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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RTL-SDR TV tuner dongle on 10 Ghz

RTL-SDR TV tuner dongle on 10 Ghz$20 TV tuner as an IF receiver for my 10 GHz transverter. Two beacons are received, one on Frazier Mountain and the other from Palos Verdes. My station is in Redondo Beach with a clear view to the n Source

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Testy taniego odbiornika SDR

Testy taniego odbiornika SDRTest taniego odbiornika SDR opartego o RTL2832U Model LV5TDLX DVB-T USB Source

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Noxon DAB Stick SDR (osmocom rtl-sdr) RTL2832U

Noxon DAB Stick SDR (osmocom rtl-sdr) RTL2832UFirst attempts on trying the Noxon DAB Stick at 144.800 MHz APRS with the delivered Antenna (indoors). See more here: sdr.osmocom.org This Stick was designed for listening to DAB only. Under Ubuntu it works for DVB-T and as a SDR with a Bandwidth up to 3.2 MHz. Tuning range could be from 64-1700 MHz (not tested with this NOXON Stick) 73 Oliver DL6KBG 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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Decoding P25 with SDR#, DSD, and RTLSDR

Decoding P25 with SDR#, DSD, and RTLSDRThis is decoding P25 with DSD and SDR#. It isn’t the greatest, but I guess it’s a work in progress. You need a very strong signal, and just the correct audio levels and settings. Most of the video is P25 bits and pieces. My audio is not clipping, it’s simply a problem I cannot figure out with stereo mix. Source

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