Do you mean procedures from QHY websites? If so, you should not go this way. One result is the wrong exposure ...When LEDCalibration is performed, it becomes "CSP=4224, CEP=10916", which is close to "CSP=4190, CEP=10930" on the QHY website. ..
Just tested with my cam - exactly the same values, and: in this case nothing was to calibrate, the predefinition did the job. If you had seen "BadCalibration ..." or some illogical output in the GPS status window, you would have had to calibrate manually.On the other hand, the default value of SharpCap is "CSP=6301, CEP=1504297", which is greatly different from the LED Calibration value, but the Exp. value in GPS status is 19971.2us, which is close to the indicated value of 20ms.
To save a found calibration, you must work with SC's Capture Profiles (upper right in the GUI; see the help, if you are in doubt). You may have seen, that the actual calibration is also shown in the CameraSettings.txt file.
We have done some work to understand the QHY174GPS especially for occultations. Something is documented here: https://www.iota-es.de/qhy174gps_workshop.html. There is also a tutorial about SC's timestamp handling: http://www.iota-es.de/SC-Timestamps_01.pdf .
In addition, in the SC QHY sub-forum you can find a lot of background regarding the work/handling of the QHY174GPS (e.g. viewtopic.php?f=28&t=2802#p14626).
Cheers
Christian