LabVIEW
How to monitor wireless signals in a room using LabView
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Ben wrote:
It would about that time that you should expect them to observe;
But how can he observe when he is in the chamber
?
Perhaps the $15K for the VNA would be better spent on therapy?
I thought OP is the therapist, trying to confront his client with physical facts.
An USRP can scan the entire spectrum up to x GHz (depending on the model). However, the bandwidth is limited so the spectrum has to he 'scanned'. I'd think a VNA does it the same way, but might be wrong.
Theoretically, a really bad sampling device would work. One that does not have an input filter. Normally, when you same 0-1MHZ, you'd filter so nothing else comes in. But if you filter (let's assume a perfect band pass filter) 0-2MHZ, and you sample it with 0-1MHz, the 1-2MHz will show as wrapped frequencies (1-0MHz). USRP's work like that, they filter from x to x + bandwidth, and sample with bandwidth. So if you don't filter at all, you will see signals from the entire spectrum, but with the limited bandwidth and without knowing what frequency the signal is. I'm no expert, but that should more or less how it works. I'm not sure if an USRP can be set up to not filter at all, or if other devices like that exist. An electrical engineer will probably be able to make this without any problems.
Search LabVIEW like a graph! 
wiebe@CARYA wrote:
Ben wrote:
It would about that time that you should expect them to observe;But how can he observe when he is in the chamber
...
Too easy.
Using LabVIEW you can not only Acquire and Analyze but you can also Present.
Save the sweep to file.
Ben
@Ben wrote:
wiebe@CARYA wrote:
Ben wrote:
It would about that time that you should expect them to observe;But how can he observe when he is in the chamber
...
Too easy.
Using LabVIEW you can not only Acquire and Analyze but you can also Present.
Save the sweep to file.
Surly a proper conspiratorialist won't fall for that.
wiebe@CARYA wrote:
@Ben wrote:
wiebe@CARYA wrote:
Ben wrote:
It would about that time that you should expect them to observe;But how can he observe when he is in the chamber
...
Too easy.
Using LabVIEW you can not only Acquire and Analyze but you can also Present.
Save the sweep to file.
Surly a proper conspiratorialist won't fall for that.
Yes, sadly even a 21-CFR-11 compliant application (admissable in a trial) may not be effective.
I have talked to psychotics in my past and found that as soon as I talked them into a corner, they changed the subject. Perhaps looking to LabVIEW and hardware may be a case of "everything looking like nail" when the proper tool is antipsychotic drugs.
But then again...
The RF chamber and VNA can be used to demonstrate how wrapping the cell phone in tin foil is effective shielding. In that case aluminum foil skivvies may be an acceptable option for the skeptical one.
Ben
