RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector

But this would be only listening to the frequencies on which satellite transponders transmit, unless it is possible to somehow circumvent these limitations of the bands supported by the converters.

Hello colleagues, I was very interested in the topic and I am already looking to buy such a usb dongle. However, I wanted to ask if anyone tried to play with such usb tuners to receive TV from the satellite? You can find several models on the net and they are not much more expensive than SDR DVB-T. If it was possible to replace drivers in a similar way, the range of received frequencies could be significantly increased. Thanks for the hints and successful hunting in the air.

You will not extend it too much because the SAT tuner receives (intermediate frequency, i.e. the head input) from 950Mhz to e.g. 1750Mhz - possibly up to 2150Mhz - of course without a converter, and a DVB-T tuner from say 24MHz to about 1750Mhz so there is no sense.
It was possible in the past (or maybe still - I have not been on the topic for several years) to use tuners with appropriate systems to capture data packets from satellite transponders used as Downlink for the Internet via satellite. So it was possible to preview what users of such internet were downloading or watching. The tuner that had the right layout include SkyStar 2 and the capture program is e.g. SkyNet or SkyGrabber.

Come on, today I tried DAB + reception on RTL SDR with the software from the website
http://www.ukwtv.de/cms/downloads-aside/281-dab-player-von-andreas-gsinn.html, there is for RTL, only need to add two files, msvcp120.dll size 455328 and the file msvcr120.dll 970912 kB, and from the software you need: treiber2 for RTL. The software is also Polish. I pick up DAB + from Katowice - 8 stations.
There is a problem when I do DAB installations, so there is no SDR, tie drivers are not compatible.
Does anyone know how to do it, so that I have them on one computer like DAB and SDR?
Jard

Hello, have any of you tried to run such a receiver on windows 8.1 x64?
I found only the right service in the most popular usb dongle ID 0BDA 2838, unfortunately on a laptop with the above-mentioned system, despite a few days of struggle, nothing wants to work. I checked xp x86 and win7 x86 radio and it whirs beautifully.
I tried various "original" drivers, DVBT receiver programs only scan the band without receiving any signal, the system can install the driver as realtek 2838 !, or keyboard driver, game driver, other usb device ... etc.
The same happens after replacing the drivers in the Zadig program, no WCID verification. SDRsharp "does not see the cards or drivers are installed incorrectly".
Maybe someone knows how to solve it, otherwise I will have to sit at a large pc to listen to the radio and it was supposed to be so nice Regards and thanks for your help.

For me it works without problems on Windows 8.1 pro 64 bit.
Before installing Zadiag drivers, you should disable checking digital signatures of drivers.

http://spece.it/windows-serwer-artykuly/jak-z...-sterownica-bez-podpisu-cyfrowego-w-windows-8

Zadig for Windows Vista and newer:
http://zadig.akeo.ie/downloads/zadig_2.1.0.exe
or
Automatic SDR Sharp installation package (install.bat) along with Zadig (in the sdrsharp folder after downloading the files).

http://sdrsharp.com/downloads/sdr-install.zip

Hello, thanks a lot buddy SP8GAPI for help. I did as you described and it worked! The error was that I had SDRSharp version 1.0.0.922 installed (previous failed attempts) and the one you recommended in the link is 1.0.0.1317 Radyjko played on the first try. Now I am starting to assemble some "tourist", broadband antenna. Greetings

As already the sdr technique, I recommend extending it with flight controls, flight radar on the 1090MHz frequency, too many Malaysian airlines have recently been lost from the MH370 radar screens, or MH17 is redirected.

http://www.pennula.de/spezialthema-flugzeug-r...-b-decoder-air-flugfunk-sdr-radio-rtl-usb.htm

or agencies and work frequencies

http://www.funkfrequenzen01.de/index015.htm

devices, converters, radio frequency converters, the rest belongs to the mathematicians of the enigma and their successors.

http://www.ebay.de/itm/201087638543?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

http://maniana.strefa.pl/

http://rtl-sdr.sceners.org/?tag=upconverter-2

Q: What to do when we damage the tuner chip (e5k / Fc0012 / Fc0013) in our donglu in a way not explained to us?
A: First, calm down and remove the thoughts of committing Harakiri . Secondly, he should not be written off because, it may turn out that he will have a second youth ... While the RTL system is still alive, there is a good chance that after extracting the rotten system, we will be able to revive it in a new band.

After my friend gave me a damaged tuner after the last storm, I thought about trying to get something more out of him. That's how I found this one Link ... the rest was easy :D

That's all talk, let's move on to the action (people with weaker nerves should better look at photos with one eye) :)



After cutting out the redundant system (note the board turned out to be multi-layer), all that was left was to insert the transformer into the input, connect the antenna and grounding. Balun wound on a toroidal core from a LAN transformer. In my case, with 5 coils, the RTL heats up terribly, so I redirected it to 10, which limited its overheating.
In conjunction with the DWZO antenna with a length of about 18m, a smile appeared on my face. A few more samples of what is heard, and a lot of listening compared to a healthy dongle.

