On Sun, Mar 24, 2019 at 01:32 PM, Jack2015 wrote:
I may have overlooked an answer to this *old* question. The batteries in my CSA803 were dead on arrival. So I also had to replace the batteries (plus chips) without restoring any data. The frequency measurements are still OK. I may have done some user available calibration though.
This is in line with my conclusion that factory calibration constants were introduced in later models.