Архив за 08.05.2018

Off-Topic • Re: Are websdrs, spyservers etc… legal?

"Every person commits an offence against this Act who receives a radiocommunication......"

So basically using an RTL SDR for any purpose other than listening to Public Radio broadcasts is Illegal. :shock: :o

No listening to HAM, downloading Satellite images, listening to aircraft communication or plotting aircrafts on a map....all illegal.

Statistics: Posted by illllm — Tue May 08, 2018 11:29 pm

Military Freq. Beeping?

Do you think this is some type of morse code?


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Comment on SDRSharp Users Guide by Brightnoise

Yes, your explanation is correct. For my measurements I need to have C/N in a specified bandwidth. The noise floor in the reading (not the S-meter reading, but the number on the right-hand side of the spectrum) is related to the noise in the FFT bandwidth (one bin). This bandwidth is not specified: I need to recalculate it from the FFT-settings.When I change the resolution, the reading changes corresponding. As it should. There is always the need to calculate the BIN bandwidth. Or do I oversee something simple….. My measurements are always related to radio bandwidth 3 kHz; I set the filter to that bandwidth and take the reading from the level indicator (left-hand pane). Better suggestions? Please!

Comment on SDRSharp Users Guide by Brightnoise

Thank you! I see that the noise floor WITHIN the filter is estimated/measured as reference; even when the carrier has sidebands. I still see some things that I can’t understand; I will look further in it.

https://www.rtl-sdr.com/building-a-passive-radar-system-with-an-rtl-sdr/ https://hackaday.com/2015/06/05/building-your-o…

IvanK_2015 пишет:
https://www.rtl-sdr.com/building-a-passive-radar-system-with-an-rtl-sdr/ https://hackaday.com/2015/06/05/building-your-own-sdr-based-passive-radar-on-a-shoestring/ Именно это и есть фейки. С какой ц...
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Comment on SDRSharp Users Guide by Bertran

The level of the signal inside the highlighted IF in relation to the noise floor in dB.

Comment on SDRSharp Users Guide by Brightnoise

All is very well explained. Thanks. One question: what is the meaning of the number on the right-hand side of the spectrum display. In the figure “pager causes noise floor rises” above it is visible and gives value 3. In my application it is changing the value continuously and I can’t get a logic explanation what it is measuring. Anybody?

Comment on Getting the RTL-SDR to work in Windows 10 by Jon Kreski

I fixed it. Followed Step 5 – above. Ran the install batch file. That downloaded the required driver files. Then I went back into Zadig (ran as Administrator) and did the re-install driver process. Started SDR# and SDR-Console – both worked like a charm. Great pieces of free software. Thanks to whomever put all the effort into those gems!

Comment on Reading Household Wireless Utility Meters with an RTL-SDR and Plotting the Data in Home Automation Software by Matthew Newman

I’ve been collecting data from my water and power meters using two instances of rtl-amr fed into an InfluxDB stack. That makes for easy dashboard creation and rearrangement. Data is sourced in JSON and a python script dumps it to Influx. Based off of this page.

вот тот же диполь на балконе первого этажа…

вот тот же диполь на балконе первого этажа
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