Nice and useful. I just have a question regarding this system overheating ... He seems to be heating like hell by nature.

Do a little test. Measure the tension on the RTL legs without a hit, between themselves and between them and ground. This will give you an idea of whether you sometimes short-circuit DC or something like that (I don't think anyone checked it). In addition, you could be tempted to measure the RTL input impedance and choose a transformer to transform the 50Ohm seen from the antenna to the input impedance of the cube.

I think the sensitivity could be significantly increased (it depends on how far we are in the forest now).

Nom and now I killed the nail ... As these are ADC inputs, I expected not to see any voltages and here it is about + -20mV between the positive and negative inputs but only when touching the input. Near the gauge itself, the needle didn't even move. And between the inputs and the ground of the system I have about 55-59mV when touching the input, the voltage rises slightly. The meter is LAVO3 in the 150mV range and 20K internal resistance.

To take the measurement correctly. Take resistors an order smaller than the impedance of the meter you are using. Then you can be sure that you, as the antenna, do not let in some "crap" that causes this voltage.


As can be seen in the original circuit, the coupling is purely capacitive, which suggests that the RTL circuit has an internal circuit biasing this input.


I suggest that you make a tap in the middle of the secondary winding and ground it, and connect the remaining ends of the winding through original capacitors to the RTL inputs.

Then you can combine with impedance. The impedance will approximately be the transformer ratio multiplied by the load impedance.

It means. If you have a transformer of 10 turns and a secondary transformer of 2 x 5 turns, then by plugging in a 50R resistor between the extreme pins of the secondary winding you will keep 50R on the antenna side. If, however, you have 10 turns and 2 x 10 turns, i.e. 1: 2, the load on the secondary side should be around 100R.

This matching should result in less noise and garbage and a better signal. Here you can also experiment with the gearbox, because the bigger the signal, the stronger the converter will get.


A mismatched transformer will act as a coil. I will describe it with an example. We have a transformer with two windings of 100uH. This value will be shown by the meter, while when we short the second winding, this value will go to a few hundred nH in the worst case to several uH, which is why the match is so important.

Umm I don't understand . I did not use any long test leads as far as it goes. There was up to 3 cm of wire between the terminals of the meter and the RTL inputs. These 20mV appear only when I touch the RTL inputs with my finger. There is no voltage between the inputs (I +) and (I-). The opposite is true when measuring to GND. It is also about 55mV without touching. When touched with a finger, this value increases to almost 60mV. This way the balun is wound in a tri-fold shape with 10 coils after the primary one is 10 and the secondary one is 20. So I tried to connect the mass to the secondary center, but it did not work very well. It is worth having a look at the E4k and R820 datasheet accesses, there are output impedance values there.

Interesting fact: it turns out that the owners of tuners with the R820 / R828 system can, without reducing the capabilities of their dongle, expand its band with KF. Why? Well, because the R82x have a single intermediate output usually connected to the 1st and 2nd RTL leg. And the second transducer (pins 4 and 5) is not used. I suppose in that case it would be enough to give a (Q +) (Q-) input balun and after switching to Direct Sampling Q it would be KF. And if you changed the settings again, it would be the old way again.

Everything is great and how to switch it in the program? There is total silence in SDR # after changing the settings from Quadrature sampling to direct sampling.

Maybe someone tested the following diagram with the SA612 chip?



According to the datasheet data, there are no special differences - is it the same in practice?

best regards

Hello.

Maro220 wrote:

According to the datasheet data, there are no special differences - is it the same in practice?

Paper will accept anything .... :!:

Consider the simple dependency of change after which you have no frequency limitation and where we can predict that:
f / het / - f / receive / =? / mixed / (output)
f / het / + f / receive / = ?? / mixed / (output)
(the word "SLR" is helpful)

f / het / - 125MHz heterodyne
f / received / is RX


Best regards.

I have a "different" question. Is there a chance to use such a tuner as a (simple) spectrum analyzer in your home lab?

---

Something can be found, I think I will have to try it myself:

http://majek.mamy.to/pl/rtlsdr-analyzer-from-dvb-t-tuner/

I have trouble configuring this tuner.
Maybe someone will tell me where I am making a mistake?

