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Tobias DG3YEV
เข้าร่วมเมื่อ 23 ส.ค. 2012
DG3YEV amateur radio station
2.4GHz realtime FFT spectrum analyzer/spectrogram protoype with HDMI output from a Artix7 FPGA
*** Sorry for the low res video! I only found my 10Y old camera so far. I'll create futher recordings with higher resolution soon ***
What you see here exaclty is the downconverter AD/Maxim MAX2831 transferring a 40MHz window of the 2.4GHz ISM frequency band wond to a 2x20MHz complex baseband. This is digizied by a Texas Instruments 12 BIT ADC3222 and streamed via 4 LVDS lanes into a Artix7 XC7A100T FPGA. This chip then transforms the time domain into the frequency domain, creating then a screen display send out to a HDMI capable monitor.
It is the first part of the EU-funded research project. In a first step to the 2.4GHz intrusion / hacker attack sentinel device "RA-Sentinel" I designed this Spectrumanalyzer gadet the test the lowest layer. The Spectrum Monitor can be seen as a proof of concept. For some it may be a nice tool already... You're free to go ahead, build and modify it to your needs. All is open available to build it by yourself. I will offer ready-to-use RF frontend s later in my Tindie shop.
Source code, PCB design of the frontend is available here:
github.com/Tobias-DG3YEV/RA-Sentinel/
The ready FPGA biard is available here:
de.aliexpress.com/item/1005006473783593.html
( you may not need the big XC7A100T, maybe the 075 or even 50 is sufficient - if you be careful with the RAM usage or use the external DDR or SDRAM as a buffer (my next step btw.)
73 de DG3YEV
Funding
This project is funded through NGI0 Entrust (nlnet.nl/entrust), a fund established by NLnet (nlnet.nl) with financial support from the European Commission's "Next Generation Internet" (ngi.eu) program. Learn more at the NLnet project page: nlnet.nl/project/RA-Sentinel.
What you see here exaclty is the downconverter AD/Maxim MAX2831 transferring a 40MHz window of the 2.4GHz ISM frequency band wond to a 2x20MHz complex baseband. This is digizied by a Texas Instruments 12 BIT ADC3222 and streamed via 4 LVDS lanes into a Artix7 XC7A100T FPGA. This chip then transforms the time domain into the frequency domain, creating then a screen display send out to a HDMI capable monitor.
It is the first part of the EU-funded research project. In a first step to the 2.4GHz intrusion / hacker attack sentinel device "RA-Sentinel" I designed this Spectrumanalyzer gadet the test the lowest layer. The Spectrum Monitor can be seen as a proof of concept. For some it may be a nice tool already... You're free to go ahead, build and modify it to your needs. All is open available to build it by yourself. I will offer ready-to-use RF frontend s later in my Tindie shop.
Source code, PCB design of the frontend is available here:
github.com/Tobias-DG3YEV/RA-Sentinel/
The ready FPGA biard is available here:
de.aliexpress.com/item/1005006473783593.html
( you may not need the big XC7A100T, maybe the 075 or even 50 is sufficient - if you be careful with the RAM usage or use the external DDR or SDRAM as a buffer (my next step btw.)
73 de DG3YEV
Funding
This project is funded through NGI0 Entrust (nlnet.nl/entrust), a fund established by NLnet (nlnet.nl) with financial support from the European Commission's "Next Generation Internet" (ngi.eu) program. Learn more at the NLnet project page: nlnet.nl/project/RA-Sentinel.
มุมมอง: 100
วีดีโอ
LiFePo4 JK Battery Management System current measuring far from being accurate
มุมมอง 72ปีที่แล้ว
What you see here is the live recording of the user interface of the Victron Energy Multiplus II (GX). We have nice wheater, loads of power comming from the panels, more current than needed for all consumers in the house. When the consumption increases only a bit, the charging current decreases a bit. You see the part of the current that the Pylontech consumes only drops by a few Amps. So shoul...
Abstimmung einer OSCAR100 ES'HAIL 13cm Uplink-Antenne mittels AD Pluto SDR
มุมมอง 2.5K4 ปีที่แล้ว
Gastbeitrag von OE5SFM: Franz zeigt, wie er mit Hilfe eines Pluto-SDR eine Eigenbau Helix abstimmt.
