EXFO FTB-500 Guía Del Usario página 365

<CHARACTER PROGRAM DATA>

This data type will be used to send short mnemonics when a
<DECIMAL NUMERIC PROGRAM DATA> cannot be used.
Examples: TRIANGLEWAVE, NCONTINUOUS
<DECIMAL NUMERIC PROGRAM DATA> (or <NRf>)

This data type includes <NR1>, <NR2> and <NR3> 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 <mantissa> syntax.
+
-
The third diagram illustrates the <exponent> syntax.
Examples: +2.0 e5, –.56E+4, 6.5e–10
FTB-500
<mantissa>
<digit>
<digit>
E/e
<wsp>
Applicable Data Types for Input—IEEE 488.2
<wsp>
.
<digit>
.
<digit>
+
-
Data Types
<exponent>
<digit>
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