Transmit data with PlutoSDR but no signal

[John132-LI]

I follow the instructions to build the project on Ubuntu 20.04. Then create "gpssim.bin" and try to transmit to Pluto SDR via "plutoplayer".
Command lines are shown as:
./gps-sdr-sim -e brdc0360.23n -l 1.378898,103.807031,100 -d 300 -s 4000000
./plutoplayer -t gpssim.bin -a -80.0 -b 5.0

Everything seems fine and the console shows "Transmit starts"
but when I use "GPS test" to check the sinal , no satellite is found(Andorid,only on Plane mode)
I don't know if the device is transmitting or not. Anyway to trace it?
How could I find out If something goes wrong ?
Any help would be sincerely appreciated :)

[vxling]

I checked with UBlox, it received signals but the data invalid.

[vxling]

Have you replaced the TXCO on Pluto?

[osqzss]

@John132-LI The original XO on the PlutoSDR board has a very large frequency offset. You need to supply more stable external clock input or replace it to a TCXO.
https://s-taka.org/en/plutosdr-tcxo-upgrade/

[John132-LI]

Thanks for your help. 👍
It turns out that the TX1 channel goes wrong.
I get rid of it and finnally receive signal.
But when I try another test, this error occurs:

* Transmit starts... ERROR: READ LINE: -32 Error pushing buf -32 Done. ERROR: READ LINE: -32 ERROR: READ LINE: -32
What's happening?

[DanishAliChanna]

hello John132-LI

how you solved your problem? i am facing same issue as yours? it appears transmit starts but then no output has shown.

[John132-LI]

hello John132-LI

how you solved your problem? i am facing same issue as yours? it appears transmit starts but then no output has shown.

@DanishAliChanna Hi,thanks for you reply.
My problem is that there was a wrecked capacitor on the motherboard. It took me a few days to find that.
So I replaced it with a new one then everything went fine!
Unfortunately it's been more than half a year and I've forgotten the details.
But I assure that using "Player.c" is the easiest way to create the ouput signal.
May all go well with you！

[Rupak910]

I follow the instructions to build the project on Ubuntu 20.04. Then create "gpssim.bin" and try to transmit to Pluto SDR via "plutoplayer". Command lines are shown as: ./gps-sdr-sim -e brdc0360.23n -l 1.378898,103.807031,100 -d 300 -s 4000000 ./plutoplayer -t gpssim.bin -a -80.0 -b 5.0

Everything seems fine and the console shows "Transmit starts" but when I use "GPS test" to check the sinal , no satellite is found(Andorid,only on Plane mode) I don't know if the device is transmitting or not. Anyway to trace it? How could I find out If something goes wrong ? Any help would be sincerely appreciated :)

hello john132-LI

i am also using pluto sdr.
But i cant transmit the signal. It is saying plutoplayer is not recognised. As you have already used it, can you help me out with what i should do here.