[Lowfer] Wolf with SDR-IQ

[Garry Hess]

Short-term frequency jitter precludes copy of narrowband signals like 
Wolf using the SDR-IQ. Does anyone have a different experience? Have 
users found other SDR equipment that works with Wolf?

My SDR-IQ experience is as follows:

While trying to get Winrad to work with the SDR-IQ, an email exchange 
with Jeffrey Pawlan indicated that due to the use of separate 
oscillators for the SDR-IQ and the PC sound card, narrowband signals 
like WSPR, PSK31, etc. would have too much jitter to be copied. Despite 
this issue, the latest SpectraVue and Spectrum Laboratory codes do allow 
copy of narrowband modes down to QRSS-60 with the SDR-IQ and ARGO. 
Perhaps that's because ARGO/QRSS is so forgiving. Although the waterfall 
does display Lowfer sources running QRSS, the displays are 
thinner/weaker than those obtained using an analog radio. That's a hint 
that all is not perfect and software attempts to match the frequencies 
perfectly from two separate sources are noticeable. When a GPS-locked 
reference frequency is measured with Wolf, the output variations over 
time are so large it's clear Wolf can't work well.

Incidentally, a number of problems were encountered using the SDR-IQ 
with SpectraVue 2.34 code. All were solved by the latest beta code, 
SpectraVue 3.

73,
Garry, K3SIW, EN52ta, Elgin, IL