NB Station for Es'hail-2
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Remco, Simplex MODE???
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Cannot answer, because of ... NDA concerning magic box ; -)
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Cannot answer, because of ... NDA concerning magic box ; -)
but maybe there is an RTL-SDR inside, the TRX definitely isn't Fullduplex.. or am I wrong?
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In my setup (described here) i solve this problem with a function called "auto tracking". It tunes the transmitter frequency automatically depending on receiving frequency. Fine tuning of RX/TX offset is possible too.
It would be interesting when I can try your software.
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It would be interesting when I can try your software.
If all works well after opening nb transponder it will not be very long time for preparing sd card image with first (beta) version
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DL3DCW Your solution is VERY elegant. I did not follow the thread concerning 'software locking' precisely but is it possible with one (e.g.) RTL-stick?
Not yet, but maybe in the future. The two-stick solution is currently easier for me to implement in the software. I also think that this solution is a little bit more flexible. For example if there is a large frequency space between the reference signal (like engineering beacon) and the pass band of NB transponder.
Because it is a little bit off topic maybe we should discuss this solution in this thread: NB Station for Es'hail-2 ;-)
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I got mine a few days ago. Very nice device.
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I got mine a few days ago. Very nice device.
Fully agree. Quality.
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Fully agree. Quality.
With that name and price, it is what you should expect.
(well, I would have expected a 10 MHz input. but it could be that it is already very stable without it)
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What type of splitter do you use to connect the two SDRs and the DC feed to the RX antenna?
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There is a picture on page 2 of this topic. Those splitters are readily available from satellite-TV equipment stores and webshops.
But this is not at all critical. I made my own bias-tee from some junkbox parts.
The LNB has such a high gain that anything you do to the IF signal (like lossy cable or splitters) really doesn't matter, you already need to turn down the gain of the RTL sticks by 20-30 dB to avoid overdriving them...
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I used a 4times regular sat-splitter:
1 port to my SDR
1 port to my analog receiver (IC R7100)
1 port for DVB s
1 port to inject the voltage for the LNB
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Hello DL3DCW,
Do you have an sd image of your solution to test it ?
Thank you
Best 73's
Michaël ON7KGK
DL3DC