Posts by dg0opk

    Hallo all..


    i had the same problem in past with low modulation level using a simple SKYPE USB HEADSET with an Soundcard inside.


    The max. Digital Gain in SDR Console is a bit to low....


    so i tried


    EQUALIZER APO to add a bit of MIC GAIN to the mic in the headset and maybe to use some additional EQUALIZER


    https://sourceforge.net/projects/equalizerapo/


    Not easy to configure and install and had also some trouble with other soundevices at first , but i got it working


    73 de dg0opk

    Hallo ...

    made an other screenshot this morning from the "simple pluto analyzer" with 10MSPs on GNURADIO 3.8.1 Ubuntu 20.04


    RX: 80cm DISH, LNB-LO 9.388 MHz (TCXO) H-pol, IF 1105 in CENTER, AVERAGE and MAXHOLD ....


    you can nicely see the sigs of both transponders , NB is relatively weak because of polarisation loss V->H


    So the next time not to much time anymore ... "playing a bit"


    73 de dg0opk

    Hallo ...


    after some recherche in the WEB the Pluto is running now...with upto 60MHZ BW in Spektrum mode (-no decode mode) ...

    (decode of signlas is only possible with lower samplerate and BW < 5MHz because of USB2.0)


    the solution:

    you have to put in the following line in your .bashrc file


    export PYTHONPATH=$PYTONPATH:/usr/local/lib/python3/dist-packages


    after then you can start the gnuradio-companion from terminal.


    (It looks it is a bug in Gnuradio 3.8.1 or later and will maybe solved in the future)


    73 de dg0opk

    This THREAD


    is quiet since some month.... (i dont know why) ....


    With DVB-S2 it is possible to send IP DATA to the full footprint....


    i tested my system with 120cm RX/TX and i saw 3Mbit/s in fullduplex mode uplink/downlink....with my own signal (DVB-S2 Mode VIDEO)


    Maybe IP over DVB-2 is not interesting for radio amateurs? (more for the commercial ones?)


    an idea to get some more for an RX .... with low money system can be found maybe here....


    https://www.heise.de/news/Def-…ter-300-Euro-4865615.html


    Edit: maybe there it is any possibble to get the ip stream also from the MiniTiouner RX? maybe also as interface for other applications like ...plutosdr for TX or plutosdr as fullduplex data transmitter???


    an IDEA also for MAKRO92???


    73 de dg0opk

    Hallo ...


    if you are using the right WIFI-Modules with higher Bandwith 802.11n or better 802.11ac it will be no problem ....


    Like i Wrote


    "giving me 80Mbit in full duplex with low delay ..no problem with Pluto SDR in NB (SDR Console) and DATV"


    73 de michael dg0opk

    Hi,

    Finally I rollback as drivers are not ready yet for most devices. I will like to use Python3 for GNURadio but ...

    Hallo George ...


    installed Ubuntu20.04 now on my Linux machine.... Pluto wit IIO-Oscillocope worked ok and and modules compiled like given in the info from analog devices ....


    BUT:

    I cannot get running Pluto with Gnuradio 3.8.1.... IIO and Pluto block are inside GRC

    getting an error when starting the simple flowgraph... something si missing i think...


    this did not help .... export PYTHONPATH=$PYTHONPATH:/usr/lib/python3/dist-packages


    ----------------------------------------------------------------------------------------

    Generating: '/home/michael/gnuradio/plutotest.py'


    Executing: /usr/bin/python3 -u /home/michael/gnuradio/plutotest.py


    Traceback (most recent call last):

    File "/home/michael/gnuradio/plutotest.py", line 33, in <module>

    import iio

    ModuleNotFoundError: No module named 'iio'


    >>> Done (return code 1)

    ----------------------------------------------------------------------------------------------


    ANY IDEA ???


    Thank You

    73 de Michael dg0opk

    You're right, I know a few other people on our planet Earth, who would be better sent to Mars first, or better just pass Mars. :-)

    I'll be back!

    Danke PETER ... (dass Du "back" sein wirst)


    ich glaube auf der ERDE wirst Du noch gebraucht.... (für weitere projekte?)


    73 de dg0opk

    Hallo ...

    i am using a WIFI Bridge... (6cm) ...since one year now...

    no problem detected until now... worked like a charm and like on the cable connected LAN....


    edit: giving me 80Mbit in full duplex with low delay ..no problemn with Pluto SDR in NB (SDR Console) and DATV


    73 de dg0opk

    Hallo Robert...


    i am using console 3.0.21 with Pluto Firmware F5OEO ("beta for the brave") and PTT out via GPIO0,1 works on my Plutos ...in NB and WB- Mode - but the switch on/off delay is a bit long. (maybe 0.5-1s)

    maybe anyone other can confirm


    73 de michael dg0opk

    Hi all...


    some work for the next weekend... ?


    ANDREW MW7IC2240 MK2 ...maybe running on 12V for a new portable setup....;)

    BUT NOT TESTET so lets see.... (look update)


    73 de dg0opk


    UPDATE: 1.may 2020

    -------------------------------

    first test are done, i got the following parameters with 12V DC input and setting the idle current overall to 1.07A@12V
    ( around 550mA @24V)


    Rf-Drive Idc(A) @ 12V Pout effienciency overall (with DC/DC)

    -------------------------------------------------------------------------------------------------------------------------

    off 1.07

    -3dBm 1.16 26.8dBm low

    2dBm 1.38 31.7dBm 8.8%

    7dBm 2.03 36.5dBm 18%

    10dBm 2.6 38.3dBm 21%

    12dBm 3.48 41dBm 29.7%

    13.5dBm 4.37 42dBm 29.8%

    16.5dBm 5.67 43dBm 29%

    18.8dBm 6.4 43.4dBm 28.5% (SATURATION)


    amp is linear nearly upto max.15W, Pout max =22W @ 24V


    NOTE: you need some additional CAPACITORS because of the DC/DC supply...


    this PROJECT is nearly finshed now....


    73 de Michael dg0opk

    Hallo all...


    some short update...


    got a delivery of the small LM317 modules ... which can be modified with a little work (more than i have thought)


    what to do...


    - remove the trimmer resistor

    - cut out the ground pads on the upper side of pcb

    - make an "island" for the other 2 pins of the trimmer on the lower side of pcb

    - resolder the trimmer

    - add 820R (smd) and 100nF (smd)


    pictures and diagram of the modified pcb attached...


    73 & have fun with modification of amplifiers

    Michael dg0opk