Numeric Notation Numeric Notation Numbers shown in other than decimal format are preceded with a carat (^) character and the letter H for hexadecimal (base 16) or B for binary (base 2), or with just a carat for octal (base 8). For example, ^HF = ^B1111 = ^17 = 15. eV+Operating System Reference Guide, 2.x,18321-000 Rev A Page 25