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Thread: Opinions on GNS5890

  1. #11
    First officer nzradar's Avatar
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    I have just posted a comparison of the GNS against a Beast and surprisingly for the Euro's not as significant a difference as I would have thought. You can find the review here. No login necessary!

    Advice on the antenna is pretty simple:

    Mount as high and as clear of obstructions as is practical.

    Use good quality low loss coaxial. Aim for cable that has a loss value of less than 15db per 100 metres of cable at about 1 GHz frequency.

    If you do buy the GNS you will need a non-standard adapter to convert your external antenna cable from the more common N-Type to the MCX connector used on the GNS receiver.

    Of course this all assumes that you wish to use the GNS as a base receiver opposed to a mobile receiver. Don't forget that the GNS is designed to me small and mobile ans very well suited to sitting at the end of a runway with a netbook and get the heads up on what's where!
    Michael
    Palmerston North,
    New Zealand
    ex-FR24 Feeder

  2. #12
    Captain Anmer's Avatar
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    Quote Originally Posted by nzradar View Post
    I have just posted a comparison of the GNS against a Beast
    How about posting an explanation of the accusatory remark you made earlier? Or are you another "hit and run" poster?

    One thing I would caution. Don't expect any receiver to perform equitably in a high traffic area compared to the very low traffic in New Zealand.

    And comparaing receivers should cover a lot more than a couple of screenshots. Can the GNS5890 handle raw data for Mlat and Beamfinder?
    Mike


    www.radarspotting.com

    Radarspotting since 2005

  3. #13
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    @anmer

    noticed you remarks
    take a look to my video.
    I have actual compared Radarbox, microADSB and beast with our GNS 5890 V3.0

    http://www.youtube.com/watch?v=zFPDVk0Zki8

    what I can definetily say is that the GNS5890 outperform Radarbox and microADSB dramatically
    The GNS5890 is smaller much more handy. Works with ANDROID devices like GALAXY Tab or thats very interesting
    it works also with ANDROID mobile phones ! Very nice....you only need the OTG adaptor you can buy for less than 2 dollars.
    GNS5890 is approx. 5 -6 time faster then microADSB or Radarbox. Measured with PP
    The SBS1 is with my knowledge based on a Lattice FPGA design ....if so....
    I am not sure that the SBS1 will be also outperformed by the GNS5890...could be interesting to see...

    Another point is that the GNS5890 design is very tricky so you have no donought effect which you will
    have using for example microADSB. Normally a good FPGA design has no probs with the donought effect

    I can not tell anything about comp. between SBS1 and GNS I do not have actual an SBS1 but I have seen the PCB design
    On the RF parts there are differences
    The PCB is well done so it will be very interesting to see whats the differences between GNS and SBS1.

    But FPGA designs needs a lot of power so itīs critical to use it as an mobile device ;-)

    the GNS5890 is not primeliary designed for used as a basestation. The design is optimized for use in planes or with mobile devices.
    Therefore we are concentrated to have a good receiption within 200-250nm. We do not see for us any reason to have more range.

    regards

    Bill

  4. #14
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    The GNS5890 is smaller much more handy. Works with ANDROID devices like GALAXY Tab or thats very interesting
    it works also with ANDROID mobile phones ! Very nice....you only need the OTG adaptor you can buy for less than 2 dollars.
    I am curious which decoder software you use on Android and how you channel a high data rate through the OTG port. That is sooo slow.
    I am not sure that the SBS1 will be also outperformed by the GNS5890...could be interesting to see...
    Another point is that the GNS5890 design is very tricky so you have no donought effect which you will
    have using for example microADSB. Normally a good FPGA design has no probs with the donought effect
    Mike: again here, this becomes too biased, reminds me of Brandao

    Andy
    jetvision.de

  5. #15
    Captain Anmer's Avatar
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    To be fair, Bill2002 has admitted he works for GNS.

    Brandao wore a thinly veiled disguise.
    Last edited by Anmer; 2012-12-07 at 08:39.
    Mike


    www.radarspotting.com

    Radarspotting since 2005

  6. #16
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    Quote Originally Posted by Anmer View Post
    To be fair, Bill2002 has admitted he works for GNS.

    Brandao wore a thinly veiled diguise.
    Yes I am working for GNS ....by the way itīs a disguise not diguise
    open speaking it doesnīt matter if I am working for GNS I would tell you the same If I work for another company.
    I just one of the developers team knowing what I am talking about ;-)
    see my other comments in another thread where I explain why we outpreform some other ADS-B receivers.
    There are technical reason for, which you can not ignore
    The other point is that you can easily test by yourself.
    Normally you need to have a switch and to open maybe planeplotter measuring your framerate.
    The other point is that I am not willing to hide things which are definitely happened like the donought effect.
    or do you want to say that the donought is not happened on MicroADSB ?
    do you want to tell the users here that a SDR based ADS-B receiver is a good solution ?
    please tell me your opinion ?

