Measuring Filters With RTL-SDR and Noise Source. Spektrum SDR Spectrum Analyzer

Spektrum: github.com/pav...
PlutoSDR SpecAnn: • Spectrum Analyzer and ...
Noise
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[@SignalsEverywhere]

Added video chapters, I'll try to make this a habit.

[@DoubleALabs]

Nice video, Sarah! I just put one together where I used Spektrum to compare some OTA antenna setups.

[@SignalsEverywhere]

That's awesome, I actually watched that video after the RTL-SDR blog wrote an article on it. I love your videos showing the AF spectrum of various digital audio formats. I love taking difficult concepts and showing them in visual ways that are easy to understand. You hit the nail on the head with those!

[@Davis38]

Thank you so much for this video! You opened up a world to me thanks to this software.

[@SignalsEverywhere]

Glad you found it useful, thanks for watching!

[@DAVIDGREGORYKERR]

The BIN size is associated with the FFT but 2000 Bins does not relate to any power of two that would be used by a Fast Fourier Transform which should 1,2,4,8,16,32,64.........

[@phoneticau]

Any good suggestions for noise generator with at least 40-60dB of noise above RX floor need a lot of headroom to start tuning gross mistuned filters, question can I feed RTL-SDR with say -10dBm noise assuming 8 bit = 48dB dynamic range should be able to tune anything gross mistuned ??

[@patrolman53]

Wow this is cool, my university is currently working on a Pico-Satellite project we are just getting started. I have a HackRF and I was wondering if this will be enough for most satellite related measurements? Thanks for your time!
Jason

[@SignalsEverywhere]

Really depends on what all you need to do. The frequency range of the HackRF is pretty good though, issue is that it doesn't have the best front end and you can only do half-duplex. Meaning RX/TX must be done one at a time, you can't do both simultaneously.

[@TimCarterPhotos]

You may want to have a look at the SatNOGs and TinyGS projects. Both are open source, community driven, low cost ground stations. They have tons of great info on RF hardware, antennas, receive software, etc.

[@jameswest3275]

any fix to make this work with a notebook with a 4k video card and a 4k display? Font size impossible to read. Keep up the good work with your videos.

[@SignalsEverywhere]

The only thing I can think of is using compatibility mode to switch the display resolution at run-time. I'm not aware of this application having any visual adjustments for larger displays.

[@perttisalonen850]

Hi! Can one use the noise source of Ham-it-up up/down converter in stead of such kind of noise source that you are using?

[@SignalsEverywhere]

Absolutely! The Ham It Up Noise Source (if populated) will work just the same as the one pictured in the video.

[@phoneticau]

Thans Sarah for this video, tried the SW very impressed how fast sweep 25 to 1700Mhz for my RTL stick, any suggestions for using SDR-Play box, SDR-Play application is very slow and I think it uses full I-Q processing, looks like this application just samples 8 bit data magnitude and not worry anout phase ??

[@SignalsEverywhere]

There is an application that's supported for the SDRPlay hardware, I haven't had the best luck with it but may try it again in the near future. www.sdrplay.com/spectrum-analyser/