Posts by SaTom

  • RF notch filter for suppressing intense interference

    Dear strannik!

    It is especially difficult to write in a forum in a way that is not misunderstood, especially when it is done in a foreign language, since there are no conditions for verbal communication, e.g. due to facial expressions or tone of voice, but the writing does.

    No one claims that what you wrote is copying, on the contrary, it fills one with joy to read again a piece of writing that one has read and studied before, but then for some reason has sunk into oblivion.
    Perhaps you were the one who inspired that Hungarian author, perhaps you even taught him, and in the end he made a publication out of it. Of course, your work and your helpfulness are both worthy of respect!

    An idea to avoid misunderstandings: I, the always start reading a reaction to my post or writing by assuming maximum good intentions on the part of the person responding. This way, the meaning of the text you are reading can change even if not a single letter has changed. This helps to avoid many misunderstandings.

    Best regards,
    SaTom

  • RF notch filter for suppressing intense interference

    Dear strannik!

    A few years ago I read a Hungarian Satellite DX-r book or magazine published in the 1990s, and which this very solution was proposed and described, for KU band applications.
    (Of course we know this theory, beacause we learned it anno, but for some reason we always forget to apply it... :-) )

    Congratulations on your work, I'm going to my library dig through...

    Regards.
    SaTom

  • Digital Devices Max M2

    Dear Satesco!

    Perhaps my incomplete knowledge of English made my wording ambiguous, since my statement, as I wrote, is based on practical experience with the TBS6903 and the DD Cine S2 V.65, not a new device unknown to me.

    That is why I asked for any possible experiences to be shared.

    A few years ago, I contacted the DD technical support team, interested the support of DX-functionality software on the devices, and the answer I received was, if I remember correctly, and I may not be quoting it correctly, that there are reasons for this due to manufacturer restrictions, whatever this means, but changes cannot be ruled out in the future.

    Well, the future has arrived, but our experience, it seems, does not exist yet, only you and I are thinking about it.

    Of course, this does not rule out the new MAX M2 DX application, since the experiences based on the excellent quality and sensitivity so far allow us to assume that we may also be future owners of a new edition of a great development.

    I still stick to my habit of considering any device that is capable of surpassing any professional device as a relevant target device, regardless of how commercial and less supported it is in terms of software, as long as it can achieve results, since the goal is the same in all cases.

    (I trust that this new DD MAX M2 device will also live up to the hopes attached to it.)

    Best regard,

    SaTom

  • Digital Devices Max M2

    Hi, Satesco!

    Thank you for answer, yes, partly tru is your says, but!

    The Digital Devices Max M2 excellent quality, and very sentivity card , wich especialy good the weak singal receptions, but tru, the the software support worst in the signal analysys and measunrig, however, the my example:

    Me, primary as SatDX amateur, seocndary as TV watcher not mix the two activity, but the devices yes!
    Why?
    The key, the abilities!

    I have one TBS6903 professional card, wich is a special enginer device, and have onest GoldMaster SR-525 also, which is the one low categories commersial set top box, but with expert features, and DX softwares.
    This is already now an anomaly, right?

    Yes. So, momently i using this two devices day to day to the signal montiroring, and analysy.
    But why?

    Because, the TBS not more sensitive than the GoldMaster or neither as the Digital Devices cards. A few years ago, i used long time the DD Cine S2, V2.6, and the LM4 Tesstool, and based on my practice tests, surpasses the TBS card. Yes, the TBS workly the Crazyscann, EBSpro, IQM, and more software, but this dont enough. :-(

    DX-r dont it places great emphasis not only on raw data but also on locking the reception signal,which is not an incidental, but rather an unmissable moment. See look my previous receptions reports, where almost every report, with locked signal frequency visible.

    Therefore, it is necessary to use an alternative device also, which can be the GoldMaster SR-525, or the new DD MAX M2 as a more sensitives device for reception.

    If your using example one TBS card, but the device dont is unable to lock the given frequency, hven though the details data is available, the reception is not successful from a DX point of view, so the reception report is neither relevent.

    This moment, when it is necessary to apply the alternative. Not as a "TV viewing device", but as target devices! So, this alternative devices can be GoldMaster SR-525, or Digital Devices Max M2, which may already be capable of locking the frequency and making the reception report relevant, since by using the two tools together, complete, and sucecesfull report can be generated.

