EXFO FTB-1v2 Guia Del Usuario página 400

Data Types
Applicable Data Types for Output —IEEE 488.2
<OCTAL NUMERIC RESPONSE DATA>

This data type will be used by a device to return integer representations
in octal (base 8).
Examples: #Q753214, #Q0124, #Q0725
388
# Q
0
1
2
3
4
5
6
7
FTB-1v2 and FTB-1v2 Pro