Flatness of RX signal
Posted: Fri Jun 18, 2021 7:34 am
Hello all,
after some time trying to properly configure my new BladeRF 2.0 xA4 for reception i come here for some support for my multiple issues.
First of all when trying RX with no antenna attached, but only a 50Ω dummy load on the input connector, the received signal is not flat but rises the more it goes away from the center frequency. The same behavior is also present with a real antenna.
2 screenshots, one with signal acquired with bladeRF-cli and the other with CubicSDR (using SoapySDR behind):
https://ibb.co/23r4RPq
https://ibb.co/HpjFFJD
For the first screenshot the command used was:
With higher gain it seems to get a little flatter, with lower gain even less flat.
Is this expected behavior or am i doing something wrong ?
Many thanks
after some time trying to properly configure my new BladeRF 2.0 xA4 for reception i come here for some support for my multiple issues.
First of all when trying RX with no antenna attached, but only a 50Ω dummy load on the input connector, the received signal is not flat but rises the more it goes away from the center frequency. The same behavior is also present with a real antenna.
2 screenshots, one with signal acquired with bladeRF-cli and the other with CubicSDR (using SoapySDR behind):
https://ibb.co/23r4RPq
https://ibb.co/HpjFFJD
For the first screenshot the command used was:
Code: Select all
/usr/bin/bladeRF-cli -e "set samplerate rx1 4000000" -e "set bandwidth rx1 3000000" -e "set frequency rx1 2245000000" -e "set agc rx1 off" -e "set gain rx1 40" -e "rx config channel=1 format=bin file=fifo n=0" -e "rx start" -e "rx wait"Is this expected behavior or am i doing something wrong ?
Many thanks