EXFO FTB-500 Guía Del Usario página 366

Data Types
Applicable Data Types for Input—IEEE 488.2
<NON-DECIMAL NUMERIC PROGRAM DATA>

This data type will be used for integer representation in hexadecimal
(base 16), octal (base 8) or binary (base 2). The numeric
representations will begin with "#H" for hexadecimal, "#Q" for octal
and "#B" for binary.
Examples: #Hf3bc015d, #h01a4, #hfe
358
# H/h
A/a
B/b
C/c
D/d
E/e
F/f
<digit>
FTB-500