Re: Help in identying a jamming signal
Hello there, I managed to record 10Mhz of sample rate which u can find here: https://transfer.sh/vxuyz7zPyH/SDRSharp_20230928_110124Z_67610Hz_IQ.wav It seams that interfering signal is infact DVB-T on Channel 46 with Center frequency of 674 MHz I also managed to capture that interference channel which you can find here: https://transfer.sh/MFmwlKWYG8/AirSpy_20230928_132144Z_674000kHz_IQ.wav I hope the signal is strong enough to be able to decode something I believe the MUX is M2 from PayTV Provider called EvoTv from Croatia: https://www.hrvatskitelekom.hr/evotv How cuold this interfere me I am receiving here: https://maps.app.goo.gl/YeNntbpAk25eMjjC8 I am trying to receive 20kW Federalna Televizija on Channel 47 (PAL B/G) from Velika Gomila: https://fmscan.org/transmitter.php?t=1100309 The interference signal is located in Lička Plješivica, Mirkovica and Stipanov Grič (DVB-T): https://hr.wikipedia.org/wiki/Dodatak:Popis_oda%C5%A1ilja%C4%8Dkih_objekata_OiV-a The interference signal is on Channel 46, my Signal of interest is on Channel 47, thats one channel apart, how can interference even happen I a bit confused V V čet., 28. sep. 2023 ob 16:25 je oseba Fabian Schwartau < fab...@opencode.eu> napisala: > Do you know this site? > https://www.sigidwiki.com/wiki/Signal_Identification_Guide > > I had a short peek and could not find anything, but you may have a bit > more patience. > > Best > Fabian > > Am 27.09.23 um 13:21 schrieb veso...@gmail.com: > > > > Hello there all, I hope someone can help me > > > > I am trying to watch some television on CH47 (679.25Mhz) > > > > I am in Slovenia and I am trying to receive and watch Federalna > > Televizija transmitting from Bosnia and Herzegovina (BiH) > > > > But there is very anoying signal bothering me, you can see the problem > > here: https://youtu.be/wt4vEfu7yEI?si=XDQ8wQ-rK-lb8LMW > > > > Instead of seing PAL and hearing sound, I see this anoying lines and > > hear digital data :( > > > > So I decided to bring my Airspy R2 to visually see and record some IQ > > data on whats going on > > > > So this is what I recorded: > > > https://transfer.sh/dMhDtqnodK/baseband_67925Hz_14-23-42_26-09-2023.wav > > > > Center frequency was 679.25Mhz but sadly I was only able to record about > > 2.5Mhz of Bandwith, because my phone could not handle full 10Mhz > > > > As you can see PAL was bearly able to get through this jamming signal > > > > At first I thought it could be 600Mhz 5G NR which is sadly right where I > > want to receive (663 – 698 Uplink, 617 – 652 Downlink), but thats only > > for US, not Europe > > > > The next suspect could be 5G Extended Lower SMH (which has downlink from > > 698 – 716) but its 20Mhz above my signal, PAL only needs about 6-8Mhz so > > this should not be a problem > > > > Then I thought maybe LTE Lower SMH on 700MHz could be the culprit, which > > again doesnt make any sense (Downlink on 699 – 716Mhz) > > > > I hope something could be done > > > > At least to figure out what signal that is so I can complain to relevant > > local authorities > > > > I am there for a 3 more days, so if needed I can do more messurments > > > > Sadly I only brought Airspy HF+, and Airspy R2 with me nothing more > > capable bandwith vise > > > > I also have Samsung Galaxy S10+ if it can maybe help in messuring LTE > > signals somehow > > > > Thanks to everyone for anwsering > > -- > > Sent from myMail for Android > > > >
Re: Help in identying a jamming signal
Do you know this site? https://www.sigidwiki.com/wiki/Signal_Identification_Guide I had a short peek and could not find anything, but you may have a bit more patience. Best Fabian Am 27.09.23 um 13:21 schrieb veso...@gmail.com: Hello there all, I hope someone can help me I am trying to watch some television on CH47 (679.25Mhz) I am in Slovenia and I am trying to receive and watch Federalna Televizija transmitting from Bosnia and Herzegovina (BiH) But there is very anoying signal bothering me, you can see the problem here: https://youtu.be/wt4vEfu7yEI?si=XDQ8wQ-rK-lb8LMW Instead of seing PAL and hearing sound, I see this anoying lines and hear digital data :( So I decided to bring my Airspy R2 to visually see and record some IQ data on whats going on So this is what I recorded: https://transfer.sh/dMhDtqnodK/baseband_67925Hz_14-23-42_26-09-2023.wav Center frequency was 679.25Mhz but sadly I was only able to record about 2.5Mhz of Bandwith, because my phone could not handle full 10Mhz As you can see PAL was bearly able to get through this jamming signal At first I thought it could be 600Mhz 5G NR which is sadly right where I want to receive (663 – 698 Uplink, 617 – 652 Downlink), but thats only for US, not Europe The next suspect could be 5G Extended Lower SMH (which has downlink from 698 – 716) but its 20Mhz above my signal, PAL only needs about 6-8Mhz so this should not be a problem Then I thought maybe LTE Lower SMH on 700MHz could be the culprit, which again doesnt make any sense (Downlink on 699 – 716Mhz) I hope something could be done At least to figure out what signal that is so I can complain to relevant local authorities I am there for a 3 more days, so if needed I can do more messurments Sadly I only brought Airspy HF+, and Airspy R2 with me nothing more capable bandwith vise I also have Samsung Galaxy S10+ if it can maybe help in messuring LTE signals somehow Thanks to everyone for anwsering -- Sent from myMail for Android
Re: Help in identying a jamming signal
