[hpsdr] How to get WSPR working via VAC?

[Ben Witvliet]

Hello all,

I have difficulty to get WSPR reception working via VAC (trial version). 

I have  Atlas and Mercury-Eu working well with PowerSDR PowerSDR (v1.10.4+
BaseSVN 2025). Previously I connected the analog audio output of Mercury to
the analog input of the computer soundcard and WSPR 2.11. I then had -30 dB
rx noise, lots of WSPR signals on 40m and a lot of decodes, even with weak
DX signals. 

I then installed with VAC (4.10.0.2536 trial). I have setup two Virtual
Audio Cables. I set the PowerSDR audio output as Virtual Cable 2, and WSPR
audio input as Virtual Cable 2.  In the VAC Control Panel I set Virtual
Cable 2 as follows: Max.instance 20, Ms per int 5, SR range 11025..96000,
BPS range 8..32, Stream format Cable range, Volume control disabled. With
PowerSDR and WSPR started, it reads SR 48000, BPS 32, NC 2, Rc stms 1, Pb
stms 1.

I see the Overflow counter increase nearly 1 per second, Underflow is on 42
and steady. In WSPR I see Rx noise at -28dB and I see a waterfall and some
transmissions from time to time, but nothing is decoded. 

Please you advice!

73, Ben PA5BW pa5bw at xs4all.nl

 

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