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Using DVB-T sticks as Wideband SDR Receivers Phil Crump M0DNY.

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Presentation on theme: "Using DVB-T sticks as Wideband SDR Receivers Phil Crump M0DNY."— Presentation transcript:

1 Using DVB-T sticks as Wideband SDR Receivers Phil Crump M0DNY

2 Architecture I smell very cheap poor man's software radio here :) – Antti Palosaari

3 E4000 Tuner MHz Gap at MHz Tunable CMOS Bandpass filter Zero-IF I/Q output

4 RTL2832 ADC DVB-T Demodulator Also contains 8-bit ADC at up to 3.2Msps – Designed for WFM, DAB. Est. 48dB Dynamic Range

5 Vs Funcube Dongle Funcube Dongle Pro RTL-SDR TV Dongle

6 Vs Funcube Dongle (Specs) FCD ProFCD Pro +RTL-SDR (E4000) Bandwidth~80KHz192KHz3.2 MHz ADC Resolution16 bits (~14 actual)24 bits (~20 actual)8 bits (~7 actual) Dynamic Range~90dB~120dB~42dB XTAL Accuracy~50ppm0.5ppm TCXO~200ppm Cost£100£125~£20

7 Potential Uses Anything the FCD can do – WFM, NFM, SSB, TETRA,... Wider Bandwidth stuff – ADS-B, GSM, LTE, GPS,... Yes, even GPS!

8 Software Windows – Zadig for drivers – SDR # (SDR Sharp) Linux – GNU Radio gqrx – QT Radio

9 Demo Time to see how good a Faraday cage this place is..

10 VHF NFD (2m SSB Band)

11 E4000 Frontend Filter

12 Add-ons HF Upconverters – Push HF up to ~100MHz LNAs – With bandpass Filters

13 Useful Tips ESD Diode often not installed. – BAV99 is a suitable replacement. Crystal Temperature – Keep it out of the wind! USB Extension cable

14 Availability eBay: ~£20 Alternative Tuner Chips: – FC0012/FC0013 – FC2580 Beware scam sites.

15 More Information ##rtlsdr on irc.freenode.netirc.freenode.net Slides and references will be available at: https://www.thecraag.com/RTL-SDR https://www.thecraag.com/RTL-SDR

16 Questions?


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