Hi, I'm not a radio engineer and don't use gnuradio much but used to think about these things for hobby hacking. Thoughts: - Recording from multiple antennas simultaneously could: - provide for separating it from the signal using a blind source separation approach - give more information on the direction of the noise - Integrating a signal pulse period to gain detail on it (like with pulsars or van eck phreaking) could reveal things, such as what it is doing if it is a powerful unshielded electronic device Incidentally, I'm quite curious how to do those two things with gnuradio. On 9/27/23, Daniel Estévez wrote: > Hello, > > Taking a quick look at your recording, I see some kind of pulsed signal > that follows a regular pattern. The signal is on for a period of ~548 > usec, then off for two periods of this duration (~548 usec per period), > and then the same repeats forever (one period on, two periods off). This > doesn't look like anything that would remind me of LTE or 5G. > > A wider recording might give more clues, since, since this pulsed signal > appears to be much wider than 2.5 MHz. If you have access to an ADALM > Pluto, you could use Maia SDR (https://maia-sdr.org/) to record. This is > exactly one of the use cases I had in mind when I started the project. > > Best, > Daniel. > > On 27/09/2023 13:21, veso...@gmail.com wrote: >> >> Hello there all, I hope someone can help me >> >> I am trying to watch some television on CH47 (679.25Mhz) >> >> I am in Slovenia and I am trying to receive and watch Federalna >> Televizija transmitting from Bosnia and Herzegovina (BiH) >> >> But there is very anoying signal bothering me, you can see the problem >> here: https://youtu.be/wt4vEfu7yEI?si=XDQ8wQ-rK-lb8LMW >> >> Instead of seing PAL and hearing sound, I see this anoying lines and >> hear digital data :( >> >> So I decided to bring my Airspy R2 to visually see and record some IQ >> data on whats going on >> >> So this is what I recorded: >> https://transfer.sh/dMhDtqnodK/baseband_67925Hz_14-23-42_26-09-2023.wav >> >> Center frequency was 679.25Mhz but sadly I was only able to record about >> 2.5Mhz of Bandwith, because my phone could not handle full 10Mhz >> >> As you can see PAL was bearly able to get through this jamming signal >> >> At first I thought it could be 600Mhz 5G NR which is sadly right where I >> want to receive (663 – 698 Uplink, 617 – 652 Downlink), but thats only >> for US, not Europe >> >> The next suspect could be 5G Extended Lower SMH (which has downlink from >> 698 – 716) but its 20Mhz above my signal, PAL only needs about 6-8Mhz so >> this should not be a problem >> >> Then I thought maybe LTE Lower SMH on 700MHz could be the culprit, which >> again doesnt make any sense (Downlink on 699 – 716Mhz) >> >> I hope something could be done >> >> At least to figure out what signal that is so I can complain to relevant >> local authorities >> >> I am there for a 3 more days, so if needed I can do more messurments >> >> Sadly I only brought Airspy HF+, and Airspy R2 with me nothing more >> capable bandwith vise >> >> I also have Samsung Galaxy S10+ if it can maybe help in messuring LTE >> signals somehow >> >> Thanks to everyone for anwsering >> -- >> Sent from myMail for Android >> > >
Re: Help in identying a jamming signal
Hello, Taking a quick look at your recording, I see some kind of pulsed signal that follows a regular pattern. The signal is on for a period of ~548 usec, then off for two periods of this duration (~548 usec per period), and then the same repeats forever (one period on, two periods off). This doesn't look like anything that would remind me of LTE or 5G. A wider recording might give more clues, since, since this pulsed signal appears to be much wider than 2.5 MHz. If you have access to an ADALM Pluto, you could use Maia SDR (https://maia-sdr.org/) to record. This is exactly one of the use cases I had in mind when I started the project. Best, Daniel. On 27/09/2023 13:21, veso...@gmail.com wrote: Hello there all, I hope someone can help me I am trying to watch some television on CH47 (679.25Mhz) I am in Slovenia and I am trying to receive and watch Federalna Televizija transmitting from Bosnia and Herzegovina (BiH) But there is very anoying signal bothering me, you can see the problem here: https://youtu.be/wt4vEfu7yEI?si=XDQ8wQ-rK-lb8LMW Instead of seing PAL and hearing sound, I see this anoying lines and hear digital data :( So I decided to bring my Airspy R2 to visually see and record some IQ data on whats going on So this is what I recorded: https://transfer.sh/dMhDtqnodK/baseband_67925Hz_14-23-42_26-09-2023.wav Center frequency was 679.25Mhz but sadly I was only able to record about 2.5Mhz of Bandwith, because my phone could not handle full 10Mhz As you can see PAL was bearly able to get through this jamming signal At first I thought it could be 600Mhz 5G NR which is sadly right where I want to receive (663 – 698 Uplink, 617 – 652 Downlink), but thats only for US, not Europe The next suspect could be 5G Extended Lower SMH (which has downlink from 698 – 716) but its 20Mhz above my signal, PAL only needs about 6-8Mhz so this should not be a problem Then I thought maybe LTE Lower SMH on 700MHz could be the culprit, which again doesnt make any sense (Downlink on 699 – 716Mhz) I hope something could be done At least to figure out what signal that is so I can complain to relevant local authorities I am there for a 3 more days, so if needed I can do more messurments Sadly I only brought Airspy HF+, and Airspy R2 with me nothing more capable bandwith vise I also have Samsung Galaxy S10+ if it can maybe help in messuring LTE signals somehow Thanks to everyone for anwsering -- Sent from myMail for Android OpenPGP_signature.asc Description: OpenPGP digital signature
