[hpsdr] FreeDV, PowerSDR and Penelope

[Michael Carey]

Thanks to all for you replies.

The main issue I had (which was a forehead slap for me) was that I had 
different sample rates between the Radio and Microphone/Speaker "sound 
cards.  Once I changed this everything settled down nicely.  I can now 
receive & transmit fine with FreeDV and my PowerSDR/HPSDR setup.

I do have the latest firmware in my SM1000 and am most impressed with 
700D.  Audio going from the PC to the SM1000 does sound a better to my 
ear, probably due to me using a R0DE Podcaster microphone, which cost 
more than the SM1000 all up! :-)  I'm sure if I use a better outboard 
microphone on the SM1000 it would sound better.

I'm still working on an outboard RF amplifier for my HPSDR, I'll be 
using an old Codan 4404 400W RFPA that spent a lot of it's life on a 
fishing board.  The 500mW from Penelope is a bit limiting, but has 
worked well with WSPR tests on both 30m and 40m.  It's amazing how far 
you can make 500mW go with WSPR.

I saw David VK5DGR give a demo of FreeDV 2020 at an AREG meeting, most 
impressive!

73

Michael
VK5ZEA

On 28/10/2019 3:23 am, walterh at k5wh.net wrote:
> Michael,
>
>   As Scott mentioned, that is one of the normal false signals you get at times on FreeDV.
>
> Are you using the latest SM1000 firmware that was released just a couple months ago?
>
> There is also a new 1.4 version of FreeDV we are testing that has some further enhancements and a couple NEW modes as well, like 2020 and 2400b, etc...
>
> Join us on the http://qso.freedv.org site to chat with others using FreeDV and see if you can make some live contacts.
>
> Here in the States we are always on 14.236, but I think you guys use a 40 meter frequency as I recall.
>
> But the QSO-finder site is the best place to sync up with others and where they are operating.
>
> All the best, and hope we get some signals out your way soon.
>
>
> Walter/K5WH
>
> -----Original Message-----
> From: Hpsdr <hpsdr-bounces at lists.openhpsdr.org> On Behalf Of Michael Carey
> Sent: Sunday, October 27, 2019 5:39 AM
> To: hpsdr at lists.openhpsdr.org
> Subject: [hpsdr] FreeDV, PowerSDR and Penelope
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Everybody,
>
> Does anyone in here have any experience with using FreeDV 1600 together with PowerSDR and the OpenHPSDR hardware?
> This weekend I have been trying to get FreeDV working with my HPSDR setup (PowerSDR v3.4.9).
>
> The basics are all working fine, VB Audio's Virtual Audio Cables work great and a pair of Virtual Serial Ports allow CAT control between PowerSDR and the FreeDV software for PTT.  I've used the same setup for decoding DMR and for use with FLdigi/WSPR for some time now.
>
> I am using a Rowetel SM1000 with my Icom IC-7100 to receive the FreeDV.
>
> When transmitting FreeDV 1600 via OpenSDR/Penelope it sort of works, but I am seeing/hearing a regular "glitch" in the transmitted audio that affects decoding via the SM1000.  It doesn't matter if I reduce the VAC audio gain, the glitch is still there.  I believe I've turned off any kind of processing that might affect transmit, but it still isn't as clean as what I can get with the SM1000/IC-7100 setup on transmit.
>
> I've uploaded short unlisted video to my YouTube channel that shows what I am seeing/hearing on transmit.
> https://youtu.be/Fnc4W_ZXC0g
>
> The audio going into the VAC on PowerSDR from the FreeDV software sounds clean when I listen to it, as does the audio when I listen with the PowerSDR MON turned on.
>
> I haven't even looked at the reverse path yet, transmitting on the
> SM1000 and receiving via the HPSDR. One step at at time. :-)
>
> Any ideas?
>
> Michael.
> VK5ZEA
>
>
>
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