    Last but not least, the DD L4M testool, or the GoldMaster is also able to display detailed receptions parameter information about the data locked in this way, thanks to the low lock threshold. (See my previous posts and receptions reports)

    I hope that I have already managed to arouse your interest, and it is understandable why I have been waiting for this new tool!

    Thank you for your kind attention,
    Regards.
    SaTom

    (Sorry for the poor English)

  • Digital Devices Max M2

    Dear all!

    This morning surfing in the internet, and What do I see, now avaiable the Digital Devices Max M2 :-) This is Super!

    Digital Devices Max M2 UHD/ 4k Multi-Twin Tuner PCIe | DVB-S2X, DVB-C/T2, ISDB-T/S/C, J.83B
    Twin Tuner PCIe for DVB-S2X, DVB-C/T2, ISDB, J.83B. Enjoy multiple TV standards on your PC. Windows and Linux Driver - Unicable Support
    www.digital-devices.eu

    I would buy it, but question, has anyone using this tool ?
    If yes, please share usage experiences!

    Best regards,
    SaTom

  • Invacom LNB types, (Noise and Gain)

    Dear all,

    thanking you for the Invacom measurement confirmation sheets sent to me, in return, an evaluation based on the factory measurements of the six types, thirteen copies.
    (For a better evaluation of the column diagrams, a multiplier of 100 was applied to the noise factor values)

    Ranking list:

    Vertical polarization Low band 960 MHz
    1. TWH
    2. QTF
    3. SNH

    Horizontal polarization Low band 960 MHz
    1. TWH
    2. QTF
    3. SNH

    Vertical polarization High band 2140 MHz
    1. TWH
    2. SNH
    3. QTF

    Horizontal polarization High band 2140 MHz
    1. TWH
    2. SNH
    3. QTF

    Conclusion:
    It is well known that there can be no LNB with ideal operation in the entire range of reception ranges, the evaluation can definitely serve as an answer to which types are able to perform above the average value in relation to all types.

    Regards,
    Tom

    (Google translation)

  • Gold Master 525 Fantastic tool

    :-) Breaking news! :-)

    Dear Satellite Dx amateurs!

    Available the first public R.A.M.F "SR-525HD Diagnostic", to the GoldMaster SR-525 HD!

    Project link:

    GitHub - Csnyi/RAMFstbDiagnostic: Continuous SNR report of a satellite transponder with SR-525HD. Use main branch!
    Continuous SNR report of a satellite transponder with SR-525HD. Use main branch! - Csnyi/RAMFstbDiagnostic
    github.com

    (The software can be downloaded from the project page. Click on the green " < > Code" button and select "Download ZIP" from the drop-down list.)

    How use software in the browser?

    1. If downloaded this software, unpack to an any folder, and load "unpacked extesion" in to browser, or

    2. If downloaded this software, unpack to an any folder, and clilck the "index.html" button. The browser load to the WebAPI software.

    We wish you successful tests and fruitful work using the software!

    We welcome all comments, and feedback on the project page.

    Best regards:

    Csnyi, and SaTom

  • Digital Devices Max M2

    Dear all!

    I very wait the Digital Devices brand new DVB component, the Max M2 version.

    Max M2 – DVB Komponenten, SAT>IP Server, DVB-S2, DVB-C2 | DigitalDevices.de – DVB Komponenten, SAT>IP Server, S2, C2

    Maybe March i in the past first readed this card specification, and i think, this card the best alternate, or better choiceof than TBS 6903.

    I have a TBS6903, and I used to have a Cine S2 V6.5 DVB card (which I now know was a mistake to sell), based on my experience, its "sensitivity" exceeded that of the 6903 card.

    This my early version S2 V6.5 component not supported the Crazyscan, and IQmonitor, i used alternate softwer in windows, the LM4 card testing tool. This tool knowig the spectrum analysation, showing the signal in the dBµV, and use DiSEqC, Unicable, CI -CAM modul, and have "ActiveMovie Windows" viewer, i liked.

    Testool (L4M) für TV Karten (Download und Anleitung)

    But now, so pleas share information for who knows when this M2 card will be released in to shop, and at what price, and supported the third party software?

