Posts by ON7NDR

    ik4idy , G0MJW : this is a info for all amateurs

    datvexpress accept only directshow windows devices that are "visible" in your sytem.

    so , after installing virtual cam (directshow) plugin for obs , datvexpress can see the camera and tx the video from obs.

    when you choose obs-audio , there will be a warning that there is no audio grabber or actualy no directshow audio element.

    if have been doing test with vb cable, voicemeeter, etc , was not working!

    yesterday i maybe found a good solution?? go to audio settings pc , recording , deactivate your normal microphone

    then activate the "stereo-mix" as standard device

    leave the playback on normal speakers.

    now open datv-express , and stereo-mix (microphone loop) will also be seen in the "live" and "audio"

    restart datvexpress and transmit video from the virtual cam and audio from "steromix" virtual system

    i is working on ic8ecf , have tx yesterday with this test.

    can someone test if the audio is good ??? please give me a respons to this message.

    just for info also, if you activate also your normal microphone , you can talk also in your tx video.

    keep stereo device standard device and microphone communicate device then..

    thank you. this message will be deleted if this is not a good simple working solution

    many thanks nico

    on7kec ,dit ziet er normaal uit ; airspy device opened > driver werkt dus

    klik op het andere kleinere venster waar al die details van de versie staan en veranderingen , kleiner scherm onderaan op de ok klikken.

    programma start dan pas op !

    wanneer programma is geladen , download mijn kleine nederlandse handleiding om verder wijs uit te geraken en te starten , het gaat niet vanzelf...

    veel chance nico…32u%20en%20amsat.pdf?dl=0

    indien het op niet lukt , kan je me mailen op >

    of eens afspreken en begeleiden via anydesk applicatie (gratis) remote desktop

    of gewoon met google chrome remote desktop control applicatie of met teamviewer....

    teamviewer is de laatste tijd niet meer goed ,indien je een licentie wil kopen , doe ik niet...

    73 nico

    zet de samplerate van airspy niet te hoog , zodanig dat je bandbreedte niet te hoog is om de smallere signalen toch nog te kunnen bekijken , zowat 3 Ms is genoeg indien dat kan , heb zelf geen airspy dongle...

    Hello all,

    Our friend miguel CT1BYM was this morning active and he did again a test in 8 PSK and also DVBS1 mode

    the software again was sdrangel and our regular rtl2832u dongle

    the 8 PSK was NOT decodable here .... but than miguel give a monster signal on our birdy in 333 ks and also 500 ks DVBS1

    he made his first tryout in DVBS 1 mode , so congratulations friend miguel

    here you have the screenshot from 333 ks , bandwith was about 500 khz (333 x 1,33)

    here is the full image SDRANGEL DVBS1 CT1BYM SR 333 kS 3/4 fec

    INFO : sdrangel is software from F4EXB :…sdrangel-4.11.0-win64.exe

    hello all , just for a info...

    today i have also done a small test with datv sdrangel 64 bit windows software for normal dvbs 1 and also other modes...

    the station was on 250 ks sr and fec 2/3 dvbs 1

    decimation was set on 1 and SR dongle was 2400000

    gain had to set to 48 before constellation was ok.

    but it works...for a normal dvbs1 station and h264 codec.

    picture was good on the small datv screen .

    g8gkq was decoded..... dvbs1... maybe 8 psk works also. will test

    Hallo , nog eens een guide /handleiding hier van mij in het nederlands.

    je moet inderdaad altijd eerst correct afstemmen met de software.

    dan onderaan midden goed blijven kijken als de sr gelijk blijft of ontspoord..

    de dunne gele fijne lijn moet zich zo goed mogelijk in het midden van de voledige gele /blauwe/oranje/ waterval bevinden.

    probeer eens een 333 ks te decoderen , gaat soms makkelijker dan het baken.

    dutch duide:…32u%20en%20amsat.pdf?dl=0

    i hope that someone can make a guide in portuguese /german/spanisch/italian/russian also....


    the official links on the other page's for dvbs-demod -gui are again working fine and no popups or redirections anymore to other url's

    thanks for solving the DNS issue ...

