Relative to what? If you'll remember, the Schumann resonance has several different nodes each having a difference in phase from one another. If I remember...
I guess that didn't really answer your question. By definition, the Schumann resonance is not a highly coherent signal which means its phase is not highly...
Actually both your answers make sense John. I only asked as I noticed if I set the Auto-Tune and let the Lock-In optimize things including phase that phase...
OK Brian. I would think if the lock-in is making a large phase jump, it is jumping between nodes. If it is making a small jump, it is just adjusting to a...
I agree John and I only need the chance to setup the tracking filter. If you take a look at the recently uploaded 19:30utc chart it is easy to see the traces...
Good. I really think in an area with a lot of cultural noise a coil is the best bet. Also, it will not mind the wind as much. John ... in ... noise ... means...
Now I am going to start this post with "My God". Unbelievable! After returning home from work I opened the SD131-S Tracking Filter manual and had a thorough...
Sorry but I have to shut this system down for as long as these storms last. The wind is very high and the lightning too close for my liking. This system has...
Brian, do you know the theory behind that tracking filter. Is it some kind of early phase-locked loop? When I think tracking filter, I automatically assume...
Brian, do you know the theory behind that tracking filter. Is it some kind of early phase-locked loop? When I think tracking filter, I automatically assume...
Anyone, I have asked this before with no response so again I am asking for info on the tracking filter circuit submitted by "I.south47". The circuit shows the...
Sorry I have been off line for a bit. So I do not make a mistake John let me grab the manual so I can relate the workings of this thing. I re-started...
Without writing ten pages out of the manual John this thing amplifies the incoming signal, runs it through a phase amplifier and at the same time runs the...
The first chart will upload in one hour as the 240 sample rate produces a chart every hour. The radar looks quiet with lightning out over New Mexico now but...
Understood and thanks. Looks to be quite a nice piece of equipment. Very nice indeed. John ... frequency ... internal ... is ... of ... the ... sense. ... ...
I should add the reference frequency is also cancelled out down the chain via out of phase cancellation. The first chart will be messed up a bit as I am still...
I think ideally any other filtering should precede the tracking filter not follow it. John ... a ... a ... The ... remaining ... receiver. ... phase ... he ......
You could be right John. Take a look at the charts as they upload through the night and see what you think. The manual says not all of the signal of interest...
I am basing my opinion on the original Schumann Resonance Mode Tracker, which is basically just a tracking filter and was positioned last after the amplifiers...
The first chart is up and is labeled 0330utc. That is wrong and it should be 0400. Alpha does that once in awhile. I am only feeding a few millivolts into the...
Excellent, absolutely excellent. John ... upload ... all ... choice ... charts ... is ... tracking ... be ... to ... Gain ... pollution ... this ... and ... ...
Duh .... Adding gain did not make much of a difference and I remembered the tracking filter maintains signal amplitude and phase so how hard you drive it is...
Forgot to say I can take this thing out of Auto bandwidth control and set the bandwidth manually. Might play with that also. This SD131 cover 5Hz. to 20Hz. and...
I shut the system down for the day as the tracking filter generates a bit of heat. It is sitting on top of the Lock-In so I need to get these things in a rack...
Yes, the VCO out is the output of the tracking filter. The REF out is mainly used to decrease the lock range of the PLL without changing the free running...
Is this what you are using it for? This was found by googling tracking filter: http://www.eie.polyu.edu.hk/~enkgeza/eie579/papers/eie579pll_theory.pd f Looks...
John, what kind of loop are you using. What type of amplifying system are you using. Are you using a locked on amplifier? It understand a short circuited...
