Архив за 16.02.2018

Комментарий к записи RTL_SDR: краткое руководство (перевод) (elektron)

Спасибо. На win64 помогла версия SDRSharp v.1361

after several months of frustration, I finaly got my RTL device to work. So onto the next project,…

after several months of frustration, I finaly got my RTL device to work. So onto the next project, anyone here using it for ADSB? I have RTL1090 downloaded and it works but I am not seeing the mapping as I once did. I understand there has been some changes in software but I have been away from it too long to know all of whats up just yet. So does anyone have a good program for windows that will allow me to see the map with aircraft layered on it in flight?

(RSS generated with FetchRss)

Comment on RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source by jappl3

What you have is probably a 4-way non-terminated coupler, whereas the 3-way coupler in this tutorial is basically the same, but internally terminated with 50 Ohm load on 4th port. What you should do is to terminate the 4th port with 50 Ohm resistor according to the picture in upper reply.

Comment on RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source by jappl3

Just google before posting next time, ok?
https://imgur.com/OBGqvG7

Comment on SDRTrunk Setup and Use Tutorial by enCrypt

Nice, does this follow MPT1327 Analogue trunking?

RTL-SDR Discussion • Re: Raw digital output from usb dongle

PLL settling time in good designs is ten times the period duration of the reference frequency. (Frequency error smaller than 1 % of initial frequency step, within one octave).

In the RTL front-end chip the VCO is running in the GHz range, with a max/min frequency ratio for that VCO of preferably slightly over two, and the wanted mixing oscillator signal is obtained at the output of a divider chain. This divider allows the generation of complex LO-signal AND the generation of LO-signal with low (odd) harmonic content by using waveform synthesis. The even harmonics are by nature suppressed (50 % duty cycle).

The loop filter for the PLL is on-chip; the reference frequency is probably 28.8 MHz or 14.4 MHz; settling in one microsecond is thus probable.

The calculation of the PLL-division number and the calculation of the LO-divider numbers and wave synthesis factors (---> these factors are probably already fixed-values in the hardware) takes some time.
(In early days there was a separate microprocessor, controlling a separate PLL).

Statistics: Posted by Brightnoise — Fri Feb 16, 2018 5:32 pm


Comment on More Reviews and Discussion on the Airspy HF+ by Andy

A detailed review from Switzerland (including audio comparisons between Airspy HF+ and Winradio G33DDC Excalibur Pro):
https://www.fenu-radio.ch/Airspy_HF-Plus-en.htm

Скиньте пожалуйста не знаю где скачать крякнутую версию SDR Touch для андроида и какую версию качать не ругаите строго…

Скиньте пожалуйста не знаю где скачать крякнутую версию SDR Touch для андроида и какую версию качать не ругаите строго

Comment on RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source by Rick

How to connect the ebay swr bridge for useing this ? it has 4 ports in stead of 3. any info on that ?

Сейчас у меня возникла другая идея. Не снифферить обмен, а прямо сразу начать писать прошивку девайса, читающего и пишущ…

killer258 пишет:
Сейчас у меня возникла другая идея. Не снифферить обмен, а прямо сразу начать писать прошивку девайса, читающего и пишущего этот чип. А потом действовать следующим образом- запустить HDSDR, выставить...
читать полностью...
Широкополосный приёмник из DVB донгла - Страница #541

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