Indicate the supported err-insert level.
It's described by bitmap. From low to high, the different bit position indicates whether or not support 1, 1e-1, 1e-2, 1e-3, etc.
e.g. 0x1FC (0b111111100): Range from 1e-2 to 1e-8 supported.
0xA (0b1010) : Only 1e-1 and 1e-3 supported.