[hpsdr] HPSDR & Map65-IQ

[John Melton]

Quickly looking at the code for Map65-IQ I can see the following 2 lines
in filbig.f (yes, it is written in Fortran):

!         df=96000.d0/NFFT1
         df=95238.1d0/NFFT1

All other references are to 96000.  I would suspect that the 95238.1 is
a result of testing the actual sample rate of a specific audio card and
changing this back to 96000 would make it work better with HPSDR.

There are a couple of other lines that have been commented out and
values slightly changed which may also need changing back in this file.

No guarantees, but ...

Regards,

John g0orx/n6lyt


On Sat, 2010-12-11 at 08:28 +0800, Phil Harman wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi Mike,
> 
> Thanks for your question.   HPSDR can be set to sample at  (exactly) 
> 48/96/192ksps.
> 
> Does Map65-IQ accept I&A samples directly from the USB interface or  via a 
> soundcard type of interface?
> 
> Sorry but I can't see a way of generating samples at 95238.1 Hz.
> 
> If Joe is interested is supporting HPSDR then I can send him a copy of the 
> data protocol we use over USB.
> 
> 73 Phil...VK6APH
> 
> 
> 
> 
> ----- Original Message ----- 
> From: <wz5q at juno.com>
> To: <Undisclosed-recipients:>
> Cc: <hpsdr at lists.openhpsdr.org>
> Sent: Saturday, December 11, 2010 7:34 AM
> Subject: [hpsdr] HPSDR & Map65-IQ
> 
> 
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > Howdy All,
> > I am new to this forum and also just getting into SDR.
> >
> > I have a question for the group,
> > I have a chance to get a HPSDR.
> > I am into EME and wanted to get a SDR in order to use the Map65-IQ 
> > software.
> > Has anyone gotten the HPSDR to work with the Map65-IQ program written by 
> > Joe, K1JT?
> >
> > Joe said the MAP65-IQ program was designed for use with the SDR-14, 
> > SDR-IQ, and Perseus receivers. For these receivers the baseband sample 
> > rate can be set to 95238.1 Hz, which is needed by MAP65-IQ.
> >
> > He also said that the Flex xxxx receivers can use a 96000 Hz sample rate, 
> > which is close to 95238.1 -- close enough for MAP65-IQ to appear to be 
> > working, but not close enough for it to decode JT65 signals with full 
> > sensitivity.
> >
> > Being that the HPSDR uses the PowerSDR will this become a problem?
> >
> > SDR is new to me, so pardon my ignorance in the matter if the answers seem 
> > to be obvious.
> > Thank You for your time.
> >
> > Mike
> > WZ5Q
> >
> >
> > ____________________________________________________________
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