    @junglejet

    we have our own solution for ANDROID working with OTG and it is not sooooo slow it handles the high bit rate easily.
    How can you write something like this not knowing whats going on ? You do not test this because there is no definitly no !
    Software on the Android market or anywhere else working with highspeed serial data over the OTG.
    We are the first doing that with success. So please explain where you have the knowledge that OTG is soooo slow and can not handle such high data rate ? Who is telling you that ???

    Is this a fake?

    http://www.youtube.com/watch?v=kypoIqxuMaA

    no ! and it handles high data rate

    You can test by your self shoot me an email and you will get the APP for testing.
    You can also test our receiver .... and then write your opinion....
    That would be fair

    Whats your opinion about ?

    regards

    Bill
    Last edited by Bill2002; 2012-12-06 at 10:04.

  7. #17
    Captain Anmer's Avatar
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    Quote Originally Posted by Bill2002 View Post
    Yes I am working for GNS ....by the way itīs a disguise not diguise
    My teacher always told me I couldn't spell and wouldn't make a good typist.
    Mike


    www.radarspotting.com

    Radarspotting since 2005

  8. #18
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    @all together,
    I just received today my brandnew SBS-3 because of my testing.
    Test setup is PP as Targetsoftware a 1.5m rod antenna for 1090Mhz with 20db lowloss cable 5m and a RF Splitter
    So all the testreceivers got exactly the same signal from the same antenna ;-)

    Ok ........here it is the result over all Framerate and range .........aplause
    1. Place with 100% the BEEEEEEEEAAAST......well done
    2. Place with 80% theeeeee Yes! SBS-3
    3. Place with 70% the GNS5890
    4. Place with 50% the RADARBOX
    5. Place with 30% the MICROADS-B
    6. Place with 10% SDR Dongle

    Ok.....a little bit prosa about.
    The Beast is really a beast the receiption is good but not the best range. This title goes to the SBS-3
    The Framerate of the beast is unbeatable if you see the "contrail" itīs perfect no gaps
    The SBS-3 has the best range but the framerate is not the optimum the SBS-3 loose a lot of frames
    I have seen also in a nearby position some big gaps in the trail I have to make some investigation if it is a kind of a overdrive for the amp I am not sure...from hardware design I would say may be
    The GNS is to be fair not bad, because of the technology which is different GNS is not using FPGA technology which needs a lot of power
    for a mobile stick quite good. For the PIC based receivers actual itīs the best receiver with best performance and range
    The RADARBOX is near by the performance of the GNS receiver.
    MicroADSB has problems with donought effect and therefor also performance problems which I think could be solved in the future.
    SDR its a performance thing the SDR is not made for fast ADS-B receiption so...for the price itīs not bad for beginners.

    So my fazit is :
    For basestation Beast and SBS-3 are first choice.
    For mobile use and this is where GNS is focused on the GNS5890 is first choice

    so really it depends for what the receiver is needed.

    I tried to make a comparison which is fair and not driven by my job (GNS)

    regards

    Bill
    Last edited by Bill2002; 2012-12-22 at 11:18.

  9. #19
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    Quote Originally Posted by Bill2002 View Post
    @all together,
    I just received today my brandnew SBS-3 because of my testing.
    Test setup is PP as Targetsoftware a 1.5m rod antenna for 1090Mhz with 20db lowloss cable 5m and a RF Splitter
    So all the testreceivers got exactly the same signal from the same antenna ;-)
    Hello Bill,

    interesting. Impressive setup running 6 ADSB receivers in parallel!

    Could you give some more information:
    - What was the framerate that you considered as 100% for the BEAST?
    - Which RF splitter did you use? Did not know about a low loss RF splitter for 6 devices. Some people use the RF-systems SP-3, but this only has two output. connectors.
    - Which SDR dongle did you use (E4000, R820T, or other tuner?)? Which software (SDR#, gr-air-modes, dump1090, ...)? This is very important to know as there is no standard SDR setup.

    Best regards

    Willi
    Last edited by whz; 2013-03-17 at 18:05.

  10. #20
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    Hi Willy,

    I see you are near Cologne....

    if you have time come and visit us here in Wuerselen near Aachen.
    I will prepare also a coffee for you ;-)

    Also you can take a look around what we are doing regarding ADS-B
    We have simulators we have nearly every ADS-B receiver and we have a new one which will be unveiled very soon

    So if you near by us come and visit us....
    GNS GmbH
    Adenauerstr. 18
    52146 Würselen

    brgrds


    Bill

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