I expected such a window:
http://imageshack.us/a/img716/292/002dk.png " target="_blank" rel="nofollow noopener ugc" class="postlink inline" title="" > http://imageshack.us/a/img716/292/002dk.png

and here I am popping up:
https://obrazki.elektroda.pl/9753336000_1410825920.jpg " target="_blank" class="postlink inline" title="" > https://obrazki.elektroda.pl/9753336000_1410825920.jpg

Playback in name and in real life, because from a microphone connected to the sound card
you hear multiple echoes of local sounds.

My system is Win XP and the sdr program I use is HDSDR.

Zadig for Windows XP:
http://zadig.akeo.ie/downloads/zadig_xp_2.1.0.exe

Automatic SDR Sharp installation package (install.bat) along with Zadig (in the sdrsharp folder after downloading the files).

http://sdrsharp.com/downloads/sdr-install.zip

Please install this soft SDR Sharp and Zadig drivers.

I have put the program and libraries for HDSDR here (just read the topic carefully)

https://www.elektroda.pl/rtvforum/topic2353101-180.html#13533562

The necessary ExtIO_RTL.dll library is in the specified HDSDR installer

https://www.elektroda.pl/rtvforum/download.php?id=585820

I have posted the descriptions of Zadig's installation and software here:

https://www.elektroda.pl/rtvforum/topic2353101-90.html#13168529

sb8gapi wrote:

Zadig for Windows XP:
http://zadig.akeo.ie/downloads/zadig_xp_2.1.0.exe

Automatic SDR Sharp installation package (install.bat) along with Zadig (in the sdrsharp folder after downloading the files).

http://sdrsharp.com/downloads/sdr-install.zip

Please install this soft SDR Sharp and Zadig drivers.

Despite the help, I failed.
SDR Sharp is quickly disappearing on my computer, and with HDSDR I haven't made it a hair a bit.

I can see the message: "ExtIO DLL not active".
Any advice on that?

Somewhere at the beginning of this topic is a whole working package. You don't have to do anything about it.


It is on the other side of this thread.

Please enter some tuner model.

After correct installation, Zadig - HD SDR and DRS # should work without any additional settings.

sb8gapi wrote:

Please enter some tuner model.

After correct installation, Zadig - HD SDR and DRS # should work without any additional settings.

Model? that's good!
I bought it on a well-known auction site as:
"DVB-T DAB + USB tuner RTL2832U R820T SDR ADS-B".

"sensational DVB-T + DAB + FM tuner with RTL2832U chipset in R820T system"

There was also an inscription: "Store No: 320770"

Picture from a similar auction:
https://obrazki.elektroda.pl/9648288200_1363982205.jpg " target="_blank" class="postlink inline" title="" > https://obrazki.elektroda.pl/9648288200_1363982205.jpg

There was no plastic packaging visible in the parcel, but only an ordinary plastic bag
(as a replacement packaging), without any inscriptions.
That is why I cannot clearly state the type of this device, but I will call the seller tomorrow.

If you have a CD in the set, install the drivers and DVB-T receiving program and check if it works.

The model of this tuner is SPC-0155 and comes with RTL2832U + R820T

lysy1980 wrote:

If you have a CD in the set, install the drivers and DVB-T receiving program and check if it works.

The model of this tuner is SPC-0155 and comes with RTL2832U + R820T

Fortunately, I have a CD, I installed DVB-T at the very beginning of my attempts, but probably
because of the weak signal from the magnetic antenna i didn't find any signal and disheartened
this I went back to the SDR option.
Of course, before that, I removed unnecessary drivers from the command line.

For the test, I will try the DVB-T installation again to see if the systems are OK.
I'll get the signal from the roof antenna.

If it is not receiving DVB-T due to poor reception, check FM reception. You probably have a Blaze HDTV set, select FM as the source and look for a local station.

I would like to remind you that the USB port must be a minimum of 2.0 and a minimum processor 1.2 GHz and turn off any unnecessary programs
And on this antenna, you can catch the VHF radio with great problems and the services if they are in the vicinity of a kilometer, and planes if they are in sight.
At the beginning, cut off this antenna because it will not do anything, and on the cable from this antenna, install a female TV plug and connect an ordinary broadband TV antenna with a balun and you will surely catch something.

I'm still struggling to install SDR Sharp.

Modified the INSTALL.BAT batch file by removing the first commands:

Quote:

@Echo. off

tasklist / FI "IMAGENAME eq SDRSharp.exe" 2> NUL | find / I / N "SDRSharp.exe"> NUL
if% errorlevel% equ 1 goto start

echo:
echo Close SDRSharp Before Upgrading!
echo:
goto end

and the installation started.

Here is the possible reason for the program not installing earlier.
What should I change so that the unmodified BAT file also runs the installation process?

Hello.
Is an SDR receiver with a very wide band (e.g. RTL2832U + R820T) able to fully replace a radio scanner like Yaesu?
Of course, let's skip the mobility and possibilities of the antenna used.
Best regards.