Startup of three different GPS locked 10MHz frequency standards
มุมมอง 2.9K4 ปีที่แล้ว
Three different GPS locked frequency sources plugged in at the same time and checked how they behave. Leo Bodnar, Cartain, Symmetricon. The Oscilloskope is synced to a SpectraTime Rubidium 10MHz source. shop.elektronikidee.de/product_info.php?info=p66_10mhz 40mhz-low-power-gps-frequenznormal-standard-0-005ppm-z-b fuer-pluto-sdr.html www.leobodnar.com/shop/index.php?main_page=product_info&cPath=...
UniGW - UNiversal LoRa gateway for VHF, UHF and 868MHz
มุมมอง 1594 ปีที่แล้ว
Single channel gateway based on the SX1276 by Semtech that shall support classic APRS (2m 144MHz AFSK) 70cm LoRa APRS (ham radio mode), TTN LoRa Features: - CPU STM32H7 1MB SRAM, 480MHz max core speed - Fine timestamp support through GPS (20ns) - 10/100MBit/s Ethernet - PoE Support through Raspberry PoE Hat - Raspberry Hat compatible header socket - I2C LCD connector - 70cm path can be splitted...
Is a LoRa radio chip (SX1276) able to receive GSM900 "2G" signals?
มุมมอง 2044 ปีที่แล้ว
It looks like it is :D The Semtech LoRa chip SX1276 can receive (G)FSK from 800 to 1000MHz up to 300kBit/s, so why not trying to receive the 270.833kBits of a 2G base station? On the video you see a short recording of a GSM dummy burst (slot 0, 935.4MHz, ARFCN 2) picked up at Pin DIO2 of a SX1276 chip. The signal is comming from a R&S CMD57 generator. Of course, now we need to resync on the bit...
FFT with a Semtech SX1255 70cm frontend and a STM32H743 mcu
มุมมอง 6085 ปีที่แล้ว
A quick prototype. The digital IQ data from SX1255 433MHz tranceiver chip are fed via I2S bus into the ARM Cortex M7 MCU STM32H743 running at 400MHz. This performs a 512 point FFT and puts out the result (1 MHz spectrum) inalmost realtime to the LCD port of the MCU. update rate without much optimization is ~155fps.
2m ES with TA1D and LZ1AG at the same time in JN68QQ
มุมมอง 1967 ปีที่แล้ว
Great opening in the Morning of 26th June 2017. Worked 6 Stations from SV,TA,LZ, Z32. Equipment 17 Ele Flexa, LT 2S Transverter, FT DX3000, Homemade kw PA with 50V Transistor BLF188XR. Sry Audio is a bit thin with Sony Xperia. 73 de DG3YEV
DG3YEV station setup during V/UHF Contest May 2017
มุมมอง 3147 ปีที่แล้ว
My contest setup at JN68QQ during the contest. 2m: FT-DX3000 with LT2S Transverter, Solid State PA 750W, 70cm: TS 811E, 250W PA Ericsson Compact 9000 23cm: TR 751E with DB6NT Transverter, 50W PA
80m - Der ganz normale Wahnsinn morgens auf 3635kHz
มุมมอง 8K8 ปีที่แล้ว
Ungeschnittene Aufzeichung vom 10.7.2015 6:52.
2m SSPA 1kW Power amplifier by DG3YEV
มุมมอง 11K11 ปีที่แล้ว
DG3YEV self-build 2m solid state amateur radio power amplifier 1000W using MRF6VP11KH. Some details: Cheap compared to commercial solutions. (~500 Euro total cost for parts. Many parts bought second hand) Very high efficency. About 75% at 1kW output. Single Power Supply 50V 30A max. All other needed operating voltages internally generated. I use old modified GSM base station power supplies (Te...