    73 Nico De Roo , on7ndr/ jo11sf /st-laureins belgium

    hello , dg7yeo

    Can you please test the mueller and muller filter instead of gardner filter for the beacon. center your frequency from beacon as good you can .

    keep also your eyes on actual symbolrate (under middle)

    when symbolrate is going higher , slightly go 1 symbolrate up and down. (stabilisation and reset)) time recovery

    the symbolrate must stay around 2000

    than try carier recovery .start with loop damping full to the right side

    give then gain intil you see constellation. then lower to 0 loop damping (ful left side)

    keep gain to loop gain to about 3... enable it...

    then as last step , choose the fec and then enable also the ldpc ...

    tip ,for all lower symbolrates use the gardner filter

    it is always best when you start , do not enable the ldpc and also no enable carier.

    i hope this info will help you

    73 , nico

    Hello all , name is nico , call on7ndr8)

    have found this interesting info from a DUAL BAND feed from DD1US for QO-100 es'hailsat2 , homemade by Matthias Bopp himself.

    looks very interesting article how matthias has build the dualband feed system with also help from other german amateurs.

    go to webpage

    then choose ,>> " home downloads"

    here you will see the dualband feed descibed , article is in PDF format , since it is 5 mb i can not post it here as attachment sorry

    hope you enjoy reading his article to . good job from matthias

    73 nico:)

    picture dualband Es'hailsat DD1US feed:)

    HI Markro92,

    Ho provato la nuova versione (2.0.8), ma non riesco a decodificare i segnali inferiore a 1 MS ....Can you decode with low MS? ..


    Version 2.0.8 decoding fine for also low symbolrate's , use gardner filter(rb) instead of mueller and muller ted (wb) in time recovery window.. (up right)

    Also for all symbolrate below 500 ,(333,250,125,66) i change the samplerate/bandwith to 960000 instead of 2400000. just for info

    images from stations with rtl 2832u dongle decoded and this 2.0.8 version.

    G7JTT on 250 Ks , John , thanks for the test transmission on 250 Ks dvbs2

    F3YX ON 333 Ks DVBS-2

    DL9OBU richard with 500 KS DVBS2- MODE

    first transmission from poland SQ6QV legnica on 250 ks

    Helmut dg3khs cologne/keulen on 1000 Ks

    Cpu is only intel pentium 3 model 3220 >> DUAL CORE and 8 RAM Memory ,

    Antenna channel master 1,2 meter offset dish and the normal rtl dongle (dvbt-dab-fm..) rtl2832u /rt820t2 tuner inside.. used on the LATEST 2.0.8 version amsat-gui

    CPU-Z info

    The normal DRAM frequency from the DDR3 memory is 1333 mhz

    Since it is dual core cpu , it is splitted into the half speed DRAM
    computer since 2012 in use....

    PE1CHY , Rob only 5.5 db C/N (monitor batc) decoding on 1000 Ks

    Hey tony ik1hgi , can you contact me via skype..

    i see that you are on skype..

    have added you in skype...please accept invitation ..

    maybe i can help you to see what is wrong..

    my computer is about 6 years old , but it is working..

    let see... 73 ciao

    hello all,

    i just give this as additional info .

    i have a universal lnb with a outside line amplifier johansson 9604 type(waterproof)

    the line amplifier is direct connected to the lnb ..... mounted @lnb

    so a additional amp is used to give a 10 db more gain on 743 Mhz

    the line amp gives 18 db @2300 mhz , 13 @950mhz...

    ok , you can ask yourself way? the s/n c/n stays the same ? yes.

    have noticed that then the analog bb gain is set quite what lower in the software himself and the decoding goes better because i don't have to give extra analog bb gain from the rtl analog amp inside.... to see for example the orange waterfall on beacon coming on waterfall.

    have done test with the line amp and without the lnb amp on beacon for example , in my case it was always better with the sat line amp inbetween. not a inline type

    these are not waterproofwelded)

    can someone do the same please as here noticed ? please share it or post it on this forum

    is this info also better at your side with a regular rtl2832u?

    the satrx (stb) is set to 10300 with horizontal polarisation 19 volt.

    then the loop out from the same satrx (stb) has no dc , but only IF (rf) goes out

    check/messure the voltage on the coax of the loop out , only RF (IF) may come out , NO VOLTAGE !

    then connect the coax to the rtl dongle /rtl2832 /rtl2838

    then run software.....

    73 nico