[hpsdr] Diversity experience.

[Kjell Karlsen]

Hi Joe.

I have experimented some more with the Diversity. If I suppress the noise  
using CTUN I can then tune to and listen/send on any frequency in the  
shown band segment.

But if I disable CTUN, the noise canceling is lost and the canceling has  
to be done again.

If I do the canceling (in CTUN), then move the frequency 50Hz, then switch  
off and on CTUN and do a new canceling the Phase angle is 90 deg.  
different.

When I cancel the noise on one specific frequency in the middle of the  
shown segment, the noise is canceled in the whole band segment. This is  
true for the 6 noise peaks that come from the same source.

73, Kjell



På Sat, 14 Nov 2015 20:47:11 +0100, skrev Joe Martin <k5so at k5so.com>:

> To be even more clear perhaps I should also say:
>
> When you select Diversity, the frequencies of the two receivers are  
> automatically changed to the frequency of the first receiver and the IQ  
> data stream that was going to the RX1 Display in PowerSDR is changed to  
> show instead a single IQ data stream derived from the combined IQ data  
> streams of both receivers at once, phased according to how you have the  
> phase control set in the Diversity window in PowerSDR.  You do not need  
> to manually assign any frequency to the second receiver, it is done  
> automatically for you when you select the Diversity option in PowerSDR.
>
> 73, Joe K5SO
>
> On Nov 14, 2015, at 12:27 PM, Joe Martin wrote:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi Hagen,
>>
>> In addition to what Kjell correctly said, when Diversity is active  
>> firmware receivers Rx1 (DDC0) and Rx2 (DDC1) are forced to use the same  
>> frequency and phase word.  These two firmware receivers are combined  
>> into a single IQ data stream that is displayed in the RX1 front panel  
>> display in PowerSDR.  You do not need to do anything with the RX2  
>> button or the RX2 display in PowerSDR to run in Diversity mode.
>>
>> As it happens, I am working with the other developers to create a  
>> visual signal path display option, and also a separate standalone  
>> program, that will show you how the rear panel connections of your  
>> radios are releated to the front panel displays in PowerSDR.  I’m about  
>> 2/3 done with the project now but when it is finished and released it  
>> may help with users understanding how rear panel connections, options  
>> selections, and front panel displays are related for any particular  
>> configuration you have set in software from the setup menus.
>>
>> 73, Joe K5SO
>>
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>
>
>


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