Fixing wrong P-CODE e.g. provider display programing
To fix a wrong P-CODE which my cause a crash or freeze of the SPECTRAN simply start the factory reset which will delete all user files and give you a clean, working unit.
You might need to enter the menu (to enter the factory reset) BEFORE the sweep starts to prevent the unit to crash or freeze.
You can do this by pressing the menu key directly after switching the SPECTRAN unit on (V4 units: as long as the boot logo shows up).