> These digital signals already exist in the P3; we just need to repackage them for use with a computer.
>>
>> Wayne
>> N6KR

wayne burdick

Re: P3IQ

Administrator

To use the P3’s I/Q signals with software applications, you have to format the data like a USB sound card, a standard that is widely used and requires no special drivers. A significant amount of firmware is required at the P3 end, but we’re definitely looking at this.

In answer to an earlier question: The P3 uses a very high-performance A-to-D converter, so the I/Q stream will have excellent dynamic characteristics (once we get it out of the box :)

Wayne
N6KR

> On Jul 28, 2018, at 9:31 AM, David Gilbert <[hidden email]> wrote:
>
>
> I never understood why the P3 didn't have I/Q outputs in the first place, and I remember pleading for them well before the P3 was finalized. It never made sense to me to have to have to add additional hardware to make use of other software that used I/Q outputs when the P3 clearly generated them internally.
>
> Dave AB7E
>
>
>
> On 7/28/2018 6:30 AM, Wayne Burdick wrote:
>>> The KX3 has I/Q signals (and I/Q outputs) because the I/Q signals are at baseband (audio frequency spectrum). ....
>>
>>> The current fact iNice explanation, Don.
>>>
>>> However, when we do an I/Q add-on for the P3, it will be fully digital (like a USB sound card), not analog (like the KX3’s RX I/Q outputs).
>>>
>>> These digital signals already exist in the P3; we just need to repackage them for use with a computer.
>>>
>>> Wayne
>>> N6KR

DL4ZBG

Re: P3IQ

Hello Wayne,

are you still planning "to get it out of the box"?

tnx

Volker

DL4ZBG

-----Original-Nachricht-----
Betreff: Re: [Elecraft] P3IQ
Datum: 2018-07-28T18:45:02+0200
Von: "Wayne Burdick" <[hidden email]>
An: "David Gilbert" <[hidden email]>

To use the P3’s I/Q signals with software applications, you have to format the data like a USB sound card, a standard that is widely used and requires no special drivers. A significant amount of firmware is required at the P3 end, but we’re definitely looking at this.

In answer to an earlier question: The P3 uses a very high-performance A-to-D converter, so the I/Q stream will have excellent dynamic characteristics (once we get it out of the box :)

Wayne
N6KR

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