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

As far as I am not mistaken, it is only possible that under one USB port it would work as RTL SDR, and under the other as an "ordinary" DVB-T tuner.
http://m3ghe.blogspot.com/p/installing-rtl-dongle-sdr-driver-using.html

Quote:

Note that if you insert the dongle into a different USB port you may have to use Zadig again. It seems that you can change which driver is loaded depending on the USB port used. Sat you could use one USB port for RTLSDR and another port for using the dongle to watch DVB-T with the supplied Windows application.

But I haven't tried it myself, so I'm not 100% sure if it works.

@bogi This will likely work as long as $ VID and $ PID are not identical.

@ lysy1980 what to do next?

http://www.rtl-sdr.com/tag/zadig/

On the scrin from the device manager, you had the driver installed not for this part of the dongle (Interface 1 is an IR port, probably) so no wonder that it does not work, you should choose Interface 0 .

Earlier, I tried to put the driver under both ports and it did not work. It got a mess and I threw everything away as it was. From the beginning they will start with SDR sharp, maybe it will be easier to install.
So what do I do first? Install SDR or DVB-T program right away?

Hello, I don't know if the department is good, if not, please move to the appropriate one.

I have a DVB-T + FM + DAB 820T2 & SDR dongle (blue)

I try to run it on SDR Sharp, but when I turn on the start in the program, the computer crashes, jerks with my voice, tears off the mouse, and the monitor turns off every now and then, and the message the display driver has stopped working.
Something's biting, I care about Sharp's show
Everything works fine on HDSDR, but I don't like this program
What to do?

Hello. Well, there are many topics on the electrode about TV tuners from sdr, but everything is mixed up. I would like to gather all the information on this topic. So write to you.
Here are my questions:
1) what are the sdr capabilities? Can I listen to cell phones? I heard you can get satellite photos.
2) what are some interesting sdr programs?
3) what is the best tuner?
4) which antenna would be the best?
5) Could an amplifier be needed for the antenna?
6) what is the range of the antenna? [/ Img]

1. I have doubts whether it is possible to listen in on the GSM signal.
2 and 3 I don't know
4,5,6. In terms of transmitting sdr waves, it does not differ from ordinary conventional radio. Different types of antennas are used depending on the desired effect. It cannot be said that one type of antennas is unambiguously the best. It all depends on what you want to achieve. Antenna range depends on many factors: transmitter power, antenna type, wave propagation, bandwidth and many other factors, so it is quite difficult to determine.

But I have a question what can I pick up? Because as far as I know it's satellite photos, listen to the taxi or the police, listen to the radio, etc. Are there any other functions? What programs will be useful to me?

Take a look at this page, here you have programs for the tuner, and on the second link you have described signals, frequency, spectrum and their audio.

http://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/

http://www.sigidwiki.com/wiki/Database

Or just take a look at it.

https://www.elektroda.pl/rtvforum/topic1562028.html

Did any of you manage to tune to the FM radio in the range of, say, 90> 105MHz?
I have weirdos.
From time to time I hear breakthroughs from the FM radio band on the 10m and 11m frequencies (slightly over 30MHz to 32MHz). Oddly enough, they are not in FM and only in AM.
Unfortunately, I have no chance of correct radio reception in the 88-108 range. In fact, I manage to catch a few stations but they are terribly distorted. I played with the parameters (all of them) and failed to fine tune. Self-made antenna, something like a dipole from the given diagrams made of original parts from dvbt antennas. Installed on the 12th floor on the balcony. 50ohm RG9CU cable. The tuner also sees nothing on the frequency of the Warsaw DAB + mux. Zero. Silence. The specter doesn't even get up.
For testing, tonight I was circling the following frequencies:
145,500; 145,375; 145,794; 144,462; 145.750; 145,775; and on a few from 438,000 to 440,000. I did not catch anything, no conversations, no anything except one short conversation on 144,380 which, according to the interlocutor, was conducted at a distance of about 5 km from me (he gave someone his QTH). Unfortunately, the signal level is 9dB. I don't know what I'm setting up wrong.

Have you corrected the PPM?

Insert the contents of the settings from the program in which you receive. Put also a window where there is modulation, synthesis step, squelch.

internick wrote:

Have you corrected the PPM?

"Lord, it doesn't affect engine operation"

First of all, I would check whether the tuner receives DVB-T, FM and possibly DAB with a dedicated program - eg Blaze HDTV, included in most cases with the set. Of course, you should install the original drivers for DVB-T reception included in the set - not downloaded automatically by the system and of course, tests should be performed on a proven antenna - e.g. on the one with which you normally receive DVB-T at home.

Post a picture of your antenna that you are using.

PS DVB-T will work, we will keep looking.

