Posts by PA3FBX

    Hi, quickly wanted to let you know that i've just ordered myself an Adalm Pluto :D

    I'll try to add support to the demod gui the week before christmas.

    Also, one of my goals is to implement LDPC decoding with multiple CPU cores.



    Here also volunteer for pluto beta test.


    Hi Tony,

    Thanks for the info.

    Never found 2.0.10 yet but got a version 2.0.11 received thanks to PE1ANS.

    Was not a improvement, most likely me used to work with 2.0.12 to much resulting in better signals.

    In the mean time i got a pluto Adalm and worked with that on the NB..

    This results in no DATV activity as pluto is not supported in this DVB-S software..

    Did lots of improvements on the reception part witch may result in better working of the DATV.

    So i will fire up the RTL stick this weekend and do some more tests...

    Best regards


    thanks for your input.

    i have running here 2 different dds and 2different si5351 units.. running on arduino or pic contollers. all have the same problem. to same type lnb,s with same 25hmz input. all running fine on gpsdo.

    i have an old 500mhz spectrum analyzer and a old scope . i may be able to check amplutide rimpels. have no clue how to analize the rest..

    gathering more ideas...


    Danke Heiner,

    I allready expected the squarewave harmonics problem. therefore i build low and high pass filters but not with a xtals filter yet

    i ordered a bunch of xtals on ebay for testing the idea. in the mean time i wonder why others make multipliers out of 10mhz connect it to there lnb, and don't say annything of this problem. the multiplies must have squarewave output as well..

    i know the si5351 output is really dirty but i was not expectiing harmonics every 800hz...

    Well, to be continued,....


    hi, i have an unclear problem to me. I have sdr console running with RTL stick and receive eshail great. But to stabilize the lnb i made 25 MHz input. IT works fine with gpsdo from a local ham.

    But when connecting dds or si5351 running 25mhz i get sideband spikes every 800hz. Check pict..

    Note the left waterfall is the NB cw beacon .

    With xtal driven lnb its normal 1 spike and with dds or si5351 8 Spikes..

    I tried raising and lowering 25mhz Signal strength and tried low and high Pass Filtering..

    But the 8 spikes Stay..

    Beacon signal is between 30 and 35 dB.. Noise floor is ok..

    Any Idea beside buying other stuff is Welcome .


    Try dvbs-gui.

    SDR angel works here in ssb and has also dvb s2 but i was not able to decode the beacon yet. Never got propper constellation...

    dvb S- gui works and got the beacon and several other vids but very unstable and a bitch to setup sofare.....

    Hi all, New to the forum but an old ham here...

    @ Markro92 Kann du ein alteren version auch online bringen.

    Ich wurde gerne 2.10 oder 2.11 au mal versuchen weil 2.12 functioniert aber sehr instabiel.

    Lauft hier on RTL stick und win 10 mit 1 meter spiegel..

    Vielen dank fur die vielllllle arbeit, aber es freud uns vieeeeeellllll...

    73es Benno