[hpsdr] Multiple RX issues

[Bob Cowdery]

Just confirmed that the I and Q data for RX4 is all zeros so that has to
be coming out the hardware. Any ideas anyone?

73, Bob G3UKB

On 13/10/2014 20:43, Bob Cowdery wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Warren,
>
> Thanks for the input. I'm only running 48K and I set CuSDR to 48K as
> well. I don't think its running out of steam. CPU is about 10% with 4RX
> and network about 25%, but only goes up to 27% with 5 RX. Still higher
> than I expected though.
>
> The strange thing is that with 4 RX, the first 3 still work correctly
> and there are no dropped packets or sync errors. I've not checked the
> actual data of the 4th RX yet but I'm assuming its all very low numbers
> close to zero as there is no audio and panadapter flat lines at the
> bottom on CuSDR.
>
> Just to see what happened I tried 6 and 7 receivers, still no dropped
> packets, rubbish out the audio and usage 15% CPU 31% network. I still
> think something is going funny in the firmware.
>
> 73, Bob G3UKB
>
>
> On 13/10/2014 19:57, Warren C. Pratt wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi Bob,
>>
>> Perhaps your problem with sync errors when the 5th receiver is enabled
>> is that the 100Mbit interface will not support five receivers at
>> 384K.  IF you are trying that at 384K, you'll need to back down to 192K.
>>
>> I'm not sure I understand exactly what you mean about "no data and
>> thus no audio."  If you are running PowerSDR, it only generates audio
>> for RX1 (and its sub-receiver) and for RX2.  RX3, RX4, and RX5 are
>> used for things such as the stitched panadapter, PureSignal, and
>> diversity reception.  I'm not familiar enough with cuSDR to comment
>> there.
>>
>> Hope that helps.
>>
>> 73,
>> Warren  NR0V
>>
>> On 10/13/2014 11:52 AM, Bob Cowdery wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> Hi,
>>>
>>> I've been playing around with multiple receivers on some software I'm
>>> writing and something strange is going on.
>>>
>>> I can direct audio from each receiver to different local output devices
>>> left/right/both so I can hear what's going on on each RX. Everything is
>>> fine up to 3 receivers, the 4th receiver gives no data and thus no audio
>>> and the 5th starts giving sync errors i.e. the 7f7f7f is not where it
>>> should be.
>>>
>>> I installed and ran up CuSDR32 and I get exactly the same result. I
>>> can't hear what's going on but RX4 has no panadapter output and RX5
>>> continually flashes the sync indicator.
>>>
>>> I've not updated the hardware for a while, using Metis 2.6 and Mercury
>>> 3.4. Anyone know if there are any known issues with these versions?
>>> Failing that is anybody getting receivers above 3 working with those
>>> versions.
>>>
>>> Thanks for any help
>>>
>>> 73 Bob (G3UKB)
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