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

Hello,

I changed and now I have such a situation that still a mistake.





What else can I improve?

This is because you did not follow the basic advice, i.e.
- we are listening on Line3, you have Line1 active - to improve the VAC settings, as well as the Windows settings according to the link: https://www.elektroda.pl/rtvforum/topic3182271.html
- the output should be loudspeakers, i.e. device 1
- you do it unnecessarily from the DSD plugin. Paste it again, but do not configure anything except turning on the audio and moving the slider between the 2nd and 3rd bar. Run DSD yourself from .exe

And the continuation of problems.

I changed, I run DSD.exe

Please turn off unused devices as advised by my friend don_viking.
Also replace the DSD plugin with one that will have default settings, i.e. no track, etc.
It does not set itself up at all. I will repeat a third time. You have the correct voice level, audio output, so forget about configuring it and check only enable aux audio.
Manual DSD does the rest.
And I can see it's okay.
The repeater sends frames, e.g. so that the radios log in while roaming to stronger stations. And that's what the picture shows.
Previously, you had a conversation on an amateur repeater only that it didn't go over the speakers.
And mistakes? What antenna are you using?

At the frequency of about 862-863 MHz (WFM modulation), using the antenna, I receive TVN24 audio (without picture). At first I thought it was a breakthrough from one of the cable TV stations, but after checking it turned out that none of them has this channel in the offer of analog TV and on such high frequency.
Where could this signal come from?

@mrqpa

863-865 MHz these are the so-called electronic baby monitors, AV senders and wireless headphones.

These are the so-called classes 1/48 - Link

Directive attached.

At first I was thinking about a wireless microphone and an electronic nanny (the neighbors upstairs have a small baby), but it must be NFM modulation. This device works all the time and broadcasts TVN24 audio all the time, it's strange.

Like a colleague Hektar Zahler he said there are devices that transmit stereo audio in the 860 MHz band and use wide FM for this. In this case, it will likely be the stereo headphones link below and a photo of the offer. Usually the cheap versions have regular wide FM in the 860MHz band, not a digital 2.4GHz broadcast over bluetooth. It can also be broadcast to wireless speakers.

https://www.amazon.com/Headphones-Wireless-Transmitter-Charging-Compatible/dp/B07MKFCHWS

However, I would bet that for unknown reasons, the cable TV transmits analogue TVN24 audio. When I still had a cable, I received this signal on the proverbial wire, and now I have to put the antenna out the window. In addition, this signal is 24/7 since I have a dongle (less than 3 years) and there is always TVN24. Therefore, with these speakers and headphones it is probably not a good lead.
On other things, someone in the neighborhood is using PLC transmitters and it is virtually impossible to listen to signals in the frequency range down to around 70 MHz. You can see how the amplitudes of the interfering signals increase as the link is used more intensively, the sound then more wheezes and "farts". Actually, I can forget about listening to CB radio and the amateur bands 40 m / 80 m.

mrqpa wrote:

At the frequency of about 862-863 MHz (WFM modulation), using the antenna, I receive TVN24 audio (without picture). At first I thought it was a breakthrough from one of the cable TV stations, but after checking it turned out that none of them has this channel in the offer of analog TV and on such high frequency.
Where could this signal come from?

You yourself wrote in this post that it will not be cable because you checked and none of it is on offer. He doesn't understand what you are writing and what you are changing your mind about and why. Or are you just interested in earning points for posting in a topic? But ok, I don't go into it and I'm not interested in it.
Best regards and I wish you successful listening sessions.

Serwus, it is possible to do something in SDR Sharp like in Baofeng UV 5r, that we have two listening frequencies to set and when one is active, it starts, when one stops and something is talking on the other, the other one starts, it is simply listening to two frequencies. I tried to do it with a plug called AUX Vho but it cannot be done, I wanted to listen to, for example, 145 and 179 MHz frequency at the same time, anyone has any ideas? Thanks.

Using the Frequency Manager you can create a small group containing these two frequencies and scan them.

http://www.freqmgrsuite.com

Sumar wrote:

Using the Frequency Manager you can create a small group containing these two frequencies and scan them.

http://www.freqmgrsuite.com

Got it, installed, would you help me configure it correctly?

In SDR Sharp:

Frequency Manager + Scanner -> Tools -> Edit groups -> click on the field, enter any name, enter. The group is created, we close the window.

You set the selected frequency and Frequency Manager + Scanner -> Edit
In this window, in the Groups field, you should see the previously created group - select it. Change other parameters, e.g. Description, as needed. Click Add.

