Sdr and rtl2838

frankviana

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My Satellite Setup
Satellites/tv
My Location
Brazil
Today I did some tests using my ISDB-T card and SDR software.

I'm new and need to find some kind of frequencies working here... First, I found 90.7 MHZ WFM...

I need to discovery what can I do with a lot of signals here.

Some screenshots:

SDR 1.png

RTL2838.png

WhatsApp Image 2020-06-02 at 21.50.54.jpeg

WhatsApp Image 2020-06-02 at 22.11.21.jpeg

WhatsApp Image 2020-06-02 at 22.24.08.jpeg

This is a ISDB-T signal (below) working my Samsung TV, 605 MHZ

WhatsApp Image 2020-06-02 at 22.25.51.jpeg

WhatsApp Image 2020-06-02 at 22.30.36.jpeg

WhatsApp Image 2020-06-02 at 23.41.45.jpeg

Below, I think is for same my phone mobile data frequency.

WhatsApp Image 2020-06-02 at 23.50.59.jpeg

WhatsApp Image 2020-06-03 at 00.09.55.jpeg

Some informations about this kind of receiver and where work here, South America.

 

frankviana

Member
Joined
Jan 10, 2006
Messages
179
Reaction score
152
Points
43
Age
42
My Satellite Setup
Satellites/tv
My Location
Brazil
From March, 2016

rtl-sdr.com

In most parts of the world the DVB-T standard is used to air digital HDTV. In the USA the ATSC standard is used, and in China DTMB is used instead. In other countries such as Brazil, Peru, Argentina, Chile, Honduras, Venezuela, Ecuador, Costa Rica, Paraguay, Philippines, Bolivia, Nicaragua and Uruguay a third standard called “ISDB-T International” is used which is based on the Japanese ISDB-T standard.

digital_broadcast.png

Recently a team from Uruguay has been working on creating a ISDB-T receiver in GNU Radio. With this decoder ISDB-T signals can be received with a wide bandwidth SDR (needs to be 6MHz or larger) and then decoded into a video file. Because ISDB-T is so similar to DVB-T they have based much of their code on gr-dvbt which is a GNU Radio based DVB-T decoder.


In addition to the ISDB-T decoder, they have also implemented a 1-seg decoder. 1-seg is a mobile HDTV service that exists in Japan, Argentina, Brazil, Chile, Uruguay and Peru. It runs on the ISDB-T system, and is called “1-seg” because it’s data occupies 1-segment of the 13-segment based ISDB-T bandwidth. It is used in small mobile TV receivers, many of which are now built directly into mobile phones sold in countries that use ISDB-T. Due to it’s much lower bandwidth requirement the 1-seg decoder can be used with an RTL-SDR dongle, and has already been tested to work.
 
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