For DVBT, I have a signal quality of 90> 100%, strength 100%, all muxs (ATZ antenna, no amplifier, balun with filter). I have already managed to set the tuner. He flashes like crazy! The problem was the frequency of the sound card. It was set to 48000Hz by default and everything sounded tragic. I accidentally set it to 192000Hz and now it's great. In truth, a little quiet and you have to listen, but now it works. I listened to "the city" a bit and in a moment I'm going to get my towel! Those who listen know what's going on (460MHz with chunks). A real wonder that's all! There is FM radio, there is DAB +, it even catches audio from TV. As for amateur radio play, I have a little problem. I noticed that "who and who?" Transmit on a different MHz and receive from another. A difference of several hundred kHz.
Is there a chance that such a virtual receiver can receive several frequencies simultaneously?
E.g. 462.000, 462.155, 462.305 and 462.475?
MHz is an example, but this is how it looks like X speaks on one frequency and Y on the other and they can hear each other and I have to jump freq.

Added after 14 [minutes]:

What is the "channel" width in the 440-460MHz band?
Is there any way to "center" the frequency and find the "middle"?
I noticed that the example frequency on which someone is transmitting strongly spreads out. It is heard on 434.100, heard on 434.200, 434.300 ... etc. Over 0.65MHz. This is how it should be?

Added after 1 [hours]:

I have one more request because google speaks English and I don't really understand this language.
If someone could explain to me what the following functions are for - I would be grateful.

NB IF, AFC, NB RF, NR, AGC, NOTCH, Anotch, AGC off,
I remember something about playing 10m years ago, but I don't want to remember it wrongly.

NB IF = Noise Blanc Entry?
AFC - Automatic Frequency Control?
NB RF - I don't know
NR - I don't remember either
AGC - Automatic Gain Control?
Notch and Anotch - I don't know

A few more questions for the end and I promise that this week I won't bother you anymore.
What's better for listening?
Directional ATZ antenna for DVBT or a self-made half H-shaped dipole?

Which cable should be used for a distance of 2.5-3 meters? 50oHm or TV 75OHm?

I understand that the balun (with a filter and without an amplifier) from DVBT is thrown out, right?

Well, what about SWR? Should I worry about it being only on receipt?

Oh, I forgot to mention that I would like to create a directional antenna. I cannot go beyond the edge of the roof of the block, so the antenna must be on the balcony. On the right and left side of the balcony I have several staircases, so quite a wide curtain from the north. Fortunately, I have the south side facing the city.

And the last question: will the DVBT module plugged directly into the USB collect any garbage (interference)? I think that a 100 cm extension to move the module away from the computer is enough, right? I have a small problem when the fan turns on at maximum speed. The noise level, e.g. at 440MHz, increases by a few dB.

Once again, sorry for the pathology. I will try to analyze the information on the club's websites as soon as possible and speak to someone specific who will help you reach your destination in the future.
Once again, sorry for the bluff associated with the funny DVBT decoder, but I hold back strongly before buying a towel. I will be bothered by the TX button at the bank, so I prefer to improve my listening session and wait a few months.
Thanks for all the help.

Added after 7 [minutes]:

PS. I wanted to POKLIKAĆ helpful post on (+) for everyone but it writes me that I'm new and I can't. I will repay you in the future.

My friend tiqi first, write what program you use to receive this radio, you probably listened to the radio with bad modulation and wrong bandwidth setting, so you had a "tragic reception". Secondly, in the band from 28 to 34 MHz, harmonics from the 86-108 MHz band are often heard with these tuners due to the strong transmitters and this is normal. As for transmitting on one frequency and receiving on another, it is nothing else than a traditional repeater or "cross band". I recommend reading the forums for hams about the basics of radio communication. The width of the channel is always dependent on how the services are set and it is differently 6.25, 12.5, 25Khz. As for the antenna, I recommend a dipole or an ordinary quarter, there are schematics to look for.
Descriptions in English can be translated at http://pl.pons.com/t%C5%82umaczenie-tekstu
Or whole pages
https://translate.google.pl/?hl=pl

By connecting the tuner directly to the port, you can accidentally damage the port, a well-shielded extension cable is recommended. When connecting, pay attention to which port you have the least interference. In my case, there is no disturbance at one port, and at the rest they were different.

Man, I already wrote somewhere what I use. Probably in a different thread, so I repeat the entry:

The program is HDSDR version 2.70 running under Windows 7 x64.
It's okay, but for example, yesterday I couldn't catch anything. Barely. Before yesterday, I had a DVBT antenna set on the balcony. Antenna with an impedance transformer with a filter and a tee on the cable. You could hear something, but it was so quiet! My speakers (headphones) are of very good quality (TDK Japan), the laptop is set to max. volume, all sound card settings to max. volume, but callers are heard so softly that I often don't understand what they are saying. Yesterday I decided to put together a different antenna from DVBT (ATZ long directional) to disconnect from the TV installation. I led everything with a 75oHm cable because I was already 50oHm short. Without the balun. Unfortunately, nothing can be heard, although the antenna is 4x larger than the previous one. Today I will build a different antenna.