Repeat the above for the second and subsequent frequencies you want to monitor.

Then, Frequency Manager + Scanner -> Scan A Group -> Select Scan Group -> select the name of the group you previously created -> Scan.

I did as you say, only one frequency scans me

Sumar wrote:

Thanks for the detailed instruction I set it up as you showed, on the right only one frequency is scanning, although in group 1 there are two marked I don't know what this is about :D

EDIT: it's already working, I'm scanning can it be set at a certain time? The DVB-T set-top box is not affected by such frequency switching constantly in the background.

fnusb wrote:

The DVB-T set-top box is not affected by such frequency switching constantly in the background.

It "hangs" for him. It is to do what the software tells it to do.

Hi, I have SDR Sharp, I'm looking for a plug-in to receive two frequencies simultaneously? There is such a thing? I have the SDR version v1.0.0.1361, I used the Frequency Manager Suite plugin but on this version it doesn't work for me, I don't know why ... error loading plugin pops up like this.

This is what it exists and is called Aux VFO:
http://www.rtl-sdr.ru/page/novyj-plagin-3

And here's a working package:
https://www.elektroda.pl/rtvforum/topic2353101-870.html#15720135

I would like to buy an RTL-SDR receiver for listening and the Moonraker Scan King antenna. Will this antenna be good? You can't really find reviews about her.

There are no miracle antennas working in the 25-1500 MHz range. I would definitely not pay 190 zlotys for it. Think about what you want to listen to, but simply look for something short on VHF / UHF - this includes airband and bands 144-174; 430-470 MHz, plus separate antennas for other bands that interest you. If you want to listen to CB, buy a CB antenna. Service at 66-88 MHz? There must be something separate too.

A very simple antenna can be copied:
http://www.radionecks.co.uk/viewtopic.php?f=11&t=1970

Thank you very much. I thought it might be something better.
What would I like to hear? 2m and 70cm band, airband and I thought about cb but nothing is happening there now.
I will probably start by making this antenna: https://www.elektroda.pl/rtvforum/topic3117878-30.html#15229343
or http://ve3elb.ham-radio.ch/2m-70cm%20antennas.html

I would recommend making 2 collinear antennas and connecting through a duplexer.
I have several collinear antennas according to one scheme for different bands. The length for each strand is converted according to the parameters given in the drawing. Most importantly, they are open antennas, thanks to which they work quite widely when it comes to reception. The antenna is made for the 430 MHz band and it receives good signals from 160 MHz upwards, even at 868MHz I receive signals quite well. The 145 MHz antenna also receives the CB band, but not as well as the original antenna for this band. If someone has time and an old RG213 cable, I recommend testing this antenna.

Hey, is it possible to stream from the computer from the SDRSharp program of the appropriate wave? For example, after setting up the server on a laptop and opening it on the phone in a browser?

Hello. Once upon a time, I included a description in this topic regarding the reception of a signal with a frequency of 1500MHz.
https://www.elektroda.pl/rtvforum/topic2353101-1320.html#17681243
Now I am adding a diagram of the antenna from the VAISAL probe GPS receiver, which I found on the network. The only error in the drawing is the direction in which the antenna elements are bent.

The direction of the bending of the elements is shown in the photos on the page below.
http://jcoppens.com/ant/qfh/fotos_gps.en.php
Today, with full cloud cover and the antenna in the room, I had very strong signals visible in the photos on this antenna.


Here are links to interesting programs
http://jontio.zapto.org/hda1/jaero.html
http://www.tekmanoid.com/egc.shtml
https://bitbucket.org/scytalec/scytalec/src
Description of the sdrsharp plugin here
If anyone has any interesting programs for receiving signals on this frequency, he can add some links.
Good luck and good reception.



Recently, I did a little modernization on the antenna. You can see the changes in the photos. Behind the antenna there are 2 cable sections connected by a barrel, the first is H155, the second is RG58. I tried to connect the antenna to the amplifier with different lengths of different cables, but this combination was the best. Most likely it is about a filter or choke between the antenna and the amplifier. Then I have an Amplifier connected as you can see in the picture, then about 10 m of H155 cable, then another amplifier and about 1.5 m of H155 cable to the separator and tuner. The antenna is still facing south in the room in front of the window, but I added a sheet metal screen behind the antenna, in this case a chocolate lid. The effects are satisfactory. In the sdrsharp program, of course, only "AGC Tuner" is selected.

For TM85
Spectrum analyzer

Added after 5 [minutes]:

Annex Spectrum analyzer