OsmoSDR sensitivity

Christian Daniel -- maintech GmbH cd at maintech.de
Tue Mar 6 16:49:02 UTC 2012


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Hi guys,

I measured the sensitivity of our OsmoSDR. For that I did the
following commands:

tuner.init!
tuner.freq=465000000
tuner.dc_calib!
tuner.dc_table!
tuner.gain=6,9,9,2,15,15
tuner.iqofs=43,27,0,0

I did the measurements on no-so-even frequencies to avoid any lines in
the sprectrum. I increased the power from my signal generator until a
SNR of 10dB as achieved. The RX was tuned 100kHz lower than the TX
signal and the I/Q offset was calibrated before every measurement.

65.2MHz: -99dBm
145.2MHz: -102dBm
435.2MHz: -104dBm
945.2MHz: -85dBm
1300.2MHz: -89dBm
1500.2MHz: -89dBm
1800.2MHz: -84dBm

Also please note that we have a hole at 1200 MHz - there are no valid
PLL settings here.

The RX is not a sensitivity-wonder. Perhaps a preamp?

Best regards,
Christian

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