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PX3 with "other" I/Q Receiver?

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Charlie - K0CKH

PX3 with "other" I/Q Receiver?

Has anyone used the PX3 Panadapter with a receiver that has I/Q outputs
other than the KX3 such as the Softrock or ??
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tomb18

Re: PX3 with "other" I/Q Receiver?

Hi
It would not work properly as is. I think one would need to send information to the px3 via the serial port to establish the centre frequency, markers, and respond to qsy''s.etc. as well as react to requests coming from the px3.
Assuming these are standard api type commands it could be a possibility. Could be a fun project.
Tom
va2fsq.com

On Jan 27, 2015 5:27 PM, Chas H <[hidden email]> wrote:

>
> Has anyone used the PX3 Panadapter with a receiver that has I/Q outputs
> other than the KX3 such as the Softrock or ??
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pa0pje

Re: PX3 with "other" I/Q Receiver?

I did, it works....

With a Softrock-RX for 30 metres. The LO is an xtal on 40.5 MHz that
produces 10.125 MHz and that shows on the PX3 as 0Hz.
The real problem comes with the need to recalibrate te I/Q phase and
amplitude in order to have a good image rejection.
On -25 kHz I see the DDK9 teleprinter and on +20 kHz I see the average
bunch of data modes and in between: CW sigs.
For me it was merely "try and see what happens" for the KX3 obviously
rocks much better...

73,
Peter - PA0PJE

Op 2015-01-27 23:52 schreef Tom Blahovici:
> Hi
> It would not work properly as is. I think one would need to send information to the px3 via the serial port to establish the centre frequency, markers, and respond to qsy''s.etc. as well as react to requests coming from the px3.
> Assuming these are standard api type commands it could be a possibility. Could be a fun project.
> Tom
> va2fsq.com
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tomb18

Re: PX3 with "other" I/Q Receiver?

In reply to this post by Charlie - K0CKH

Hi Yes but can't you calibrate this out using a signal generator and the px3 calibration facility?
Of course, it appears that the iq correction operates on only a single frequency and does not do frequency based corrections. I could be wrong about this though.
One way to tell is to put a string signal near the left of the display at - 96khz and see if the image is at the extreme left.
Tom
va2fsq.com

On Jan 28, 2015 11:47 AM, "Peter Eijlander (PA0PJE)" <[hidden email]> wrote:

>
> I did, it works....
>
> With a Softrock-RX for 30 metres. The LO is an xtal on 40.5 MHz that
> produces 10.125 MHz and that shows on the PX3 as 0Hz.
> The real problem comes with the need to recalibrate te I/Q phase and
> amplitude in order to have a good image rejection.
> On -25 kHz I see the DDK9 teleprinter and on +20 kHz I see the average
> bunch of data modes and in between: CW sigs.
> For me it was merely "try and see what happens" for the KX3 obviously
> rocks much better...
>
> 73,
> Peter - PA0PJE
>
> Op 2015-01-27 23:52 schreef Tom Blahovici:
> > Hi
> > It would not work properly as is. I think one would need to send information to the px3 via the serial port to establish the centre frequency, markers, and respond to qsy''s.etc. as well as react to requests coming from the px3.
> > Assuming these are standard api type commands it could be a possibility. Could be a fun project.
> > Tom
> > va2fsq.com
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
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> Please help support this email list: http://www.qsl.net/donate.html
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pa0pje

Re: PX3 with "other" I/Q Receiver?

Hi Tom,

The image nulling procedure is built in the PX3. I did not run it in
order not to alter these settings for the KX3 - I merely wanted to
indicate that is is possible. I have the necessary signal generator to
do so, that wasn't the reason not doing this...

73,
Peter

On 2015-01-28 19:22 Tom Blahovici wrote:
> Hi Yes but can't you calibrate this out using a signal generator and the px3 calibration facility?
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