[hpsdr] Multiple RX issues

[Joe Martin K5SO]

Hi Bob, 

Mercury v3.4 implements a maximum of 3 receviers in the firmware.  

Metis_v2.6, which I think you said you are using, allows for 4 receivers, in principle, but that does you no good on the Atlas-based system as Mercury firmware limits the max number of receivers to 3.  

73, Joe K5SO

On Oct 13, 2014, at 2:18 PM, Bob Cowdery wrote:

> ***** High Performance Software Defined Radio Discussion List *****
> 
> 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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