HDSDR Mirrored spectrum

[Ozy]

I followed the guide on HDSDR's website for the KX3 and it IS working, but it is odd vs all my other SDR radios.   The RF seems mirrored on both sides of the center DC spike.   Is this normal?

I'm using an iMic with the RXIQ setup using the HDSDR KX3 guide exactly.  Tuning works great.  Input sampling rate of 48K.

https://www.dropbox.com/s/jx6tpp29olg2tci/Screenshot%202013-12-08%2016.52.45.png
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[Mike WA8BXN]

Mirror images generally mean you are not getting both I and Q audio into the
program. Most common cause is not having stereo input on sound card on
computer but iMic is stereo. I would check cable.

 

73 - Mike WA8BXN

 

 

 

 

-------Original Message-------

 

From: Chris Johnson

Date: 12/8/2013 7:01:29 PM

To: Elecraft Reflector

Subject: [Elecraft] HDSDR Mirrored spectrum

 

I followed the guide on HDSDR's website for the KX3 and it IS working, but
it is odd vs all my other SDR radios. The RF seems mirrored on both sides of
the center DC spike. Is this normal?

 

I'm using an iMic with the RXIQ setup using the HDSDR KX3 guide exactly.
Tuning works great. Input sampling rate of 48K.

 

https://www.dropbox.com/s/jx6tpp29olg2tci/Screenshot%202013-12-08%2016.52.45
png

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[pa0pje]

Options menu (F7) > Swap I and Q channels fixes that fast...
But be aware that all cables should be wired so, that I and Q are
connected the same way to the L and R line inputs of the sound card.

73,
Peter

Op 2013-12-09 1:00 schreef Chris Johnson:

> I followed the guide on HDSDR's website for the KX3 and it IS working, but it is odd vs all my other SDR radios.   The RF seems mirrored on both sides of the center DC spike.   Is this normal?
>
> I'm using an iMic with the RXIQ setup using the HDSDR KX3 guide exactly.  Tuning works great.  Input sampling rate of 48K.
>
> https://www.dropbox.com/s/jx6tpp29olg2tci/Screenshot%202013-12-08%2016.52.45.png
> ______________________________________________________________
> 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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[Ozy]

That was it.  The iMic had a loose connection on the R channel in the mic/line switch.   After playing with the cables, it started working properly.  

On Dec 8, 2013, at 5:14 PM, Mike WA8BXN <[hidden email]> wrote:

> Mirror images generally mean you are not getting both I and Q audio into the
> program. Most common cause is not having stereo input on sound card on
> computer but iMic is stereo. I would check cable.
>
> 73 - Mike WA8BXN
>
>
>
>
> -------Original Message-------
>
> From: Chris Johnson
> Date: 12/8/2013 7:01:29 PM
> To: Elecraft Reflector
> Subject: [Elecraft] HDSDR Mirrored spectrum
>
> I followed the guide on HDSDR's website for the KX3 and it IS working, but
> it is odd vs all my other SDR radios. The RF seems mirrored on both sides of
> the center DC spike. Is this normal?
>
> I'm using an iMic with the RXIQ setup using the HDSDR KX3 guide exactly.
> Tuning works great. Input sampling rate of 48K.
>
> https://www.dropbox.com/s/jx6tpp29olg2tci/Screenshot%202013-12-08%2016.52.45
> png
> ______________________________________________________________

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[vk4tux]

I had similar issue. i used a 3.5mm to 2.5mm audio cable (each end three
segment), from a Yaesu SCU-39 cable kit I was not using which looked perfect
for the job.

However it turned out the centre segment was not wired, with same results as
above. Initially I thought my line-in was possibly not stereo on rear of my
Dell PC as it is a combo pink/blue mic/line in jack.

Found a stereo 3.5mm cable and luckily a 2.5/2.5mm adaptor for one end.
Looking much better, the display better than any of several others I have
tried incl non free.

I have found the Omni-rig cat control a little buggy sometimes, losing mode
control, and freq readout offset.
Re; setup and restart seems to get it back good.

Early days, and I think i just need more practice. I am using a realtek
sound card at the moment set 192KHz, and have ordered an ASUS Xonar U7 and
an stereo isolation lit with audio lines.

I would like a PX3 , however not at current pricing, and looking at a used
unit if some one is selling.

Adrian ... vk4tux



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