Problem with calibration

[ziutek]

There is a problem with calibration in my scope. Generally CH1 overestimates the measurement by 5% and CH2 has 200 mV offset sometimes, but this vary from calibration to calibration.

I want to debug this problem and have started analyzing the scope_do_channel_calibration function. But the overall FPGA concept in this scope is unclear to me, especially in context of calibration commands. Could you shed some light on this topic and/or or point me the right place in the FNIRSI-1013D-1014D-Hack repository.