[hpsdr] Multiple RX issues

[Bob Cowdery]

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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