Hi Lief, I really appreciate your suggestions. It seems like I should install LinRad but when I tried a few weeks ago I ended up totally confused with the install process! Can you give me a link to try again? Will it run on my Windows 7 evaluation copy build 7100 (3Ghz Pentium 4) ? Or should I use my old XP system (2 Ghz Celeron)?
73, Chris ZL1BOE --- In [email protected], Leif Asbrink <l...@...> wrote: > > Hi Chris, > > > > I do not understand the purpose of a phase indicator. > > > > It would be hard for me to explain properly with my limited > > technical background but if you try the Sigmira program with the > > phase display running on WWV you should see what I mean. > I have uploaded a page with some high resolution waterfalls of WWV. > It is pretty obvious what a phase indicator would have shown, but > I think the waterfall is far more informative:-) > http://www.sm5bsz.com/linuxdsp/usage/cal10/cal10.htm > > > I find after a bit of practice that I can visually distinguish > > the average phase state from the often complex instantaneous > > phase variations. I think this is because the Sigmira phase > > display contains much more information - both short term > > and longer term phase variations can be seen at the same time. > Yes, and more so in the waterfall. > > > After using the Sigmira calibrate routine I can tune my SDR-IQ > > to read WWV correct to within 1Hz on the frequency display. > By feeding the frequency error (1.1 Hz at 10 MHz => 88Hz for the > Perseus sampling frequency) into the program, the Linrad frequency > scale would be correct within the uncertainty of the ionospheric > propagation frequency shift. > The frequency readout is in 0.1 Hz steps but you could easily > read within 0.01 Hz from the frequency scale if you expand it a little. > > 73 > > Leif / SM5BSZ >
