Re: [SpectrumLabUsers] Re: Dual conversion 60 Hz rejection Schumann Response Spectrum Lab Receiver.
- Hi Gerry,
Only for the record, since I think you already found the latest version:
If the link to the 'beta' doesn't work, there simply isn't a 'beta' only a stable release.
There is no on-line storage for old versions lacking my own website with gigabytes of storage.
I only keep old versions (along with their sources) on a harddisk.
All the best,
Am 03.05.2013 18:08, schrieb Gerry G.:Wolf,I will try to update the program but darned if I can find it! Either I get dead links or nothing at all. None of the beta links I found work. Do you have a particular place you keep the latest versions? I will put it on as soon as I can find it.. :)Gerry
On Thu, May 2, 2013 at 11:43 AM, wolf_dl4yhf <dl4yhf@...> wrote:Hi Gerry,
Build number 27 is quite old, and a couple of soundcard-related issues have hopefully been fixed in the recent build, which is b33.
Can you try this ?
I don't think you're doing anything wrong. An input buffer overflow is usually caused by too large CPU load. This has been reduced in the recent version, at the expense of a sometimes 'jerky' waterfall scroll.
But better a not-so-smooth scrolling than lost audio samples, or even a stopped processing...
Am 02.05.2013 15:00, schrieb compu_friend:
On SL V2.78 b27 at random I'm getting a hang up error that stops everything dead in the water. The error says.."error # 9051 input buffers over flowed in Soundinclose". I clear the error window and it takes off again, but mean time I have lost data all the time it was on. What could I be doing to cause this error? Is this a condition caused by improper settings? What am I doing wrong?
--- In SpectrumLabUsers@yahoogroups.com, "compu_friend" <compufriend3@...> wrote:
> I took your advice on the single conversion method. I built a new preamp and things worked much better with a single conversion.
> Here is a link to my first results and experiments. Spectrum Lab is doing a great job for me.. Much appreciated!
> --- In SpectrumLabUsers@yahoogroups.com, wolf_dl4yhf <dl4yhf@> wrote:
> > Hi Gerry,
> > Difficult to tell if we really need dual conversion here. From a gut
> > feeling I'd day no, and instead simply let the FFT-based multi-notch
> > filter remove the 50 or 60 Hz and other unwanted signals. For example in
> > Europe, there is a huge amount of 16 2/3 Hz from the electric train
> > system, which must also be removed by an automatic notch which must be
> > as narrow as possible. Each frequency conversion (by a multiplier in the
> > time domain) may produce unwanted products, thus the less conversion
> > steps the better. Of course this depends on the frontend - it there is
> > nothing which can be aliased / mirrored it's no concern. Even the
> > upconversion by ~11 kHz could be done via the FFT-based filter, after
> > all 'unwanted' signals have been eliminated.
> > All the best,
> > Wolf .
> > Am 15.04.2013 02:18, schrieb compu_friend:
> > >
> > > Hi Wolf,
> > >
> > > I am starting a new project using Spectrum Lab. The idea is to use SL
> > > as a receiver and 60 Hz rejection tool. I have this designed in the
> > > first testing of a long range lightning radar system. This uses Frank
> > > Kooiman's LR program for plotting the strikes on the map.
> > >
> > > Im using the excellent work done by Renato and yourself for the front
> > > end of this system. I have that running but need a few more turns on
> > > the antenna. What I would like to ask you to do is take a quick look
> > > at what Im doing with SL. Then see if it has any glaring hang ups
> > > before I get moving with this project with other people. It seems to
> > > be working from all I can tell but I do get some flashing error lights
> > > on the components here and there.. Lightning has a very large dynamic
> > > range to say the least!
> > >
> > > Here is a link to a page I started on the project. I have no other
> > > links to this until I vet it out.
> > >
> > > http://lrsatx.com/schumann_dual_conversion_receiver_for_LR.htm
> > >
> > > Thanks in advance,
> > >
> > > Gerry Gore, WB5TXA
> > >
> > >