background preloader

A Software Defined Radio in C#

Related:  GNU_RadioSDRSDR - Software Defined Radio

SDR Touch Upconverter Comparison: Nooelec Ham it Up vs SDR Up 100 A few weeks ago Akos from the SDR for Mariners blog did a review of the SDR Up 100 Upconverter, and he promised to compare it with the Nooelec Ham-it-up Upconverter when it arrived. He has now done the comparison, and written about it on his blog. For each test he used a gain of 0dB and the same 20 foot random wire antenna. Update: Akos has now included comparisons with various RTL gain settings.

Interrupteurs domotique Blyss de castorama Hello ! J'ai finalement décidé d'utiliser un arduino en mode analyseur logique low cost avec la methode donnée par al1fch. J'ai ainsi pu comparer la différence entre une trame envoyée de la telco et une autre envoyée du spoofer. Résultat, seul le délais entre deux trames émise à la suite diffère. En modifiant la valeur de 4*H_TIME (=9,6ms), par les 23,8 ms observé sur les captures de la telco toutes mes prises (Home System / Liveez) réagissent cette fois-ci à tout les coups ! /* Envoi un bit de stop par RF */inline void send_footer(void) { SIG_LOW(); //delayMicroseconds(H_TIME*4); delay(23. A voir avec bidle si ça marche mieux avec ce correctif. D'autre part, concernant mes problèmes de porté de l'émetteur seeedstudio (pour rappel, j'avais du l'alimenter avec du 12V), j'ai suivi le conseil de barbudor : j'ai acheté les mêmes chez LedSeeIl faut mettre une antenne 17,3cm Maintenant, même avec le 5V de l'arduino mon émetteur fonctionne très bien. Merci pour votre coup de main !

New Linux/GNURadio users, read this before installing! : RTLSDR Beginner Antennas Antenna size depends on the frequency you want to hear: higher frequency (bigger number) - smaller antenna. You need an antenna that receives signals from all directions - called omnidirectional.Materials make no difference: any type of wire is good, as long as it keeps its shape. Metal coat hangers are popular, multi-stranded or solid makes no difference. I'm a fan of No 10 house grounding wire. You need to connect your antenna to your RTL stick: coax cable is needed, read my hardware guide for details. Recommended beginner antenna A monopole with two radials optimised for 120-130 MHz - three 60 cm (2 foot) elements in a peace sign / Mercedes emblem shape, coax conductor connected to vertical element, braid to two sloping elements. Why? A more aesthetically pleasing solution is using screw terminal blocks and wood - this also enables quick disconnecting of antenna elements. Put your antenna outside Telescopic antennas - about 10 dollars This should be your first ready-made antenna.

rtl-sdr – OsmoSDR DVB-T dongles based on the Realtek RTL2832U can be used as a cheap SDR, since the chip allows transferring the raw I/Q samples to the host, which is officially used for DAB/DAB+/FM demodulation. The possibility of this has been discovered by Eric Fry (History and Discovery of RTLSDR). Antti Palosaari has not been involved in development of rtl-sdr. Specifications¶ The RTL2832U outputs 8-bit I/Q-samples, and the highest theoretically possible sample-rate is 3.2 MS/s, however, the highest sample-rate without lost samples that has been tested so far is 2.56 MS/s. Supported Hardware¶ Note: Many devices with EEPROM have 0x2838 as PID and RTL2838 as product name, but in fact all of them have an RTL2832U inside.brRealtek never released a chip marked as RTL2838 so far.The following devices are known to work fine with RTLSDR software: People over at reddit are collecting a list of other devices that are compatible. This is the PCB of the ezcap-stick: More pictures can be found here. Software¶ Usage¶ .

RTL-SDR community on Reddit WebSDR at RAF Hack Green bladeRF - USB 3.0 Software Defined Radio by Nuand As wireless technologies become ubiquitous, Software Defined Radios (SDR) are gaining popularity. Unlike most radios transceivers found in phones, WiFi devices, remote controls, etc. that can only communicate using specific wireless modulation schemes, Software Defined Radios are completely software based, which allows them to communicate with devices across the RF spectrum. Besides interacting with existing wireless devices, SDRs allow for the development of new wireless systems and protocols using intuitive software tools and APIs. bladeRF is a platform designed to enable a community of hobbyists, and professionals to explore and experiment with the multidisciplinary facets of RF communication. A Software Defined Radio platform should not end at the hardware, which is why there is such a strong emphasis on documentation and tutorials. The bladeRF is a fully bus powered device that does not need to be plugged into an outlet for normal operation.