[hpsdr] More Strange Behavior PowerSDR 1.19.3.2 , K7SR

Mon Jan 24 10:10:43 PST 2011

Thanks for responding Dean

I had calibrated both versions of PowerSDR as you describe.  The fact 
that the 1.19.3.2 version appeared to be off by 100hz is probably 
explained by Phil in that I didn't have a source selected for the 10Mhz 
clock.  I had selected a source in the 1.10.4 version.  I need another 
receiver to check that and won't be back to my primary QTH for several 
more days.

The other problem, where the TUN function shows up on the display at the 
offset that is in setup, but is actually not offset in the 1.19.3.2 
version, is still not explained.  In one test I was averaging the 
panadapter display, and as the transmit average died away after going to 
receive mode, the display actually shifted so the dying average was at 
the VCO frequency (did not remain offset).

Thanks

Mike, K7SR

On 1/23/2011 5:49 PM, VAL PROBERT wrote:
> Hi there to all,
> I have experienced a similar effect Mike.
> I went to Setup, Calibration and reset it because there was an offset
> presnt in the bottom left panel.
> Then I tuned to WWV on 10MHz and tuned to where it was right on frequency.
> Then I went again to Calibration and ran both Calibration routines, top
> left and top right panels..
> The offset at the bottom left panel changed slightly and my Rx/Tx was
> spot on frequency.
> This may not be the solution to your question but it fixed mine.
> Good luck.
> Dean VK5LB
>
>
> ------------------------------------------------------------------------
> *From:* Mike F <mikecf100 at gmail.com>
> *To:* Phil Harman <phil at pharman.org>
> *Cc:* hpsdr at lists.openhpsdr.org
> *Sent:* Mon, 24 January, 2011 2:07:30 AM
> *Subject:* Re: [hpsdr] More Strange Behavior PowerSDR 1.19.3.2 , K7SR
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Phil
>
> Thanks for coming back.
>
> The 100 hz transmit frequency error may have been caused by not having
> the source selected. There is some difficulty in checking this out
> without being on the air.
>
> However, after checking penelope as the 10Mhz source, I verified that
> the other noted problem still exists. In fact, I noticed that the
> phenomena can be observed while turning off the TUN mode, the tone on
> the display shifts from the intended tune frequency to the receive
> measured frequency as it dies away. That is: if the system is set at
> 14.18000Mhz with the tune offset set to 600hz, then while tuning the
> display shows 14.180600 for the tone. When TUN is turned off and
> PowerSDR goes back to receive mode, the display of the dying tone shifts
> to 14.18000, the frequency actually heard on the second receiver.
>
> I will have to set up a test to determine if the 100hz xmit shift has
> gone away.
>
> In answer to another question I received, in both versions of PowerSDR
> used in the testing, the mode was set to USB (upper sideband) SSB.
>
> 73
>
> Mike, K7SR
>
> On 1/23/2011 4:41 AM, Phil Harman wrote:
>  > Hi Mike,
>  >
>  > Welcome to the openHPSDR group.
>  >
>  > Regarding the frequency error, did you have the 10MHz source selected
>  > correctly? This is done in PowerSDR under Setup > HPSDR. If you had this
>  > set to Atlas, and did not have a 10MHz reference connected to the Atlas
>  > bus, then the clocks on Mercury and Penelope would not be phase-locked
>  > together. This could cause the frequency error your found.
>  >
>  > 73 Phil... VK6APH
>  >
>  > ----- Original Message ----- From: "Mike F" <mikecf100 at gmail.com
> <mailto:mikecf100 at gmail.com>>
>  > To: <hpsdr at lists.openhpsdr.org <mailto:hpsdr at lists.openhpsdr.org>>
>  > Sent: Saturday, January 22, 2011 11:39 PM
>  > Subject: [hpsdr] More Strange Behavior PowerSDR 1.19.3.2 , K7SR
>  >
>  >
>  >> ***** High Performance Software Defined Radio Discussion List *****
>  >>
>  >> Being new to HPSDR I am experimenting with the various features. I
>  >> have installed two versions of Powersdr on my computer, both from the
>  >> HPSDR svn. These are: "PowerSDR (KD5TED 5jan2011 derived from
>  >> 1.10.4+BaseSVN 2025)" and "PowerSDR 1.19.3.2".
>  >>
>  >> The following problems were observed with 1.19.3.2, and ARE NOT
>  >> present in the KD5TED version.
>  >>
>  >> I was checking the rig while talking to a fellow local ham. He noted
>  >> that when we both were on 14.18000 he had to tune about 100hz high for
>  >> me to not sound donald duck. When he changed frequency he was too low
>  >> pitched on my end. We played for a while and I found that if I set XIT
>  >> to -100 we could operate and both sound good. I then loaded the KD5TED
>  >> version and found that it worked correctly without the offset.
>  >>
>  >> This morning, while conducting further testing, I turned on another
>  >> receiver, tuned to the same frequency as HPSDR. Using 1.19.3.2 when I
>  >> activated tune I heard a low level hum, although my power meter showed
>  >> output. The panadapter display showed a tone about 600hz above the set
>  >> frequency. When I did the same for KD5TED version, the display was the
>  >> same but I heard a clear tone at about the right frequency. I switched
>  >> back to 1.19.3.2 and decided to tune the second receiver off the test
>  >> frequency. Surprise! The tone was exactly at the set frequency, not
>  >> the 600hz offset shown on the display.
>  >>
>  >> Am I missing something. Not being that familiar with the software, I
>  >> am not sure?
>  >>
>  >> Mike, K7SR
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