Hello,
I am a coworker of Brenna’s. I am working on the interfacing, driver, and FPGA side of things. Currently we have basic receive and transmit functionality in place and the ability to work with open source software packages like GNU Radio.
The main issue we are facing right now is a large DC offset in the spectrum of measurement, even with all of the DC calibrations being done. There is about a -50 dBm DC signal in the spectrum of measurement, approximated by comparison to another input signal level. Attached is a picture of the spectrum in dBFS (dB with respect to full scale).
There is also the matter of the spur close to 906 MHz. There are other spurs and further investigation is needed for figuring out where they are coming from.
Any help with these issues is greatly appreciated.
Regards,
Nelson Silva