HAM 2m Tranceiver HOHENTWIEL with external digital LO Si570
มุมมอง 79011 ปีที่แล้ว
DG3YEV listen to OK1VHF 200kms away in Prague. I'm using a 2m Kit Hohentwiel Kit TRX but not with the original xtal LO, but with a Si570 digital oscillator (Funkamateuer FA-SY Kit). Almost the same quality!!! The lower display shows the original analog LO (inactive) and the upper one is the active digital LO from Si570. BTW we completed QSO later with 59 each!!
Schade, man hätte auch mal den DXPatrol GPSDO V2/V3 auch vergleichen können. Etwas günstiger als der Leo. 73!
Very useful experiment. Thanks.
Sehr gute Idee. Was hast Du für einen Richtkoppler? Gibt es da eine Typenbezeichnung? - 73
ich hab auch mal 2 GPS Disciplined Oscillator am 2 Strahl Oszi verglichen. Beide hatten GPS Kontakt, synchron wurden die nie. Natürlich musste dann auch ein Rubidium Frequenznormal dran. Offenbar haben Cäsium Atomuhren eine andere Gangart als Rubidium Atomuhren.
Hi Tobias, great video - one question for dummies like me - were you using your Rubidium to trigger the scope? I mean, if you are making the assumption that the rubidium is best, then trigger to that, however - what if the rubidium was wrong and the leo bodnar was right? Wouldn't that change the perspective? Sorry if it is a dumb question aber wer misst misst mist. :)
Source 3 is the trigger channel and that is the Rubidium FS.
Nice video! George, M1GEO.
endlich, das este video (hab schon viele gesehen) bei dem rüber kommt, das das swr sich vor einem Spiegel ändert! ufb ! den meisten ist leider zudem nicht klar, wo der abstahlpunkt einer helix ist. ...so Rücken sie dann weit ausserhalb des brennpunktes und beauchen unnötig viel leistung. best 73,a
Genau an der Sache mit Focus des Reflektors und Abstrahlpunkt der Helix grüble ich gerade. Nachdem ich keinen lnb dabei habe kann ichs mir ja richten wie es am besten ist. Wo ist denn nun genau der abstrahlpunkt einer Helix mit 4 Windungen? 73, s
@@trombabaroque dazu kann ich LEIDER keine mit quellen belegbare Antwort geben!! leider ....... ich habe einige versuche mit 8 windungen gemacht (da mir die meßgeräte fehlen , bin ich auf versuch und fehler angewiesen!) ich kann dir höchstens einen subjektiven Eindruck dessen vermitteln, was ich erfahren habe, aber wissenschaftlich untermauern kann ich nichts! ich möchte auch keinen unsinn von mir geben!! Versuche einfach die helix an dem Spiegel zum empfang sehr schwacher signale zu benutzen und verändere den abstand schrittweise, bis ein maximum gefunden ist..mehr weiß ich darüber auch nicht:( best 73!
Offenbar eine gute Lösung, mit dem Blechstreifen bin ich nicht klargekommen. Mit dieser Lösung komme ich auf ein SWR von 1.04:1 = -35dB - ein Traum. Die verwendete Software nennt sich "SATSAGEN" für den Pluto und ist von IU1KVL .
Gute Methode - meine Frage - welches Programm verwendest du ? 73 Günter DL9GMX.
Was für eine Software nutzt du zum messen von S11? 73s
Having a visual representation of what happened is great however it would have been nice to use a frequency counter based on the rubidium to measure the frequencies of those GPS oscillators over time.
Hello, at first i found your prototype really interesting and have some questions: 1. which I2S Mode / configuration is used for communication? 2. could you also use the tx path to send data ? 3. would / could you share your code ? Best regards, Frank
hello I would be interested in your control systems and management of your display sspa if possible thank you in advance f5mag
noisy enough to grind coffee
Shiiiiiiiiiiiiiit man. I wish I could do 1000 watts on 2 meters holy fuck.
Wenn Schwachsinn auf Irsinn trifft, dann ist man auf der 3635 kHz genau richtig.
Hi, Can you build one for me? Send me an e-mail. Thank you. PY1LO
Very Nice !. What Amplifier board are you using ?. 73's ZL2BRG
it seems great.
Beautiful Work Tobias, I am just building one myself at the moment well done!