There was a small DC offset (~4-5mV) in the Red Pitaya analog front-end inputs. According to the User Guide it should be possible to compensate the offset by adjusting some EEPROM registers. [code light="true"]http://wiki.redpitaya.com/index.php?title=User_Manual#Calibration[/code] The User Guide also shows a simple shell script that measures the offset from the captured input samples. If we denote the input … Continue Reading ››