[hpsdr] Hpsdr Digest, Vol 126, Issue 21

[pa5bw]

Hi John,

Thanks! We really need the dual receiver of the ANAN-200D, as we connect 
two perpendicular inverted vee dipoles to the 2 ADC's with separate feed 
lines. So if that will be implemented later, we would be extremely 
thankful if you would include the dual channel WAV recording option. 3 
or 6 kS/s would already help us, and streaming to an external SSD drive 
via a USB port would be OK, as N9VV also suggested. So I guess will have 
to wait patiently on that.

With our current setup we use PowerSDR on a Windows miniPC we record two 
streams of 6 kSamples/second from the ANAN-200D to a SSD disk. We 
calibrate the phase difference between both receivers by measuring an 
external source via a power splitter. Offline we process the data and 
add 90 and 270 degrees phase difference to obtain LHCP and RHCP streams. 
Using this setup we have done (published) scientific research on 
separate transmission of LHCP and RHCP on the same frequency with 7 MHz 
NVIS propagation. And proven a large (25 dB) isolation between the two 
streams on 1 frequency.

I know your work on piHPSDR is all done in spare time, so a lot of 
respect to you, and thanks for your "present" to the HPSDR comunity.

73, Ben PE5B / PA5BW


> ------------------------------
> 
> Message: 2
> Date: Tue, 30 Aug 2016 18:11:24 +0100
> From: John Melton <john.d.melton at googlemail.com>
> To: pa5bw <pa5bw at xs4all.nl>, hpsdr at lists.openhpsdr.org
> Subject: Re: [hpsdr] Will piHPSDR have WAV recording possibility?
> Message-ID: <5fcdb19f-1d76-e585-3544-819976183425 at googlemail.com>
> Content-Type: text/plain; charset=windows-1252; format=flowed
> 
> Hi Ben,
> 
> I currently do not have any plans to add the recording capability, but
> it would not be very difficult.  I currently only support 1 receiver in
> this code because we are just trying to get a basic transceiver running
> on a small RPi.
> 
> However, there is some work in progress (but slowly) to upgrade ghpsdr
> to use WDSP and the new protocol. This would make more sense as the
> place to add this.
> 
> -- John
> 
> On 30/08/16 15:20, pa5bw wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>> 
>> Dear John,
>> 
>> My compliments for adding a practical user interface to the HPSDR,
>> making the superb HPSDR radio easier to use in the field. For I field
>> measurements we now use a 12VDC miniPC, which we would gladly replace
>> by a piHPSDR...
>> 
>> ... provided the piHPSDR software includes the possibility to record a
>> WAV-file containing the IQ-data of the two ADC's. We use that in our
>> scientific experiments to measure circular polarization on HF. And we
>> have several other field measurements in planning.
>> 
>> Is it known already whether piHPSDR has or will have such dial channel
>> WAV-recording?
>> 
>> 73, Ben - PE5B / PA5BW
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> 
> 
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> ------------------------------
> 
> End of Hpsdr Digest, Vol 126, Issue 21
> **************************************