[hpsdr] More Strange Behavior PowerSDR 1.19.3.2 , K7SR

[Mike F]

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>
> To: <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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>>
>>
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>

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