[hpsdr] Demo / Simulation Mode?

[John Marvin]

What you want might be possible, with one major exception. Are you 
expecting to be able to change the VFO A frequency and hear different 
things? That would be more difficult because when you change VFO A, 
PowerSDR is relying on the hardware to change the center frequency, 
which won't do anything if you are just playing a file, no matter what 
method you use to do it. For that scenario to work you would need 
something outside of PowerSDR doing DSP for you.

If you are OK with a demo mode where you change VFO A and the frequency 
changes but the band display doesn't move (and what you hear doesn't 
change), then that is somewhat easier. If you really want to dial around 
(or click around) and hear different things you could enable either 
click tuning or a subreceiver (MultiRX using VFO B). In those cases 
PowerSDR doesn't change the center frequency using the hardware and 
instead does its own DSP internally to extract the signal (from within 
the signal slice(s) chosen by VFO A). That kind of emulation would be a 
lot simpler to do, but that might not meet your needs.

John
AC0ZG

On 9/7/2014 4:35 PM, VaibhaV Sharma wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Sorry, but I am still confused here.
>
> I need a running instance of PowerSDR / OpenHPSDR with simulated data so that I can demonstrate serial control commands to do the following -
>
> * Change VFO frequency
> * Change filter bandwidth
> * Start / Stop Radio
> * Etc.
>
> How can I do this with a recorded I/Q file being played back?
>
> Here is what I have tried till now -
> * Recorded my own wav file in PowerSDR recording UI
> * Played it back but it switches the pan adapter and waterfall display to as if it is transmitting (it does not transmit though)
> * I can hear the recorded audio back but cannot scroll around the band during playback
>
> I also downloaded some pre-recorded I/Q wav files from the web but when I play them back, the waterfall and pan adapter display is all weird. The entire visible spectrum is filled up with incoming transmissions. I can hear the audio fine but the display does not look right.
>
> Any suggestions?
>
> Thanks,
>
> —
> VaibhaV Sharma
> W7VAI
>
>


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