EXFO FTB-500 (Window XP) - Manual (Page 365)

Data Types
FTB-500 357
Applicable Data Types for Input—IEEE 488.2

This data type will be used to send short mnemonics when a
cannot be used.
Examples: TRIANGLEWAVE, NCONTINUOUS

(or )
This data type includes , and data types. It will
be used for decimal fractions with or without an exponent. Instruments
will adapt the values they receive to fit their degree of precision. For
example, if an instrument has a precision of two digits after the
decimal point and the incoming value is 12.048, this value will be
rounded off to 12.05.
The second diagram below illustrates the syntax.
The third diagram illustrates the syntax.
Examples: +2.0 e5, –.56E+4, 6.5e–10
+
-
.
.
E/e
+
-