I present screenshots of the program and settings:




I used this article: http://sq6net.blogspot.com/2014/07/instalacja-rtl2832u-i-sdr-na-windowsie.html

but for me, point is not working. 14 and 18 of this manual because I was looking for files from the article via google (the article is no longer active) and maybe something is simply missing. Today I am planning to: http://www.genesisradio.com.au/GSDR/

Click on the "ExtIO" box to the right of the frequency and make a screenshot. From what it looks like you have an inactive window, which is probably why your program is not working as it should. Or if you want, go to this post earlier, I threw HDSDR programs there and SDRSharp below. You unpack, turn it on and they work if you have replaced tuner drivers.

https://www.elektroda.pl/rtvforum/topic2353101-600.html#15098919

That's what I was about to ask and I even made a screenshot with what I don't understand. And so:



in the field marked in red I have to have DISABLED because the rest of the functions mean that the receiver does not receive anything, not even the FM radio.
I marked with yellow the parameters that I must have set to max. their values because reducing them causes the receiver to go silent.
Green marked options that I do not understand, but turning off RTLAGC causes the receiver to turn off. He picks up but everything is distorted.

Soon I will go to the link you provided and install other files.
Oh, the buffer only works at 64kB and an attempt to adjust it causes silence in the speakers.

I would like to add that my biggest problem at the moment is the lack of knowledge of the frequencies on which the mower is definitely transmitting. In truth, I found some municipal services, but there is no chance to set up the equipment on it. Apart from modulation, they also broadcast something encoded, which causes such noises that it is impossible to listen to it.

---
Unfortunately, the substitution ended with an error. I will try to install the entire program.

Do not replace files, just download the program, unpack and turn it on. Simpler for you would be SDRSharp a few posts above are packed and thrown. The service was also described in this topic, you must read the previous posts.

It works the same. The modulation is very quiet. I will check SDRSharp in a moment.

Low modulation is the result of the setting. It should be NFM, not FM. Regular radio stations broadcast in FM.
Each radio transmits on a narrow band (NFM).

I'm testing Sharp right now. The FM radio is loud and clean. I tried to listen to pow. 450MHz and it's still very quiet. I guess it's the antenna thing. I also tried to set something up and messed it up. I switched SampleRate to the highest (SDR received the best on it) and unfortunately now I have this:



no matter what value I set. Error crashes from highest to lowest.
Okay, I'll see it as I complete the right antennas for 2m and 40cm. I'm going for materials. Oh, and you were right. Sharp is intuitively easier so I'll stay with him.

Set NFM (narrow) not WFM (wide) ASIO bites

Actually, SDRSharp is very user-friendly and less resource-consuming when it comes to hardware. Do as I wrote a few posts above. Since starting RTL2832, I have been using SDRSharp and I have no problem with reception.

Welcome. Earlier in this topic, someone mentioned ready-made receivers with upconverters, Chinese inventions and high prices, and I would like to draw your attention to a Japanese invention that has already been released in its second version: Soft66RTL2.
It is based on the R820T tuner and the RTL2832U chip, with a 50MHz converter
There are many positive opinions and even a comparison with Microtelecom's Perseus
Video
Text

The prices of both receivers are at the opposite poles and the possibilities of a small box from Japan seem sufficient even for an advanced listening enthusiast. Today, the price on ebay is around $ 40, which is around PLN 160. After the possible (and not 100% certain) addition of customs duties and taxes, it should not exceed PLN 250. I'm tempted to put it in the basket.

Project author's website

Why overpay? This "Japanese gem" is no different from Chinese since exactly the same components are used. Why pay 250 zeta as you can only 50; P

For PLN 50 it is only a noname without a converter, although on the R820T2 and for a Chinese with a converter I have to give about PLN 260-300, so I paid attention to the soft66rtl2. JA7TDO does it with his own hands and I prefer to take something from a man who puts his time and knowledge into it than to something massively tapped. Of course, everyone decides to buy for themselves, or you can also do something yourself.

But then you can buy the converter what you want, or you can make it yourself, as you write. As for "no name" they are great. I once bought a dongle out of curiosity for PLN 30 (a TV set based on R820T and RTL2832U chips + appropriate drivers downloaded from the net). Later I bought an upconverter from a Greek gostek (100 MHZ down). I wanted to listen to the program of the first Polish radio on 225 KHz Really everything flies connected the first time, which is important for pennies! Best regards.

Well, you can see what it is like. I took up the subject of SDR 2 weeks ago, I want to finally listen to the 80m band after 16 years of break. For now, 2m and the vicinity can be heard and it would be useful to go lower, and because I wanted to have something in one box, I'm looking for something interesting for reasonable money. For now I have LV5TDLX working with different antennas and it's pretty cool, we'll see what happens next.