Downconversion and Filtering

Downconversion and FilteringThis video shows the progress made on Cocoa Radio since the last video. The spectrum that is visualized in the waterfall and graph is AFTER the downconversion mixer and FIR filter. As I move the red line (software tuning) around on the display, it changes the tuning of the downconverter, and you can see the spectrum change. Also, when I change the IF bandwidth, you can see the effects of the filtering. There’s still quite a bit of work to be done, but these results are encouraging. Source

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NT1K – RTLSDR W- RTL2832U and E4000 Tuner

NT1K - RTLSDR W- RTL2832U and E4000 TunerTesting out the EzCap EzTV668 that has the RTL2832 and the E4000 Tuner Chip. I think it’s much better that the FC0013 Tuner. However don’t take my word for it. For $20 you can’t complain either way at 00:40 you will hear a conversation on a local repeater (W1TOM 146.940), One of the stations is close by my QTH and with the 2Mhz sampling, you can see both the output of the repeater and the -600khz input from the operator. Source

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Ultra-cheap SDR: HF with RTL2832 and transverter

Ultra-cheap SDR: HF with RTL2832 and transverterwiki.spench.net | Twitter: @spenchdotnet twitter.com Do the same on Linux & Mac OS X: wiki.spench.net ultra-cheap-sdr Google Group: groups.google.com This is a simple demonstration showing how one can receive HF using the ultra-cheap RTL2832U-based DVB-T USB dongle and a transverter (to move the HF signals into the range that the tuner in the dongle can receive). Source

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SDR# and RTLSDR WFM Stereo

SDR# and RTLSDR WFM StereoThis is a preview of SDR#’s WFM in Stereo using the RTLSDR at 2.048Mhz. Watch my mouse click Stereo on and off. This is a pre-release of the software with Stereo FM. Source

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2m Amateur Ham Band with RTLSDR and SDR#

2m Amateur Ham Band with RTLSDR and SDR#The 2m ham band with the ezcap RTLSDR stick and SDR# ( SDRSharp ). First few minutes are a repeater, next some APRS digital, and then a beacon from K2DLL in Upstate, NY. Source

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SDR# FFT Smoothing With RTLSDR

SDR# FFT Smoothing With RTLSDRThis is just a test of the SDR# ( sdrsharp ) FFT Smoothing functions with the RTLSDR. Looks very nice and smooth. Source

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SDR# and RTLSDR WFM Stereo #2

SDR# and RTLSDR WFM Stereo #2This is the official release of WFM Stereo on SDR#. It has a stereo enhancement that provides better stereo separation and higher audio fidelity, I have tested this against WRPlus and SDR# is much better audio wise, and keeping a lock on Stereo. You can watch me clicking FM Stereo on and off, and on the top of the screen you can watch the (( stereo )) icon go on and off. Source

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