    Regards,
    SaTom

  • Invacom LNB types, (Noise and Gain)

    Luckily for me, yes, i know in this facts, beacuse i work electrical engineer. Of course (or, unfortunately) the microwave communication is not my area of expertise, I know the basics, studies, theses, and anomalies, and I also try to learn more and more even at the age of 50. :-)

    I have many professional LNBs, SMW WDL, SMW DRO, SMW X line, NJR, ComStream, etc, and many professional OMT, adapters, mechanical, and magnetic polar switch.

    I know that your question a "matter of principle", please enabling for i answer .
    Yes, the commercial LNBs ( also the Invacom), not have really validated parameters, maximum under laboratory conditions, or not...this only adveristing.
    If we'll think about it, that the example NEC NE3210 FET validated noise parameter min, 0,35 dB and max. 13,5 dB gain. What can you see on the LNB casing? 0,3 dB. Cant be less the resultanat values. The companys dont calculated in the LNB PCB circuit any loss parametr, bandpass filter, is fact obvious, and knowled. And dont good. But you, and i, and many expert amateur know.

    I am focused commercial sector, priority on Invacom products. I do not examine other products, I do not compare pears with apples. During the measurements and tests, I maintain the same system and elementary chain in the state before and after the conversion (the adapter, waveguide, feedhorn and other, so these are not factors). The goal, as I wrote, is exclusively to test the type of Invacom to be selected, to archive its differences, and if successful, to use it in the tunable waveguide power supply that I have planned. It will be a practical confirmation or refutation of a theory, nothing more i dont searc the zero noise, or any factors... :-)

    (Sorry for my poor English.)

  • Sun-Satellites interference

    Dear Amateurs!


    Coming soon here the Sun-Satellites interference time period! This period not good to the DX receptions, but good the satellite dish for inspection, with the sun test.

    My QTH:

    „28E”


    This antenna maybe need in the correction... :-)


    But, this more satellite dish okay...

    „7E”


    and „7W”


    Regards,


    SaTom

  • Invacom LNB types, (Noise and Gain)

    According to them, I guessed right, (or i knowing) :-)

    So far I've processed, reading it up cca. 15 pieces datasheet, I glance at him and i already know, what measuring graphs what is LNB type . (Without i reading the datasheet LNB type section .AND, i maybe now know the "secret", that what type is the "best" consturction. But this study i publishing later... )

    Yes, the right side write, the "standard" marketing kommunications, this not important really, but the type yes.

  • Invacom LNB types, (Noise and Gain)

    Dear Femi!

    Yes, first the data sheet need.

    I readed this Strannik post early years ago, excellent study and test, but the my project another, this is LNB modding.
    (Of course, I know this noise int. interference anomaly theme...)

    So, my the first stepping, categorization of Invacom lnb types according to noise and gain factors. (Using to the datasheet, later of coures with devices...) Second stepping, i to assess, to look at, that the selected Invacom LNB types, how to modificate in the circuti parts, focused to with RF JFET parts. My prject ending goal, changing parts NE3210S01to CE3512K2 HJ PHEMT technology. My plan, that this the modifcated LNB using then to my waveguide project.

    AND, i will use testing the IQmonitor pro :-). (If i buyed the software.)

    Regards,
    SaTom

  • Invacom LNB types, (Noise and Gain)

    Dear DX-r amateurs!

    Please, If you have any type Invacom LNB-s, send to me, or post in the forum the "Actual measured Noise figure and Gain response" titles document, it's easy to read photo, or scanned in format.

    That's what I thought:

    My goal, that i examine, evaluate this LNB typem in NEC NEC3210S01 GF equipped noise and gain indicators.

    Very thanks,
    SaTom

  • 28.5°E Astra 2E <UK beam>

    Dear, all!

    After an apparent skip, a "quick measuring test" at 28.5E Astra 2E H polarization follows.

    (These are not yet the results achieved with the newly designed tube feed and LNB pairs RE: Feedhorn/Waveguide/Scalar Ring , because with that project, the testing and conversion process of additional LNB devices is taking place...)

    So, the presentation of the reception ofthe HL (Horizontal Low) band, two frequencies follows, which can now be classified as among the most difficult receptions in to Central Europe, Hungary due to their polarity, SR and/or FEC values, despite the fact that their system mode remains the long-unchanged DVB-S .

    10714 H 22000 DVB-S 5/6, 10891 H 22000 DVB-S 5/6


    First some screenshots,

    then, measurement result (SR-525HD Diagnostic tool):

    Greetings
    SaTom